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<h2>API Documentation</h2>
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<li>
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<a class="function" href="#preprocess">preprocess</a>
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<li>
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<a class="function" href="#unnest_generate_date_array_using_recursive_cte">unnest_generate_date_array_using_recursive_cte</a>
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<a class="function" href="#unnest_generate_series">unnest_generate_series</a>
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<a class="function" href="#unalias_group">unalias_group</a>
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<a class="pdoc-button git-button" href="https://github.com/tobymao/sqlglot/tree/main/sqlglot/transforms.py">Edit on GitHub</a>
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<h1 class="modulename">
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<a href="./../sqlglot.html">sqlglot</a><wbr>.transforms </h1>
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<div class="pdoc-code codehilite"><pre><span></span><span id="L-1"><a href="#L-1"><span class="linenos"> 1</span></a><span class="kn">from</span><span class="w"> </span><span class="nn">__future__</span><span class="w"> </span><span class="kn">import</span> <span class="n">annotations</span>
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</span><span id="L-2"><a href="#L-2"><span class="linenos"> 2</span></a>
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</span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a><span class="kn">import</span><span class="w"> </span><span class="nn">typing</span><span class="w"> </span><span class="k">as</span><span class="w"> </span><span class="nn">t</span>
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</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a>
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</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a><span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot</span><span class="w"> </span><span class="kn">import</span> <span class="n">expressions</span> <span class="k">as</span> <span class="n">exp</span>
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</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.errors</span><span class="w"> </span><span class="kn">import</span> <span class="n">UnsupportedError</span>
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</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.helper</span><span class="w"> </span><span class="kn">import</span> <span class="n">find_new_name</span><span class="p">,</span> <span class="n">name_sequence</span>
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</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a>
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</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a>
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</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a><span class="k">if</span> <span class="n">t</span><span class="o">.</span><span class="n">TYPE_CHECKING</span><span class="p">:</span>
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</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a> <span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot._typing</span><span class="w"> </span><span class="kn">import</span> <span class="n">E</span>
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</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a> <span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.generator</span><span class="w"> </span><span class="kn">import</span> <span class="n">Generator</span>
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</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a>
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</span><span id="L-14"><a href="#L-14"><span class="linenos"> 14</span></a>
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</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a><span class="k">def</span><span class="w"> </span><span class="nf">preprocess</span><span class="p">(</span>
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</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a> <span class="n">transforms</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]],</span>
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</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">Generator</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="nb">str</span><span class="p">]:</span>
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</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="w"> </span><span class="sd">"""</span>
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</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a><span class="sd"> Creates a new transform by chaining a sequence of transformations and converts the resulting</span>
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</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="sd"> expression to SQL, using either the "_sql" method corresponding to the resulting expression,</span>
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</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> or the appropriate `Generator.TRANSFORMS` function (when applicable -- see below).</span>
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</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a>
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</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> Args:</span>
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</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> transforms: sequence of transform functions. These will be called in order.</span>
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</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a>
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</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a><span class="sd"> Returns:</span>
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</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a><span class="sd"> Function that can be used as a generator transform.</span>
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</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a><span class="sd"> """</span>
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</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a>
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</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_to_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span>
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</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> <span class="n">expression_type</span> <span class="o">=</span> <span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
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</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a>
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</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a> <span class="k">try</span><span class="p">:</span>
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</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">transforms</span><span class="p">[</span><span class="mi">0</span><span class="p">](</span><span class="n">expression</span><span class="p">)</span>
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</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="k">for</span> <span class="n">transform</span> <span class="ow">in</span> <span class="n">transforms</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span>
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</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">transform</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
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</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="k">except</span> <span class="n">UnsupportedError</span> <span class="k">as</span> <span class="n">unsupported_error</span><span class="p">:</span>
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</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">unsupported</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">unsupported_error</span><span class="p">))</span>
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</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a>
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</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="n">_sql_handler</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">key</span> <span class="o">+</span> <span class="s2">"_sql"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
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</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="k">if</span> <span class="n">_sql_handler</span><span class="p">:</span>
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</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="k">return</span> <span class="n">_sql_handler</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
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</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a>
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</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="n">transforms_handler</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORMS</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">))</span>
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</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="k">if</span> <span class="n">transforms_handler</span><span class="p">:</span>
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</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="k">if</span> <span class="n">expression_type</span> <span class="ow">is</span> <span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span>
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</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Func</span><span class="p">):</span>
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</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">function_fallback_sql</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
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</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a>
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</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="c1"># Ensures we don't enter an infinite loop. This can happen when the original expression</span>
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</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="c1"># has the same type as the final expression and there's no _sql method available for it,</span>
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</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="c1"># because then it'd re-enter _to_sql.</span>
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</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span>
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</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="sa">f</span><span class="s2">"Expression type </span><span class="si">{</span><span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2"> requires a _sql method in order to be transformed."</span>
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</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="p">)</span>
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</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a>
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</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="k">return</span> <span class="n">transforms_handler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">)</span>
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</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a>
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</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unsupported expression type </span><span class="si">{</span><span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2">."</span><span class="p">)</span>
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</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a>
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</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="k">return</span> <span class="n">_to_sql</span>
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</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a>
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</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a>
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</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a><span class="k">def</span><span class="w"> </span><span class="nf">unnest_generate_date_array_using_recursive_cte</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
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</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="n">count</span> <span class="o">=</span> <span class="mi">0</span>
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</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="n">recursive_ctes</span> <span class="o">=</span> <span class="p">[]</span>
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</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a>
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</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="k">for</span> <span class="n">unnest</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">):</span>
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</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="k">if</span> <span class="p">(</span>
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</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnest</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">))</span>
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</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="ow">or</span> <span class="nb">len</span><span class="p">(</span><span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">1</span>
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</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">GenerateDateArray</span><span class="p">)</span>
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</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="p">):</span>
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</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="k">continue</span>
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</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a>
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</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="n">generate_date_array</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="n">start</span> <span class="o">=</span> <span class="n">generate_date_array</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"start"</span><span class="p">)</span>
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</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="n">end</span> <span class="o">=</span> <span class="n">generate_date_array</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"end"</span><span class="p">)</span>
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</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="n">step</span> <span class="o">=</span> <span class="n">generate_date_array</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"step"</span><span class="p">)</span>
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</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a>
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</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">start</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">end</span> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">step</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Interval</span><span class="p">):</span>
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</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="k">continue</span>
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</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a>
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</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span>
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</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="n">column_name</span> <span class="o">=</span> <span class="n">alias</span><span class="o">.</span><span class="n">columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">alias</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">)</span> <span class="k">else</span> <span class="s2">"date_value"</span>
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</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a>
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</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="n">start</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">start</span><span class="p">,</span> <span class="s2">"date"</span><span class="p">)</span>
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</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="n">date_add</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">func</span><span class="p">(</span>
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</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="s2">"date_add"</span><span class="p">,</span> <span class="n">column_name</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">step</span><span class="o">.</span><span class="n">name</span><span class="p">),</span> <span class="n">step</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"unit"</span><span class="p">)</span>
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</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="p">)</span>
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</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="n">cast_date_add</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">date_add</span><span class="p">,</span> <span class="s2">"date"</span><span class="p">)</span>
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</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a>
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</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="n">cte_name</span> <span class="o">=</span> <span class="s2">"_generated_dates"</span> <span class="o">+</span> <span class="p">(</span><span class="sa">f</span><span class="s2">"_</span><span class="si">{</span><span class="n">count</span><span class="si">}</span><span class="s2">"</span> <span class="k">if</span> <span class="n">count</span> <span class="k">else</span> <span class="s2">""</span><span class="p">)</span>
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</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a>
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</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="n">base_query</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">start</span><span class="o">.</span><span class="n">as_</span><span class="p">(</span><span class="n">column_name</span><span class="p">))</span>
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</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="n">recursive_query</span> <span class="o">=</span> <span class="p">(</span>
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</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">cast_date_add</span><span class="p">)</span>
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</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">cte_name</span><span class="p">)</span>
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</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">cast_date_add</span> <span class="o"><=</span> <span class="n">exp</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">end</span><span class="p">,</span> <span class="s2">"date"</span><span class="p">))</span>
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</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="p">)</span>
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</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="n">cte_query</span> <span class="o">=</span> <span class="n">base_query</span><span class="o">.</span><span class="n">union</span><span class="p">(</span><span class="n">recursive_query</span><span class="p">,</span> <span class="n">distinct</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a>
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</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="n">generate_dates_query</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">cte_name</span><span class="p">)</span>
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</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="n">unnest</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">generate_dates_query</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="n">cte_name</span><span class="p">))</span>
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</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a>
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</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="n">recursive_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
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</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">cte_query</span><span class="p">),</span> <span class="n">cte_name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">column_name</span><span class="p">])</span>
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</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="p">)</span>
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</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="n">count</span> <span class="o">+=</span> <span class="mi">1</span>
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</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a>
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</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="k">if</span> <span class="n">recursive_ctes</span><span class="p">:</span>
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</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="n">with_expression</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">()</span>
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</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="n">with_expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"recursive"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
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</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="n">with_expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="p">[</span><span class="o">*</span><span class="n">recursive_ctes</span><span class="p">,</span> <span class="o">*</span><span class="n">with_expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">])</span>
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</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">with_expression</span><span class="p">)</span>
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</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a>
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</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a>
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</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a>
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</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a><span class="k">def</span><span class="w"> </span><span class="nf">unnest_generate_series</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a><span class="w"> </span><span class="sd">"""Unnests GENERATE_SERIES or SEQUENCE table references."""</span>
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</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="n">this</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span>
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</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GenerateSeries</span><span class="p">):</span>
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</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="n">unnest</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">this</span><span class="p">])</span>
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</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span>
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</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">alias</span><span class="o">=</span><span class="s2">"_u"</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">expression</span><span class="o">.</span><span class="n">alias</span><span class="p">],</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a>
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</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="k">return</span> <span class="n">unnest</span>
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</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a>
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</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a>
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</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a>
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</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a><span class="k">def</span><span class="w"> </span><span class="nf">unalias_group</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a><span class="w"> </span><span class="sd">"""</span>
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</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a><span class="sd"> Replace references to select aliases in GROUP BY clauses.</span>
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</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a>
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</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a><span class="sd"> Example:</span>
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</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a><span class="sd"> >>> import sqlglot</span>
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</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a><span class="sd"> >>> sqlglot.parse_one("SELECT a AS b FROM x GROUP BY b").transform(unalias_group).sql()</span>
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</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a><span class="sd"> 'SELECT a AS b FROM x GROUP BY 1'</span>
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</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a>
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</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a><span class="sd"> Args:</span>
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</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a><span class="sd"> expression: the expression that will be transformed.</span>
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</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a>
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</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a><span class="sd"> Returns:</span>
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|
</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a><span class="sd"> The transformed expression.</span>
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</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a><span class="sd"> """</span>
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</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Group</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
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</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="n">aliased_selects</span> <span class="o">=</span> <span class="p">{</span>
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</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="n">e</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> <span class="n">i</span>
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</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">e</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">expressions</span><span class="p">,</span> <span class="n">start</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
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</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span>
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</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="p">}</span>
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</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a>
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</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="k">for</span> <span class="n">group_by</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span>
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</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="k">if</span> <span class="p">(</span>
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</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">group_by</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span>
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</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">group_by</span><span class="o">.</span><span class="n">table</span>
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</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="ow">and</span> <span class="n">group_by</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">aliased_selects</span>
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|
</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="p">):</span>
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</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="n">group_by</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">aliased_selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">group_by</span><span class="o">.</span><span class="n">name</span><span class="p">)))</span>
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</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a>
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|
</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> <span class="k">return</span> <span class="n">expression</span>
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|
</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a>
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</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a>
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</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a><span class="k">def</span><span class="w"> </span><span class="nf">eliminate_distinct_on</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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|
</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a><span class="sd"> Convert SELECT DISTINCT ON statements to a subquery with a window function.</span>
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|
</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a>
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</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a><span class="sd"> This is useful for dialects that don't support SELECT DISTINCT ON but support window functions.</span>
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|
</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a>
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|
</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a><span class="sd"> Args:</span>
|
|
</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a><span class="sd"> expression: the expression that will be transformed.</span>
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|
</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a>
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|
</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a><span class="sd"> Returns:</span>
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|
</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a><span class="sd"> The transformed expression.</span>
|
|
</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a><span class="sd"> """</span>
|
|
</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="k">if</span> <span class="p">(</span>
|
|
</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span>
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</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"distinct"</span><span class="p">)</span>
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</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"distinct"</span><span class="p">]</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">),</span> <span class="n">exp</span><span class="o">.</span><span class="n">Tuple</span><span class="p">)</span>
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|
</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="p">):</span>
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|
</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="n">row_number_window_alias</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">,</span> <span class="s2">"_row_number"</span><span class="p">)</span>
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|
</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a>
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</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="n">distinct_cols</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"distinct"</span><span class="p">]</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"on"</span><span class="p">]</span><span class="o">.</span><span class="n">expressions</span>
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</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="n">window</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">RowNumber</span><span class="p">(),</span> <span class="n">partition_by</span><span class="o">=</span><span class="n">distinct_cols</span><span class="p">)</span>
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|
</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a>
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</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">)</span>
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</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="k">if</span> <span class="n">order</span><span class="p">:</span>
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|
</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="n">window</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">order</span><span class="o">.</span><span class="n">pop</span><span class="p">())</span>
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|
</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="k">else</span><span class="p">:</span>
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|
</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="n">window</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">c</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">distinct_cols</span><span class="p">]))</span>
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|
</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a>
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</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="n">window</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">window</span><span class="p">,</span> <span class="n">row_number_window_alias</span><span class="p">)</span>
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|
</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">window</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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|
</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a>
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</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> <span class="c1"># We add aliases to the projections so that we can safely reference them in the outer query</span>
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</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="n">new_selects</span> <span class="o">=</span> <span class="p">[]</span>
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|
</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> <span class="n">taken_names</span> <span class="o">=</span> <span class="p">{</span><span class="n">row_number_window_alias</span><span class="p">}</span>
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</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">[:</span><span class="o">-</span><span class="mi">1</span><span class="p">]:</span>
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</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> <span class="k">if</span> <span class="n">select</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span>
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|
</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="n">new_selects</span> <span class="o">=</span> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Star</span><span class="p">()]</span>
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|
</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> <span class="k">break</span>
|
|
</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a>
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|
</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span>
|
|
</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken_names</span><span class="p">,</span> <span class="n">select</span><span class="o">.</span><span class="n">output_name</span> <span class="ow">or</span> <span class="s2">"_col"</span><span class="p">)</span>
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</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> <span class="n">quoted</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"quoted"</span><span class="p">)</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">else</span> <span class="kc">None</span>
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|
</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">alias</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="n">quoted</span><span class="p">))</span>
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</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a>
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</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> <span class="n">taken_names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">output_name</span><span class="p">)</span>
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|
</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a> <span class="n">new_selects</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">])</span>
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</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a>
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</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> <span class="k">return</span> <span class="p">(</span>
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</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">new_selects</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> <span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="s2">"_t"</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> <span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">row_number_window_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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|
</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> <span class="p">)</span>
|
|
</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a>
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|
</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> <span class="k">return</span> <span class="n">expression</span>
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|
</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a>
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</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a>
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</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a><span class="k">def</span><span class="w"> </span><span class="nf">eliminate_qualify</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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|
</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a><span class="w"> </span><span class="sd">"""</span>
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|
</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a><span class="sd"> Convert SELECT statements that contain the QUALIFY clause into subqueries, filtered equivalently.</span>
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</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a>
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</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a><span class="sd"> The idea behind this transformation can be seen in Snowflake's documentation for QUALIFY:</span>
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|
</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a><span class="sd"> https://docs.snowflake.com/en/sql-reference/constructs/qualify</span>
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</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a>
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</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a><span class="sd"> Some dialects don't support window functions in the WHERE clause, so we need to include them as</span>
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|
</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a><span class="sd"> projections in the subquery, in order to refer to them in the outer filter using aliases. Also,</span>
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</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a><span class="sd"> if a column is referenced in the QUALIFY clause but is not selected, we need to include it too,</span>
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</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a><span class="sd"> otherwise we won't be able to refer to it in the outer query's WHERE clause. Finally, if a</span>
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</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a><span class="sd"> newly aliased projection is referenced in the QUALIFY clause, it will be replaced by the</span>
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</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a><span class="sd"> corresponding expression to avoid creating invalid column references.</span>
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</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a><span class="sd"> """</span>
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</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"qualify"</span><span class="p">):</span>
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</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a> <span class="n">taken</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">)</span>
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</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span>
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|
</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span>
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</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="p">,</span> <span class="s2">"_c"</span><span class="p">)</span>
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</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">alias</span><span class="p">))</span>
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</span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> <span class="n">taken</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span>
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|
</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a>
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</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_select_alias_or_name</span><span class="p">(</span><span class="n">select</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span> <span class="o">|</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">:</span>
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|
</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a> <span class="n">alias_or_name</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span>
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|
</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span>
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|
</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">):</span>
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</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="n">identifier</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"quoted"</span><span class="p">))</span>
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|
</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a> <span class="k">return</span> <span class="n">alias_or_name</span>
|
|
</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a>
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|
</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a> <span class="n">outer_selects</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="nb">list</span><span class="p">(</span><span class="nb">map</span><span class="p">(</span><span class="n">_select_alias_or_name</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">)))</span>
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|
</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a> <span class="n">qualify_filters</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"qualify"</span><span class="p">]</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span><span class="o">.</span><span class="n">this</span>
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|
</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="n">expression_by_alias</span> <span class="o">=</span> <span class="p">{</span>
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|
</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="n">select</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">selects</span>
|
|
</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span>
|
|
</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="p">}</span>
|
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</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a>
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</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="n">select_candidates</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Window</span> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">is_star</span> <span class="k">else</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span>
|
|
</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> <span class="k">for</span> <span class="n">select_candidate</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="n">qualify_filters</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">select_candidates</span><span class="p">)):</span>
|
|
</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select_candidate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">):</span>
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|
</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="k">if</span> <span class="n">expression_by_alias</span><span class="p">:</span>
|
|
</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">select_candidate</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span>
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|
</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="n">expr</span> <span class="o">=</span> <span class="n">expression_by_alias</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
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</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="k">if</span> <span class="n">expr</span><span class="p">:</span>
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|
</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> <span class="n">column</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">expr</span><span class="p">)</span>
|
|
</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a>
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</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">,</span> <span class="s2">"_w"</span><span class="p">)</span>
|
|
</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select_candidate</span><span class="p">,</span> <span class="n">alias</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span>
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</span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a>
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|
</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select_candidate</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Qualify</span><span class="p">):</span>
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</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> <span class="n">qualify_filters</span> <span class="o">=</span> <span class="n">column</span>
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|
</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> <span class="n">select_candidate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">)</span>
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</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a> <span class="k">elif</span> <span class="n">select_candidate</span><span class="o">.</span><span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">:</span>
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|
</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">select_candidate</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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|
</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a>
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</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a> <span class="k">return</span> <span class="n">outer_selects</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="n">alias</span><span class="o">=</span><span class="s2">"_t"</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span><span class="o">.</span><span class="n">where</span><span class="p">(</span>
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|
</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a> <span class="n">qualify_filters</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span>
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|
</span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a> <span class="p">)</span>
|
|
</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a>
|
|
</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a>
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|
</span><span id="L-286"><a href="#L-286"><span class="linenos">286</span></a>
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|
</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a><span class="k">def</span><span class="w"> </span><span class="nf">remove_precision_parameterized_types</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a><span class="sd"> Some dialects only allow the precision for parameterized types to be defined in the DDL and not in</span>
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|
</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a><span class="sd"> other expressions. This transforms removes the precision from parameterized types in expressions.</span>
|
|
</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a><span class="sd"> """</span>
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</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">):</span>
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</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> <span class="n">node</span><span class="o">.</span><span class="n">set</span><span class="p">(</span>
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</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> <span class="s2">"expressions"</span><span class="p">,</span> <span class="p">[</span><span class="n">e</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">expressions</span> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataTypeParam</span><span class="p">)]</span>
|
|
</span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a> <span class="p">)</span>
|
|
</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a>
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|
</span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a>
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</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a>
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</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a><span class="k">def</span><span class="w"> </span><span class="nf">unqualify_unnest</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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|
</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a><span class="w"> </span><span class="sd">"""Remove references to unnest table aliases, added by the optimizer's qualify_columns step."""</span>
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|
</span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a> <span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.optimizer.scope</span><span class="w"> </span><span class="kn">import</span> <span class="n">find_all_in_scope</span>
|
|
</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a>
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|
</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
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|
</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a> <span class="n">unnest_aliases</span> <span class="o">=</span> <span class="p">{</span>
|
|
</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a> <span class="n">unnest</span><span class="o">.</span><span class="n">alias</span>
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|
</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a> <span class="k">for</span> <span class="n">unnest</span> <span class="ow">in</span> <span class="n">find_all_in_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">)</span>
|
|
</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnest</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">))</span>
|
|
</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a> <span class="p">}</span>
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|
</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a> <span class="k">if</span> <span class="n">unnest_aliases</span><span class="p">:</span>
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|
</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span>
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|
</span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="ow">in</span> <span class="n">unnest_aliases</span><span class="p">:</span>
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|
</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
|
|
</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> <span class="k">elif</span> <span class="n">column</span><span class="o">.</span><span class="n">db</span> <span class="ow">in</span> <span class="n">unnest_aliases</span><span class="p">:</span>
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</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"db"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
|
|
</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a>
|
|
</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a>
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|
</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a>
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|
</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a><span class="k">def</span><span class="w"> </span><span class="nf">unnest_to_explode</span><span class="p">(</span>
|
|
</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">,</span>
|
|
</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> <span class="n">unnest_using_arrays_zip</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">,</span>
|
|
</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a><span class="w"> </span><span class="sd">"""Convert cross join unnest into lateral view explode."""</span>
|
|
</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a>
|
|
</span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_unnest_zip_exprs</span><span class="p">(</span>
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|
</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> <span class="n">u</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">,</span> <span class="n">unnest_exprs</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">has_multi_expr</span><span class="p">:</span> <span class="nb">bool</span>
|
|
</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a> <span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
|
|
</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a> <span class="k">if</span> <span class="n">has_multi_expr</span><span class="p">:</span>
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|
</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">unnest_using_arrays_zip</span><span class="p">:</span>
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|
</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a> <span class="k">raise</span> <span class="n">UnsupportedError</span><span class="p">(</span><span class="s2">"Cannot transpile UNNEST with multiple input arrays"</span><span class="p">)</span>
|
|
</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a>
|
|
</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> <span class="c1"># Use INLINE(ARRAYS_ZIP(...)) for multiple expressions</span>
|
|
</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> <span class="n">zip_exprs</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span>
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|
</span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Anonymous</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="s2">"ARRAYS_ZIP"</span><span class="p">,</span> <span class="n">expressions</span><span class="o">=</span><span class="n">unnest_exprs</span><span class="p">)</span>
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|
</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="p">]</span>
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|
</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> <span class="n">u</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">zip_exprs</span><span class="p">)</span>
|
|
</span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a> <span class="k">return</span> <span class="n">zip_exprs</span>
|
|
</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a> <span class="k">return</span> <span class="n">unnest_exprs</span>
|
|
</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a>
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|
</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_udtf_type</span><span class="p">(</span><span class="n">u</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">,</span> <span class="n">has_multi_expr</span><span class="p">:</span> <span class="nb">bool</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Type</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Func</span><span class="p">]:</span>
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</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a> <span class="k">if</span> <span class="n">u</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"offset"</span><span class="p">):</span>
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|
</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Posexplode</span>
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|
</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Inline</span> <span class="k">if</span> <span class="n">has_multi_expr</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">Explode</span>
|
|
</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a>
|
|
</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
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</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span>
|
|
</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a>
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|
</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> <span class="k">if</span> <span class="n">from_</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">):</span>
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|
</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> <span class="n">unnest</span> <span class="o">=</span> <span class="n">from_</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span>
|
|
</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> <span class="n">exprs</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span>
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|
</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a> <span class="n">has_multi_expr</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">exprs</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span>
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</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> <span class="n">this</span><span class="p">,</span> <span class="o">*</span><span class="n">expressions</span> <span class="o">=</span> <span class="n">_unnest_zip_exprs</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">exprs</span><span class="p">,</span> <span class="n">has_multi_expr</span><span class="p">)</span>
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|
</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a>
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|
</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a> <span class="n">unnest</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span>
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</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">(</span>
|
|
</span><span id="L-358"><a href="#L-358"><span class="linenos">358</span></a> <span class="n">this</span><span class="o">=</span><span class="n">_udtf_type</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">has_multi_expr</span><span class="p">)(</span>
|
|
</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a> <span class="n">this</span><span class="o">=</span><span class="n">this</span><span class="p">,</span>
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|
</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a> <span class="n">expressions</span><span class="o">=</span><span class="n">expressions</span><span class="p">,</span>
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|
</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="p">),</span>
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|
</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">alias</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">columns</span><span class="o">=</span><span class="n">alias</span><span class="o">.</span><span class="n">columns</span><span class="p">)</span> <span class="k">if</span> <span class="n">alias</span> <span class="k">else</span> <span class="kc">None</span><span class="p">,</span>
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|
</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> <span class="p">)</span>
|
|
</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> <span class="p">)</span>
|
|
</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a>
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</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]</span>
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|
</span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="n">joins</span><span class="p">):</span>
|
|
</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> <span class="n">join_expr</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a>
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|
</span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a> <span class="n">is_lateral</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">join_expr</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Lateral</span><span class="p">)</span>
|
|
</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a>
|
|
</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a> <span class="n">unnest</span> <span class="o">=</span> <span class="n">join_expr</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="n">is_lateral</span> <span class="k">else</span> <span class="n">join_expr</span>
|
|
</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a>
|
|
</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">):</span>
|
|
</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a> <span class="k">if</span> <span class="n">is_lateral</span><span class="p">:</span>
|
|
</span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">join_expr</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span>
|
|
</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span>
|
|
</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a> <span class="n">exprs</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span>
|
|
</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a> <span class="c1"># The number of unnest.expressions will be changed by _unnest_zip_exprs, we need to record it here</span>
|
|
</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> <span class="n">has_multi_expr</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">exprs</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span>
|
|
</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="n">exprs</span> <span class="o">=</span> <span class="n">_unnest_zip_exprs</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">exprs</span><span class="p">,</span> <span class="n">has_multi_expr</span><span class="p">)</span>
|
|
</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a>
|
|
</span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a> <span class="n">joins</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">join</span><span class="p">)</span>
|
|
</span><span id="L-385"><a href="#L-385"><span class="linenos">385</span></a>
|
|
</span><span id="L-386"><a href="#L-386"><span class="linenos">386</span></a> <span class="n">alias_cols</span> <span class="o">=</span> <span class="n">alias</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">alias</span> <span class="k">else</span> <span class="p">[]</span>
|
|
</span><span id="L-387"><a href="#L-387"><span class="linenos">387</span></a>
|
|
</span><span id="L-388"><a href="#L-388"><span class="linenos">388</span></a> <span class="c1"># # Handle UNNEST to LATERAL VIEW EXPLODE: Exception is raised when there are 0 or > 2 aliases</span>
|
|
</span><span id="L-389"><a href="#L-389"><span class="linenos">389</span></a> <span class="c1"># Spark LATERAL VIEW EXPLODE requires single alias for array/struct and two for Map type column unlike unnest in trino/presto which can take an arbitrary amount.</span>
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|
</span><span id="L-390"><a href="#L-390"><span class="linenos">390</span></a> <span class="c1"># Refs: https://spark.apache.org/docs/latest/sql-ref-syntax-qry-select-lateral-view.html</span>
|
|
</span><span id="L-391"><a href="#L-391"><span class="linenos">391</span></a>
|
|
</span><span id="L-392"><a href="#L-392"><span class="linenos">392</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">has_multi_expr</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">alias_cols</span><span class="p">)</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">):</span>
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|
</span><span id="L-393"><a href="#L-393"><span class="linenos">393</span></a> <span class="k">raise</span> <span class="n">UnsupportedError</span><span class="p">(</span>
|
|
</span><span id="L-394"><a href="#L-394"><span class="linenos">394</span></a> <span class="s2">"CROSS JOIN UNNEST to LATERAL VIEW EXPLODE transformation requires explicit column aliases"</span>
|
|
</span><span id="L-395"><a href="#L-395"><span class="linenos">395</span></a> <span class="p">)</span>
|
|
</span><span id="L-396"><a href="#L-396"><span class="linenos">396</span></a>
|
|
</span><span id="L-397"><a href="#L-397"><span class="linenos">397</span></a> <span class="k">for</span> <span class="n">e</span><span class="p">,</span> <span class="n">column</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">exprs</span><span class="p">,</span> <span class="n">alias_cols</span><span class="p">):</span>
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|
</span><span id="L-398"><a href="#L-398"><span class="linenos">398</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
|
|
</span><span id="L-399"><a href="#L-399"><span class="linenos">399</span></a> <span class="s2">"laterals"</span><span class="p">,</span>
|
|
</span><span id="L-400"><a href="#L-400"><span class="linenos">400</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Lateral</span><span class="p">(</span>
|
|
</span><span id="L-401"><a href="#L-401"><span class="linenos">401</span></a> <span class="n">this</span><span class="o">=</span><span class="n">_udtf_type</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">has_multi_expr</span><span class="p">)(</span><span class="n">this</span><span class="o">=</span><span class="n">e</span><span class="p">),</span>
|
|
</span><span id="L-402"><a href="#L-402"><span class="linenos">402</span></a> <span class="n">view</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
|
|
</span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span>
|
|
</span><span id="L-404"><a href="#L-404"><span class="linenos">404</span></a> <span class="n">this</span><span class="o">=</span><span class="n">alias</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="c1"># type: ignore</span>
|
|
</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a> <span class="n">columns</span><span class="o">=</span><span class="n">alias_cols</span><span class="p">,</span>
|
|
</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a> <span class="p">),</span>
|
|
</span><span id="L-407"><a href="#L-407"><span class="linenos">407</span></a> <span class="p">),</span>
|
|
</span><span id="L-408"><a href="#L-408"><span class="linenos">408</span></a> <span class="p">)</span>
|
|
</span><span id="L-409"><a href="#L-409"><span class="linenos">409</span></a>
|
|
</span><span id="L-410"><a href="#L-410"><span class="linenos">410</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-411"><a href="#L-411"><span class="linenos">411</span></a>
|
|
</span><span id="L-412"><a href="#L-412"><span class="linenos">412</span></a>
|
|
</span><span id="L-413"><a href="#L-413"><span class="linenos">413</span></a><span class="k">def</span><span class="w"> </span><span class="nf">explode_projection_to_unnest</span><span class="p">(</span>
|
|
</span><span id="L-414"><a href="#L-414"><span class="linenos">414</span></a> <span class="n">index_offset</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span>
|
|
</span><span id="L-415"><a href="#L-415"><span class="linenos">415</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
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</span><span id="L-416"><a href="#L-416"><span class="linenos">416</span></a><span class="w"> </span><span class="sd">"""Convert explode/posexplode projections into unnests."""</span>
|
|
</span><span id="L-417"><a href="#L-417"><span class="linenos">417</span></a>
|
|
</span><span id="L-418"><a href="#L-418"><span class="linenos">418</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_explode_projection_to_unnest</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-419"><a href="#L-419"><span class="linenos">419</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
|
|
</span><span id="L-420"><a href="#L-420"><span class="linenos">420</span></a> <span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.optimizer.scope</span><span class="w"> </span><span class="kn">import</span> <span class="n">Scope</span>
|
|
</span><span id="L-421"><a href="#L-421"><span class="linenos">421</span></a>
|
|
</span><span id="L-422"><a href="#L-422"><span class="linenos">422</span></a> <span class="n">taken_select_names</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">)</span>
|
|
</span><span id="L-423"><a href="#L-423"><span class="linenos">423</span></a> <span class="n">taken_source_names</span> <span class="o">=</span> <span class="p">{</span><span class="n">name</span> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">_</span> <span class="ow">in</span> <span class="n">Scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span><span class="o">.</span><span class="n">references</span><span class="p">}</span>
|
|
</span><span id="L-424"><a href="#L-424"><span class="linenos">424</span></a>
|
|
</span><span id="L-425"><a href="#L-425"><span class="linenos">425</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">new_name</span><span class="p">(</span><span class="n">names</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span>
|
|
</span><span id="L-426"><a href="#L-426"><span class="linenos">426</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">names</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span>
|
|
</span><span id="L-427"><a href="#L-427"><span class="linenos">427</span></a> <span class="n">names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
|
|
</span><span id="L-428"><a href="#L-428"><span class="linenos">428</span></a> <span class="k">return</span> <span class="n">name</span>
|
|
</span><span id="L-429"><a href="#L-429"><span class="linenos">429</span></a>
|
|
</span><span id="L-430"><a href="#L-430"><span class="linenos">430</span></a> <span class="n">arrays</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">]</span> <span class="o">=</span> <span class="p">[]</span>
|
|
</span><span id="L-431"><a href="#L-431"><span class="linenos">431</span></a> <span class="n">series_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span>
|
|
</span><span id="L-432"><a href="#L-432"><span class="linenos">432</span></a> <span class="n">series</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span>
|
|
</span><span id="L-433"><a href="#L-433"><span class="linenos">433</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span>
|
|
</span><span id="L-434"><a href="#L-434"><span class="linenos">434</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">GenerateSeries</span><span class="p">(</span><span class="n">start</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">index_offset</span><span class="p">))]</span>
|
|
</span><span id="L-435"><a href="#L-435"><span class="linenos">435</span></a> <span class="p">),</span>
|
|
</span><span id="L-436"><a href="#L-436"><span class="linenos">436</span></a> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_source_names</span><span class="p">,</span> <span class="s2">"_u"</span><span class="p">),</span>
|
|
</span><span id="L-437"><a href="#L-437"><span class="linenos">437</span></a> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">series_alias</span><span class="p">],</span>
|
|
</span><span id="L-438"><a href="#L-438"><span class="linenos">438</span></a> <span class="p">)</span>
|
|
</span><span id="L-439"><a href="#L-439"><span class="linenos">439</span></a>
|
|
</span><span id="L-440"><a href="#L-440"><span class="linenos">440</span></a> <span class="c1"># we use list here because expression.selects is mutated inside the loop</span>
|
|
</span><span id="L-441"><a href="#L-441"><span class="linenos">441</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
|
</span><span id="L-442"><a href="#L-442"><span class="linenos">442</span></a> <span class="n">explode</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Explode</span><span class="p">)</span>
|
|
</span><span id="L-443"><a href="#L-443"><span class="linenos">443</span></a>
|
|
</span><span id="L-444"><a href="#L-444"><span class="linenos">444</span></a> <span class="k">if</span> <span class="n">explode</span><span class="p">:</span>
|
|
</span><span id="L-445"><a href="#L-445"><span class="linenos">445</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="s2">""</span>
|
|
</span><span id="L-446"><a href="#L-446"><span class="linenos">446</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="s2">""</span>
|
|
</span><span id="L-447"><a href="#L-447"><span class="linenos">447</span></a>
|
|
</span><span id="L-448"><a href="#L-448"><span class="linenos">448</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span>
|
|
</span><span id="L-449"><a href="#L-449"><span class="linenos">449</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span>
|
|
</span><span id="L-450"><a href="#L-450"><span class="linenos">450</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span>
|
|
</span><span id="L-451"><a href="#L-451"><span class="linenos">451</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Aliases</span><span class="p">):</span>
|
|
</span><span id="L-452"><a href="#L-452"><span class="linenos">452</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">aliases</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
|
|
</span><span id="L-453"><a href="#L-453"><span class="linenos">453</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">aliases</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
|
|
</span><span id="L-454"><a href="#L-454"><span class="linenos">454</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="s2">""</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span>
|
|
</span><span id="L-455"><a href="#L-455"><span class="linenos">455</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-456"><a href="#L-456"><span class="linenos">456</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="s2">""</span><span class="p">))</span>
|
|
</span><span id="L-457"><a href="#L-457"><span class="linenos">457</span></a> <span class="n">explode</span> <span class="o">=</span> <span class="n">alias</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Explode</span><span class="p">)</span>
|
|
</span><span id="L-458"><a href="#L-458"><span class="linenos">458</span></a> <span class="k">assert</span> <span class="n">explode</span>
|
|
</span><span id="L-459"><a href="#L-459"><span class="linenos">459</span></a>
|
|
</span><span id="L-460"><a href="#L-460"><span class="linenos">460</span></a> <span class="n">is_posexplode</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Posexplode</span><span class="p">)</span>
|
|
</span><span id="L-461"><a href="#L-461"><span class="linenos">461</span></a> <span class="n">explode_arg</span> <span class="o">=</span> <span class="n">explode</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="L-462"><a href="#L-462"><span class="linenos">462</span></a>
|
|
</span><span id="L-463"><a href="#L-463"><span class="linenos">463</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ExplodeOuter</span><span class="p">):</span>
|
|
</span><span id="L-464"><a href="#L-464"><span class="linenos">464</span></a> <span class="n">bracket</span> <span class="o">=</span> <span class="n">explode_arg</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
|
|
</span><span id="L-465"><a href="#L-465"><span class="linenos">465</span></a> <span class="n">bracket</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"safe"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
|
|
</span><span id="L-466"><a href="#L-466"><span class="linenos">466</span></a> <span class="n">bracket</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"offset"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
|
|
</span><span id="L-467"><a href="#L-467"><span class="linenos">467</span></a> <span class="n">explode_arg</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">func</span><span class="p">(</span>
|
|
</span><span id="L-468"><a href="#L-468"><span class="linenos">468</span></a> <span class="s2">"IF"</span><span class="p">,</span>
|
|
</span><span id="L-469"><a href="#L-469"><span class="linenos">469</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">func</span><span class="p">(</span>
|
|
</span><span id="L-470"><a href="#L-470"><span class="linenos">470</span></a> <span class="s2">"ARRAY_SIZE"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">func</span><span class="p">(</span><span class="s2">"COALESCE"</span><span class="p">,</span> <span class="n">explode_arg</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Array</span><span class="p">())</span>
|
|
</span><span id="L-471"><a href="#L-471"><span class="linenos">471</span></a> <span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="mi">0</span><span class="p">),</span>
|
|
</span><span id="L-472"><a href="#L-472"><span class="linenos">472</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">array</span><span class="p">(</span><span class="n">bracket</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span>
|
|
</span><span id="L-473"><a href="#L-473"><span class="linenos">473</span></a> <span class="n">explode_arg</span><span class="p">,</span>
|
|
</span><span id="L-474"><a href="#L-474"><span class="linenos">474</span></a> <span class="p">)</span>
|
|
</span><span id="L-475"><a href="#L-475"><span class="linenos">475</span></a>
|
|
</span><span id="L-476"><a href="#L-476"><span class="linenos">476</span></a> <span class="c1"># This ensures that we won't use [POS]EXPLODE's argument as a new selection</span>
|
|
</span><span id="L-477"><a href="#L-477"><span class="linenos">477</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode_arg</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span>
|
|
</span><span id="L-478"><a href="#L-478"><span class="linenos">478</span></a> <span class="n">taken_select_names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">output_name</span><span class="p">)</span>
|
|
</span><span id="L-479"><a href="#L-479"><span class="linenos">479</span></a>
|
|
</span><span id="L-480"><a href="#L-480"><span class="linenos">480</span></a> <span class="n">unnest_source_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_source_names</span><span class="p">,</span> <span class="s2">"_u"</span><span class="p">)</span>
|
|
</span><span id="L-481"><a href="#L-481"><span class="linenos">481</span></a>
|
|
</span><span id="L-482"><a href="#L-482"><span class="linenos">482</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">explode_alias</span><span class="p">:</span>
|
|
</span><span id="L-483"><a href="#L-483"><span class="linenos">483</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"col"</span><span class="p">)</span>
|
|
</span><span id="L-484"><a href="#L-484"><span class="linenos">484</span></a>
|
|
</span><span id="L-485"><a href="#L-485"><span class="linenos">485</span></a> <span class="k">if</span> <span class="n">is_posexplode</span><span class="p">:</span>
|
|
</span><span id="L-486"><a href="#L-486"><span class="linenos">486</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span>
|
|
</span><span id="L-487"><a href="#L-487"><span class="linenos">487</span></a>
|
|
</span><span id="L-488"><a href="#L-488"><span class="linenos">488</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">pos_alias</span><span class="p">:</span>
|
|
</span><span id="L-489"><a href="#L-489"><span class="linenos">489</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span>
|
|
</span><span id="L-490"><a href="#L-490"><span class="linenos">490</span></a>
|
|
</span><span id="L-491"><a href="#L-491"><span class="linenos">491</span></a> <span class="n">alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">explode_alias</span><span class="p">))</span>
|
|
</span><span id="L-492"><a href="#L-492"><span class="linenos">492</span></a>
|
|
</span><span id="L-493"><a href="#L-493"><span class="linenos">493</span></a> <span class="n">series_table_alias</span> <span class="o">=</span> <span class="n">series</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="L-494"><a href="#L-494"><span class="linenos">494</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">If</span><span class="p">(</span>
|
|
</span><span id="L-495"><a href="#L-495"><span class="linenos">495</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">series_table_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span>
|
|
</span><span id="L-496"><a href="#L-496"><span class="linenos">496</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">unnest_source_alias</span><span class="p">)</span>
|
|
</span><span id="L-497"><a href="#L-497"><span class="linenos">497</span></a> <span class="p">),</span>
|
|
</span><span id="L-498"><a href="#L-498"><span class="linenos">498</span></a> <span class="n">true</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">explode_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">unnest_source_alias</span><span class="p">),</span>
|
|
</span><span id="L-499"><a href="#L-499"><span class="linenos">499</span></a> <span class="p">)</span>
|
|
</span><span id="L-500"><a href="#L-500"><span class="linenos">500</span></a>
|
|
</span><span id="L-501"><a href="#L-501"><span class="linenos">501</span></a> <span class="n">explode</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">)</span>
|
|
</span><span id="L-502"><a href="#L-502"><span class="linenos">502</span></a>
|
|
</span><span id="L-503"><a href="#L-503"><span class="linenos">503</span></a> <span class="k">if</span> <span class="n">is_posexplode</span><span class="p">:</span>
|
|
</span><span id="L-504"><a href="#L-504"><span class="linenos">504</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span>
|
|
</span><span id="L-505"><a href="#L-505"><span class="linenos">505</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span>
|
|
</span><span id="L-506"><a href="#L-506"><span class="linenos">506</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span>
|
|
</span><span id="L-507"><a href="#L-507"><span class="linenos">507</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">If</span><span class="p">(</span>
|
|
</span><span id="L-508"><a href="#L-508"><span class="linenos">508</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">series_table_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span>
|
|
</span><span id="L-509"><a href="#L-509"><span class="linenos">509</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">unnest_source_alias</span><span class="p">)</span>
|
|
</span><span id="L-510"><a href="#L-510"><span class="linenos">510</span></a> <span class="p">),</span>
|
|
</span><span id="L-511"><a href="#L-511"><span class="linenos">511</span></a> <span class="n">true</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">unnest_source_alias</span><span class="p">),</span>
|
|
</span><span id="L-512"><a href="#L-512"><span class="linenos">512</span></a> <span class="p">)</span><span class="o">.</span><span class="n">as_</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span>
|
|
</span><span id="L-513"><a href="#L-513"><span class="linenos">513</span></a> <span class="p">)</span>
|
|
</span><span id="L-514"><a href="#L-514"><span class="linenos">514</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">expressions</span><span class="p">)</span>
|
|
</span><span id="L-515"><a href="#L-515"><span class="linenos">515</span></a>
|
|
</span><span id="L-516"><a href="#L-516"><span class="linenos">516</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">arrays</span><span class="p">:</span>
|
|
</span><span id="L-517"><a href="#L-517"><span class="linenos">517</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">):</span>
|
|
</span><span id="L-518"><a href="#L-518"><span class="linenos">518</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">series</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">join_type</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">)</span>
|
|
</span><span id="L-519"><a href="#L-519"><span class="linenos">519</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-520"><a href="#L-520"><span class="linenos">520</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">series</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
|
</span><span id="L-521"><a href="#L-521"><span class="linenos">521</span></a>
|
|
</span><span id="L-522"><a href="#L-522"><span class="linenos">522</span></a> <span class="n">size</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Condition</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">ArraySize</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span>
|
|
</span><span id="L-523"><a href="#L-523"><span class="linenos">523</span></a> <span class="n">arrays</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">size</span><span class="p">)</span>
|
|
</span><span id="L-524"><a href="#L-524"><span class="linenos">524</span></a>
|
|
</span><span id="L-525"><a href="#L-525"><span class="linenos">525</span></a> <span class="c1"># trino doesn't support left join unnest with on conditions</span>
|
|
</span><span id="L-526"><a href="#L-526"><span class="linenos">526</span></a> <span class="c1"># if it did, this would be much simpler</span>
|
|
</span><span id="L-527"><a href="#L-527"><span class="linenos">527</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">join</span><span class="p">(</span>
|
|
</span><span id="L-528"><a href="#L-528"><span class="linenos">528</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span>
|
|
</span><span id="L-529"><a href="#L-529"><span class="linenos">529</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span>
|
|
</span><span id="L-530"><a href="#L-530"><span class="linenos">530</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">copy</span><span class="p">()],</span>
|
|
</span><span id="L-531"><a href="#L-531"><span class="linenos">531</span></a> <span class="n">offset</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span>
|
|
</span><span id="L-532"><a href="#L-532"><span class="linenos">532</span></a> <span class="p">),</span>
|
|
</span><span id="L-533"><a href="#L-533"><span class="linenos">533</span></a> <span class="n">unnest_source_alias</span><span class="p">,</span>
|
|
</span><span id="L-534"><a href="#L-534"><span class="linenos">534</span></a> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">explode_alias</span><span class="p">],</span>
|
|
</span><span id="L-535"><a href="#L-535"><span class="linenos">535</span></a> <span class="p">),</span>
|
|
</span><span id="L-536"><a href="#L-536"><span class="linenos">536</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">,</span>
|
|
</span><span id="L-537"><a href="#L-537"><span class="linenos">537</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
|
|
</span><span id="L-538"><a href="#L-538"><span class="linenos">538</span></a> <span class="p">)</span>
|
|
</span><span id="L-539"><a href="#L-539"><span class="linenos">539</span></a>
|
|
</span><span id="L-540"><a href="#L-540"><span class="linenos">540</span></a> <span class="k">if</span> <span class="n">index_offset</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span>
|
|
</span><span id="L-541"><a href="#L-541"><span class="linenos">541</span></a> <span class="n">size</span> <span class="o">=</span> <span class="n">size</span> <span class="o">-</span> <span class="mi">1</span>
|
|
</span><span id="L-542"><a href="#L-542"><span class="linenos">542</span></a>
|
|
</span><span id="L-543"><a href="#L-543"><span class="linenos">543</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span>
|
|
</span><span id="L-544"><a href="#L-544"><span class="linenos">544</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">series_table_alias</span><span class="p">)</span>
|
|
</span><span id="L-545"><a href="#L-545"><span class="linenos">545</span></a> <span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">unnest_source_alias</span><span class="p">))</span>
|
|
</span><span id="L-546"><a href="#L-546"><span class="linenos">546</span></a> <span class="o">.</span><span class="n">or_</span><span class="p">(</span>
|
|
</span><span id="L-547"><a href="#L-547"><span class="linenos">547</span></a> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">series_table_alias</span><span class="p">)</span> <span class="o">></span> <span class="n">size</span><span class="p">)</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span>
|
|
</span><span id="L-548"><a href="#L-548"><span class="linenos">548</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">unnest_source_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">size</span><span class="p">)</span>
|
|
</span><span id="L-549"><a href="#L-549"><span class="linenos">549</span></a> <span class="p">)</span>
|
|
</span><span id="L-550"><a href="#L-550"><span class="linenos">550</span></a> <span class="p">),</span>
|
|
</span><span id="L-551"><a href="#L-551"><span class="linenos">551</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
|
|
</span><span id="L-552"><a href="#L-552"><span class="linenos">552</span></a> <span class="p">)</span>
|
|
</span><span id="L-553"><a href="#L-553"><span class="linenos">553</span></a>
|
|
</span><span id="L-554"><a href="#L-554"><span class="linenos">554</span></a> <span class="k">if</span> <span class="n">arrays</span><span class="p">:</span>
|
|
</span><span id="L-555"><a href="#L-555"><span class="linenos">555</span></a> <span class="n">end</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Condition</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Greatest</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">arrays</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">expressions</span><span class="o">=</span><span class="n">arrays</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span>
|
|
</span><span id="L-556"><a href="#L-556"><span class="linenos">556</span></a>
|
|
</span><span id="L-557"><a href="#L-557"><span class="linenos">557</span></a> <span class="k">if</span> <span class="n">index_offset</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span>
|
|
</span><span id="L-558"><a href="#L-558"><span class="linenos">558</span></a> <span class="n">end</span> <span class="o">=</span> <span class="n">end</span> <span class="o">-</span> <span class="p">(</span><span class="mi">1</span> <span class="o">-</span> <span class="n">index_offset</span><span class="p">)</span>
|
|
</span><span id="L-559"><a href="#L-559"><span class="linenos">559</span></a> <span class="n">series</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"end"</span><span class="p">,</span> <span class="n">end</span><span class="p">)</span>
|
|
</span><span id="L-560"><a href="#L-560"><span class="linenos">560</span></a>
|
|
</span><span id="L-561"><a href="#L-561"><span class="linenos">561</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-562"><a href="#L-562"><span class="linenos">562</span></a>
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|
</span><span id="L-563"><a href="#L-563"><span class="linenos">563</span></a> <span class="k">return</span> <span class="n">_explode_projection_to_unnest</span>
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|
</span><span id="L-564"><a href="#L-564"><span class="linenos">564</span></a>
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|
</span><span id="L-565"><a href="#L-565"><span class="linenos">565</span></a>
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</span><span id="L-566"><a href="#L-566"><span class="linenos">566</span></a><span class="k">def</span><span class="w"> </span><span class="nf">add_within_group_for_percentiles</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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|
</span><span id="L-567"><a href="#L-567"><span class="linenos">567</span></a><span class="w"> </span><span class="sd">"""Transforms percentiles by adding a WITHIN GROUP clause to them."""</span>
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|
</span><span id="L-568"><a href="#L-568"><span class="linenos">568</span></a> <span class="k">if</span> <span class="p">(</span>
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|
</span><span id="L-569"><a href="#L-569"><span class="linenos">569</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">PERCENTILES</span><span class="p">)</span>
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</span><span id="L-570"><a href="#L-570"><span class="linenos">570</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">)</span>
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</span><span id="L-571"><a href="#L-571"><span class="linenos">571</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span>
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|
</span><span id="L-572"><a href="#L-572"><span class="linenos">572</span></a> <span class="p">):</span>
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</span><span id="L-573"><a href="#L-573"><span class="linenos">573</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
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</span><span id="L-574"><a href="#L-574"><span class="linenos">574</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">pop</span><span class="p">())</span>
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|
</span><span id="L-575"><a href="#L-575"><span class="linenos">575</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">column</span><span class="p">)])</span>
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</span><span id="L-576"><a href="#L-576"><span class="linenos">576</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">order</span><span class="p">)</span>
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|
</span><span id="L-577"><a href="#L-577"><span class="linenos">577</span></a>
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|
</span><span id="L-578"><a href="#L-578"><span class="linenos">578</span></a> <span class="k">return</span> <span class="n">expression</span>
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|
</span><span id="L-579"><a href="#L-579"><span class="linenos">579</span></a>
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</span><span id="L-580"><a href="#L-580"><span class="linenos">580</span></a>
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|
</span><span id="L-581"><a href="#L-581"><span class="linenos">581</span></a><span class="k">def</span><span class="w"> </span><span class="nf">remove_within_group_for_percentiles</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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|
</span><span id="L-582"><a href="#L-582"><span class="linenos">582</span></a><span class="w"> </span><span class="sd">"""Transforms percentiles by getting rid of their corresponding WITHIN GROUP clause."""</span>
|
|
</span><span id="L-583"><a href="#L-583"><span class="linenos">583</span></a> <span class="k">if</span> <span class="p">(</span>
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|
</span><span id="L-584"><a href="#L-584"><span class="linenos">584</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">)</span>
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</span><span id="L-585"><a href="#L-585"><span class="linenos">585</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">PERCENTILES</span><span class="p">)</span>
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|
</span><span id="L-586"><a href="#L-586"><span class="linenos">586</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">)</span>
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|
</span><span id="L-587"><a href="#L-587"><span class="linenos">587</span></a> <span class="p">):</span>
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</span><span id="L-588"><a href="#L-588"><span class="linenos">588</span></a> <span class="n">quantile</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">this</span>
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</span><span id="L-589"><a href="#L-589"><span class="linenos">589</span></a> <span class="n">input_value</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">))</span><span class="o">.</span><span class="n">this</span>
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|
</span><span id="L-590"><a href="#L-590"><span class="linenos">590</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">ApproxQuantile</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">input_value</span><span class="p">,</span> <span class="n">quantile</span><span class="o">=</span><span class="n">quantile</span><span class="p">))</span>
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|
</span><span id="L-591"><a href="#L-591"><span class="linenos">591</span></a>
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|
</span><span id="L-592"><a href="#L-592"><span class="linenos">592</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-593"><a href="#L-593"><span class="linenos">593</span></a>
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|
</span><span id="L-594"><a href="#L-594"><span class="linenos">594</span></a>
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|
</span><span id="L-595"><a href="#L-595"><span class="linenos">595</span></a><span class="k">def</span><span class="w"> </span><span class="nf">add_recursive_cte_column_names</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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|
</span><span id="L-596"><a href="#L-596"><span class="linenos">596</span></a><span class="w"> </span><span class="sd">"""Uses projection output names in recursive CTE definitions to define the CTEs' columns."""</span>
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|
</span><span id="L-597"><a href="#L-597"><span class="linenos">597</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span>
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|
</span><span id="L-598"><a href="#L-598"><span class="linenos">598</span></a> <span class="n">next_name</span> <span class="o">=</span> <span class="n">name_sequence</span><span class="p">(</span><span class="s2">"_c_"</span><span class="p">)</span>
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|
</span><span id="L-599"><a href="#L-599"><span class="linenos">599</span></a>
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|
</span><span id="L-600"><a href="#L-600"><span class="linenos">600</span></a> <span class="k">for</span> <span class="n">cte</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span>
|
|
</span><span id="L-601"><a href="#L-601"><span class="linenos">601</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">cte</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span>
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|
</span><span id="L-602"><a href="#L-602"><span class="linenos">602</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="L-603"><a href="#L-603"><span class="linenos">603</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">SetOperation</span><span class="p">):</span>
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|
</span><span id="L-604"><a href="#L-604"><span class="linenos">604</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="L-605"><a href="#L-605"><span class="linenos">605</span></a>
|
|
</span><span id="L-606"><a href="#L-606"><span class="linenos">606</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span>
|
|
</span><span id="L-607"><a href="#L-607"><span class="linenos">607</span></a> <span class="s2">"columns"</span><span class="p">,</span>
|
|
</span><span id="L-608"><a href="#L-608"><span class="linenos">608</span></a> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">or</span> <span class="n">next_name</span><span class="p">())</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">query</span><span class="o">.</span><span class="n">selects</span><span class="p">],</span>
|
|
</span><span id="L-609"><a href="#L-609"><span class="linenos">609</span></a> <span class="p">)</span>
|
|
</span><span id="L-610"><a href="#L-610"><span class="linenos">610</span></a>
|
|
</span><span id="L-611"><a href="#L-611"><span class="linenos">611</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-612"><a href="#L-612"><span class="linenos">612</span></a>
|
|
</span><span id="L-613"><a href="#L-613"><span class="linenos">613</span></a>
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|
</span><span id="L-614"><a href="#L-614"><span class="linenos">614</span></a><span class="k">def</span><span class="w"> </span><span class="nf">epoch_cast_to_ts</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-615"><a href="#L-615"><span class="linenos">615</span></a><span class="w"> </span><span class="sd">"""Replace 'epoch' in casts by the equivalent date literal."""</span>
|
|
</span><span id="L-616"><a href="#L-616"><span class="linenos">616</span></a> <span class="k">if</span> <span class="p">(</span>
|
|
</span><span id="L-617"><a href="#L-617"><span class="linenos">617</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TryCast</span><span class="p">))</span>
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|
</span><span id="L-618"><a href="#L-618"><span class="linenos">618</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">name</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s2">"epoch"</span>
|
|
</span><span id="L-619"><a href="#L-619"><span class="linenos">619</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEMPORAL_TYPES</span>
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|
</span><span id="L-620"><a href="#L-620"><span class="linenos">620</span></a> <span class="p">):</span>
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|
</span><span id="L-621"><a href="#L-621"><span class="linenos">621</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">string</span><span class="p">(</span><span class="s2">"1970-01-01 00:00:00"</span><span class="p">))</span>
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|
</span><span id="L-622"><a href="#L-622"><span class="linenos">622</span></a>
|
|
</span><span id="L-623"><a href="#L-623"><span class="linenos">623</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-624"><a href="#L-624"><span class="linenos">624</span></a>
|
|
</span><span id="L-625"><a href="#L-625"><span class="linenos">625</span></a>
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|
</span><span id="L-626"><a href="#L-626"><span class="linenos">626</span></a><span class="k">def</span><span class="w"> </span><span class="nf">eliminate_semi_and_anti_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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|
</span><span id="L-627"><a href="#L-627"><span class="linenos">627</span></a><span class="w"> </span><span class="sd">"""Convert SEMI and ANTI joins into equivalent forms that use EXIST instead."""</span>
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|
</span><span id="L-628"><a href="#L-628"><span class="linenos">628</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
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|
</span><span id="L-629"><a href="#L-629"><span class="linenos">629</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span>
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</span><span id="L-630"><a href="#L-630"><span class="linenos">630</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span>
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|
</span><span id="L-631"><a href="#L-631"><span class="linenos">631</span></a> <span class="k">if</span> <span class="n">on</span> <span class="ow">and</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="ow">in</span> <span class="p">(</span><span class="s2">"SEMI"</span><span class="p">,</span> <span class="s2">"ANTI"</span><span class="p">):</span>
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|
</span><span id="L-632"><a href="#L-632"><span class="linenos">632</span></a> <span class="n">subquery</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">"1"</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="p">)</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">on</span><span class="p">)</span>
|
|
</span><span id="L-633"><a href="#L-633"><span class="linenos">633</span></a> <span class="n">exists</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">subquery</span><span class="p">)</span>
|
|
</span><span id="L-634"><a href="#L-634"><span class="linenos">634</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="o">==</span> <span class="s2">"ANTI"</span><span class="p">:</span>
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|
</span><span id="L-635"><a href="#L-635"><span class="linenos">635</span></a> <span class="n">exists</span> <span class="o">=</span> <span class="n">exists</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
|
</span><span id="L-636"><a href="#L-636"><span class="linenos">636</span></a>
|
|
</span><span id="L-637"><a href="#L-637"><span class="linenos">637</span></a> <span class="n">join</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
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|
</span><span id="L-638"><a href="#L-638"><span class="linenos">638</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exists</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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|
</span><span id="L-639"><a href="#L-639"><span class="linenos">639</span></a>
|
|
</span><span id="L-640"><a href="#L-640"><span class="linenos">640</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-641"><a href="#L-641"><span class="linenos">641</span></a>
|
|
</span><span id="L-642"><a href="#L-642"><span class="linenos">642</span></a>
|
|
</span><span id="L-643"><a href="#L-643"><span class="linenos">643</span></a><span class="k">def</span><span class="w"> </span><span class="nf">eliminate_full_outer_join</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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|
</span><span id="L-644"><a href="#L-644"><span class="linenos">644</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="L-645"><a href="#L-645"><span class="linenos">645</span></a><span class="sd"> Converts a query with a FULL OUTER join to a union of identical queries that</span>
|
|
</span><span id="L-646"><a href="#L-646"><span class="linenos">646</span></a><span class="sd"> use LEFT/RIGHT OUTER joins instead. This transformation currently only works</span>
|
|
</span><span id="L-647"><a href="#L-647"><span class="linenos">647</span></a><span class="sd"> for queries that have a single FULL OUTER join.</span>
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|
</span><span id="L-648"><a href="#L-648"><span class="linenos">648</span></a><span class="sd"> """</span>
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</span><span id="L-649"><a href="#L-649"><span class="linenos">649</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
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</span><span id="L-650"><a href="#L-650"><span class="linenos">650</span></a> <span class="n">full_outer_joins</span> <span class="o">=</span> <span class="p">[</span>
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</span><span id="L-651"><a href="#L-651"><span class="linenos">651</span></a> <span class="p">(</span><span class="n">index</span><span class="p">,</span> <span class="n">join</span><span class="p">)</span>
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</span><span id="L-652"><a href="#L-652"><span class="linenos">652</span></a> <span class="k">for</span> <span class="n">index</span><span class="p">,</span> <span class="n">join</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[])</span>
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</span><span id="L-653"><a href="#L-653"><span class="linenos">653</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">side</span> <span class="o">==</span> <span class="s2">"FULL"</span>
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</span><span id="L-654"><a href="#L-654"><span class="linenos">654</span></a> <span class="p">]</span>
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</span><span id="L-655"><a href="#L-655"><span class="linenos">655</span></a>
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</span><span id="L-656"><a href="#L-656"><span class="linenos">656</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">full_outer_joins</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
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</span><span id="L-657"><a href="#L-657"><span class="linenos">657</span></a> <span class="n">expression_copy</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
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</span><span id="L-658"><a href="#L-658"><span class="linenos">658</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"limit"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
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</span><span id="L-659"><a href="#L-659"><span class="linenos">659</span></a> <span class="n">index</span><span class="p">,</span> <span class="n">full_outer_join</span> <span class="o">=</span> <span class="n">full_outer_joins</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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</span><span id="L-660"><a href="#L-660"><span class="linenos">660</span></a>
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</span><span id="L-661"><a href="#L-661"><span class="linenos">661</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"from"</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">full_outer_join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">)</span>
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</span><span id="L-662"><a href="#L-662"><span class="linenos">662</span></a> <span class="n">join_conditions</span> <span class="o">=</span> <span class="n">full_outer_join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span>
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</span><span id="L-663"><a href="#L-663"><span class="linenos">663</span></a> <span class="o">*</span><span class="p">[</span>
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</span><span id="L-664"><a href="#L-664"><span class="linenos">664</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">col</span><span class="p">,</span> <span class="n">tables</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">col</span><span class="p">,</span> <span class="n">tables</span><span class="p">[</span><span class="mi">1</span><span class="p">]))</span>
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</span><span id="L-665"><a href="#L-665"><span class="linenos">665</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">full_outer_join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"using"</span><span class="p">)</span>
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</span><span id="L-666"><a href="#L-666"><span class="linenos">666</span></a> <span class="p">]</span>
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</span><span id="L-667"><a href="#L-667"><span class="linenos">667</span></a> <span class="p">)</span>
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</span><span id="L-668"><a href="#L-668"><span class="linenos">668</span></a>
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</span><span id="L-669"><a href="#L-669"><span class="linenos">669</span></a> <span class="n">full_outer_join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"side"</span><span class="p">,</span> <span class="s2">"left"</span><span class="p">)</span>
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</span><span id="L-670"><a href="#L-670"><span class="linenos">670</span></a> <span class="n">anti_join_clause</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">"1"</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"from"</span><span class="p">])</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">join_conditions</span><span class="p">)</span>
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</span><span id="L-671"><a href="#L-671"><span class="linenos">671</span></a> <span class="n">expression_copy</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"joins"</span><span class="p">][</span><span class="n">index</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"side"</span><span class="p">,</span> <span class="s2">"right"</span><span class="p">)</span>
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</span><span id="L-672"><a href="#L-672"><span class="linenos">672</span></a> <span class="n">expression_copy</span> <span class="o">=</span> <span class="n">expression_copy</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">anti_join_clause</span><span class="p">)</span><span class="o">.</span><span class="n">not_</span><span class="p">())</span>
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</span><span id="L-673"><a href="#L-673"><span class="linenos">673</span></a> <span class="n">expression_copy</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> <span class="c1"># remove CTEs from RIGHT side</span>
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</span><span id="L-674"><a href="#L-674"><span class="linenos">674</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> <span class="c1"># remove order by from LEFT side</span>
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|
</span><span id="L-675"><a href="#L-675"><span class="linenos">675</span></a>
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|
</span><span id="L-676"><a href="#L-676"><span class="linenos">676</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">union</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression_copy</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">distinct</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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|
</span><span id="L-677"><a href="#L-677"><span class="linenos">677</span></a>
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|
</span><span id="L-678"><a href="#L-678"><span class="linenos">678</span></a> <span class="k">return</span> <span class="n">expression</span>
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|
</span><span id="L-679"><a href="#L-679"><span class="linenos">679</span></a>
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|
</span><span id="L-680"><a href="#L-680"><span class="linenos">680</span></a>
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|
</span><span id="L-681"><a href="#L-681"><span class="linenos">681</span></a><span class="k">def</span><span class="w"> </span><span class="nf">move_ctes_to_top_level</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">E</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
|
|
</span><span id="L-682"><a href="#L-682"><span class="linenos">682</span></a><span class="w"> </span><span class="sd">"""</span>
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|
</span><span id="L-683"><a href="#L-683"><span class="linenos">683</span></a><span class="sd"> Some dialects (e.g. Hive, T-SQL, Spark prior to version 3) only allow CTEs to be</span>
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|
</span><span id="L-684"><a href="#L-684"><span class="linenos">684</span></a><span class="sd"> defined at the top-level, so for example queries like:</span>
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|
</span><span id="L-685"><a href="#L-685"><span class="linenos">685</span></a>
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|
</span><span id="L-686"><a href="#L-686"><span class="linenos">686</span></a><span class="sd"> SELECT * FROM (WITH t(c) AS (SELECT 1) SELECT * FROM t) AS subq</span>
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</span><span id="L-687"><a href="#L-687"><span class="linenos">687</span></a>
|
|
</span><span id="L-688"><a href="#L-688"><span class="linenos">688</span></a><span class="sd"> are invalid in those dialects. This transformation can be used to ensure all CTEs are</span>
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</span><span id="L-689"><a href="#L-689"><span class="linenos">689</span></a><span class="sd"> moved to the top level so that the final SQL code is valid from a syntax standpoint.</span>
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</span><span id="L-690"><a href="#L-690"><span class="linenos">690</span></a>
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</span><span id="L-691"><a href="#L-691"><span class="linenos">691</span></a><span class="sd"> TODO: handle name clashes whilst moving CTEs (it can get quite tricky & costly).</span>
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</span><span id="L-692"><a href="#L-692"><span class="linenos">692</span></a><span class="sd"> """</span>
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</span><span id="L-693"><a href="#L-693"><span class="linenos">693</span></a> <span class="n">top_level_with</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span>
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</span><span id="L-694"><a href="#L-694"><span class="linenos">694</span></a> <span class="k">for</span> <span class="n">inner_with</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">):</span>
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</span><span id="L-695"><a href="#L-695"><span class="linenos">695</span></a> <span class="k">if</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">parent</span> <span class="ow">is</span> <span class="n">expression</span><span class="p">:</span>
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</span><span id="L-696"><a href="#L-696"><span class="linenos">696</span></a> <span class="k">continue</span>
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</span><span id="L-697"><a href="#L-697"><span class="linenos">697</span></a>
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</span><span id="L-698"><a href="#L-698"><span class="linenos">698</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">top_level_with</span><span class="p">:</span>
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</span><span id="L-699"><a href="#L-699"><span class="linenos">699</span></a> <span class="n">top_level_with</span> <span class="o">=</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
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</span><span id="L-700"><a href="#L-700"><span class="linenos">700</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">top_level_with</span><span class="p">)</span>
|
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</span><span id="L-701"><a href="#L-701"><span class="linenos">701</span></a> <span class="k">else</span><span class="p">:</span>
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</span><span id="L-702"><a href="#L-702"><span class="linenos">702</span></a> <span class="k">if</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span>
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</span><span id="L-703"><a href="#L-703"><span class="linenos">703</span></a> <span class="n">top_level_with</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"recursive"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
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|
</span><span id="L-704"><a href="#L-704"><span class="linenos">704</span></a>
|
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</span><span id="L-705"><a href="#L-705"><span class="linenos">705</span></a> <span class="n">parent_cte</span> <span class="o">=</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">)</span>
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</span><span id="L-706"><a href="#L-706"><span class="linenos">706</span></a> <span class="n">inner_with</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
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|
</span><span id="L-707"><a href="#L-707"><span class="linenos">707</span></a>
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|
</span><span id="L-708"><a href="#L-708"><span class="linenos">708</span></a> <span class="k">if</span> <span class="n">parent_cte</span><span class="p">:</span>
|
|
</span><span id="L-709"><a href="#L-709"><span class="linenos">709</span></a> <span class="n">i</span> <span class="o">=</span> <span class="n">top_level_with</span><span class="o">.</span><span class="n">expressions</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">parent_cte</span><span class="p">)</span>
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|
</span><span id="L-710"><a href="#L-710"><span class="linenos">710</span></a> <span class="n">top_level_with</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="n">i</span><span class="p">:</span><span class="n">i</span><span class="p">]</span> <span class="o">=</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">expressions</span>
|
|
</span><span id="L-711"><a href="#L-711"><span class="linenos">711</span></a> <span class="n">top_level_with</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">top_level_with</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span>
|
|
</span><span id="L-712"><a href="#L-712"><span class="linenos">712</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-713"><a href="#L-713"><span class="linenos">713</span></a> <span class="n">top_level_with</span><span class="o">.</span><span class="n">set</span><span class="p">(</span>
|
|
</span><span id="L-714"><a href="#L-714"><span class="linenos">714</span></a> <span class="s2">"expressions"</span><span class="p">,</span> <span class="n">top_level_with</span><span class="o">.</span><span class="n">expressions</span> <span class="o">+</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">expressions</span>
|
|
</span><span id="L-715"><a href="#L-715"><span class="linenos">715</span></a> <span class="p">)</span>
|
|
</span><span id="L-716"><a href="#L-716"><span class="linenos">716</span></a>
|
|
</span><span id="L-717"><a href="#L-717"><span class="linenos">717</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-718"><a href="#L-718"><span class="linenos">718</span></a>
|
|
</span><span id="L-719"><a href="#L-719"><span class="linenos">719</span></a>
|
|
</span><span id="L-720"><a href="#L-720"><span class="linenos">720</span></a><span class="k">def</span><span class="w"> </span><span class="nf">ensure_bools</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-721"><a href="#L-721"><span class="linenos">721</span></a><span class="w"> </span><span class="sd">"""Converts numeric values used in conditions into explicit boolean expressions."""</span>
|
|
</span><span id="L-722"><a href="#L-722"><span class="linenos">722</span></a> <span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.optimizer.canonicalize</span><span class="w"> </span><span class="kn">import</span> <span class="n">ensure_bools</span>
|
|
</span><span id="L-723"><a href="#L-723"><span class="linenos">723</span></a>
|
|
</span><span id="L-724"><a href="#L-724"><span class="linenos">724</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_ensure_bool</span><span class="p">(</span><span class="n">node</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="L-725"><a href="#L-725"><span class="linenos">725</span></a> <span class="k">if</span> <span class="p">(</span>
|
|
</span><span id="L-726"><a href="#L-726"><span class="linenos">726</span></a> <span class="n">node</span><span class="o">.</span><span class="n">is_number</span>
|
|
</span><span id="L-727"><a href="#L-727"><span class="linenos">727</span></a> <span class="ow">or</span> <span class="p">(</span>
|
|
</span><span id="L-728"><a href="#L-728"><span class="linenos">728</span></a> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">SubqueryPredicate</span><span class="p">)</span>
|
|
</span><span id="L-729"><a href="#L-729"><span class="linenos">729</span></a> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">is_type</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">UNKNOWN</span><span class="p">,</span> <span class="o">*</span><span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">NUMERIC_TYPES</span><span class="p">)</span>
|
|
</span><span id="L-730"><a href="#L-730"><span class="linenos">730</span></a> <span class="p">)</span>
|
|
</span><span id="L-731"><a href="#L-731"><span class="linenos">731</span></a> <span class="ow">or</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">node</span><span class="o">.</span><span class="n">type</span><span class="p">)</span>
|
|
</span><span id="L-732"><a href="#L-732"><span class="linenos">732</span></a> <span class="p">):</span>
|
|
</span><span id="L-733"><a href="#L-733"><span class="linenos">733</span></a> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">neq</span><span class="p">(</span><span class="mi">0</span><span class="p">))</span>
|
|
</span><span id="L-734"><a href="#L-734"><span class="linenos">734</span></a>
|
|
</span><span id="L-735"><a href="#L-735"><span class="linenos">735</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">walk</span><span class="p">():</span>
|
|
</span><span id="L-736"><a href="#L-736"><span class="linenos">736</span></a> <span class="n">ensure_bools</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">_ensure_bool</span><span class="p">)</span>
|
|
</span><span id="L-737"><a href="#L-737"><span class="linenos">737</span></a>
|
|
</span><span id="L-738"><a href="#L-738"><span class="linenos">738</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-739"><a href="#L-739"><span class="linenos">739</span></a>
|
|
</span><span id="L-740"><a href="#L-740"><span class="linenos">740</span></a>
|
|
</span><span id="L-741"><a href="#L-741"><span class="linenos">741</span></a><span class="k">def</span><span class="w"> </span><span class="nf">unqualify_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-742"><a href="#L-742"><span class="linenos">742</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span>
|
|
</span><span id="L-743"><a href="#L-743"><span class="linenos">743</span></a> <span class="c1"># We only wanna pop off the table, db, catalog args</span>
|
|
</span><span id="L-744"><a href="#L-744"><span class="linenos">744</span></a> <span class="k">for</span> <span class="n">part</span> <span class="ow">in</span> <span class="n">column</span><span class="o">.</span><span class="n">parts</span><span class="p">[:</span><span class="o">-</span><span class="mi">1</span><span class="p">]:</span>
|
|
</span><span id="L-745"><a href="#L-745"><span class="linenos">745</span></a> <span class="n">part</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
|
|
</span><span id="L-746"><a href="#L-746"><span class="linenos">746</span></a>
|
|
</span><span id="L-747"><a href="#L-747"><span class="linenos">747</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-748"><a href="#L-748"><span class="linenos">748</span></a>
|
|
</span><span id="L-749"><a href="#L-749"><span class="linenos">749</span></a>
|
|
</span><span id="L-750"><a href="#L-750"><span class="linenos">750</span></a><span class="k">def</span><span class="w"> </span><span class="nf">remove_unique_constraints</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-751"><a href="#L-751"><span class="linenos">751</span></a> <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Create</span><span class="p">)</span>
|
|
</span><span id="L-752"><a href="#L-752"><span class="linenos">752</span></a> <span class="k">for</span> <span class="n">constraint</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">UniqueColumnConstraint</span><span class="p">):</span>
|
|
</span><span id="L-753"><a href="#L-753"><span class="linenos">753</span></a> <span class="k">if</span> <span class="n">constraint</span><span class="o">.</span><span class="n">parent</span><span class="p">:</span>
|
|
</span><span id="L-754"><a href="#L-754"><span class="linenos">754</span></a> <span class="n">constraint</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
|
|
</span><span id="L-755"><a href="#L-755"><span class="linenos">755</span></a>
|
|
</span><span id="L-756"><a href="#L-756"><span class="linenos">756</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-757"><a href="#L-757"><span class="linenos">757</span></a>
|
|
</span><span id="L-758"><a href="#L-758"><span class="linenos">758</span></a>
|
|
</span><span id="L-759"><a href="#L-759"><span class="linenos">759</span></a><span class="k">def</span><span class="w"> </span><span class="nf">ctas_with_tmp_tables_to_create_tmp_view</span><span class="p">(</span>
|
|
</span><span id="L-760"><a href="#L-760"><span class="linenos">760</span></a> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">,</span>
|
|
</span><span id="L-761"><a href="#L-761"><span class="linenos">761</span></a> <span class="n">tmp_storage_provider</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">e</span><span class="p">,</span>
|
|
</span><span id="L-762"><a href="#L-762"><span class="linenos">762</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-763"><a href="#L-763"><span class="linenos">763</span></a> <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Create</span><span class="p">)</span>
|
|
</span><span id="L-764"><a href="#L-764"><span class="linenos">764</span></a> <span class="n">properties</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"properties"</span><span class="p">)</span>
|
|
</span><span id="L-765"><a href="#L-765"><span class="linenos">765</span></a> <span class="n">temporary</span> <span class="o">=</span> <span class="nb">any</span><span class="p">(</span>
|
|
</span><span id="L-766"><a href="#L-766"><span class="linenos">766</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">prop</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TemporaryProperty</span><span class="p">)</span>
|
|
</span><span id="L-767"><a href="#L-767"><span class="linenos">767</span></a> <span class="k">for</span> <span class="n">prop</span> <span class="ow">in</span> <span class="p">(</span><span class="n">properties</span><span class="o">.</span><span class="n">expressions</span> <span class="k">if</span> <span class="n">properties</span> <span class="k">else</span> <span class="p">[])</span>
|
|
</span><span id="L-768"><a href="#L-768"><span class="linenos">768</span></a> <span class="p">)</span>
|
|
</span><span id="L-769"><a href="#L-769"><span class="linenos">769</span></a>
|
|
</span><span id="L-770"><a href="#L-770"><span class="linenos">770</span></a> <span class="c1"># CTAS with temp tables map to CREATE TEMPORARY VIEW</span>
|
|
</span><span id="L-771"><a href="#L-771"><span class="linenos">771</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">kind</span> <span class="o">==</span> <span class="s2">"TABLE"</span> <span class="ow">and</span> <span class="n">temporary</span><span class="p">:</span>
|
|
</span><span id="L-772"><a href="#L-772"><span class="linenos">772</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="p">:</span>
|
|
</span><span id="L-773"><a href="#L-773"><span class="linenos">773</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Create</span><span class="p">(</span>
|
|
</span><span id="L-774"><a href="#L-774"><span class="linenos">774</span></a> <span class="n">kind</span><span class="o">=</span><span class="s2">"TEMPORARY VIEW"</span><span class="p">,</span>
|
|
</span><span id="L-775"><a href="#L-775"><span class="linenos">775</span></a> <span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span>
|
|
</span><span id="L-776"><a href="#L-776"><span class="linenos">776</span></a> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span>
|
|
</span><span id="L-777"><a href="#L-777"><span class="linenos">777</span></a> <span class="p">)</span>
|
|
</span><span id="L-778"><a href="#L-778"><span class="linenos">778</span></a> <span class="k">return</span> <span class="n">tmp_storage_provider</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
|
</span><span id="L-779"><a href="#L-779"><span class="linenos">779</span></a>
|
|
</span><span id="L-780"><a href="#L-780"><span class="linenos">780</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-781"><a href="#L-781"><span class="linenos">781</span></a>
|
|
</span><span id="L-782"><a href="#L-782"><span class="linenos">782</span></a>
|
|
</span><span id="L-783"><a href="#L-783"><span class="linenos">783</span></a><span class="k">def</span><span class="w"> </span><span class="nf">move_schema_columns_to_partitioned_by</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-784"><a href="#L-784"><span class="linenos">784</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="L-785"><a href="#L-785"><span class="linenos">785</span></a><span class="sd"> In Hive, the PARTITIONED BY property acts as an extension of a table's schema. When the</span>
|
|
</span><span id="L-786"><a href="#L-786"><span class="linenos">786</span></a><span class="sd"> PARTITIONED BY value is an array of column names, they are transformed into a schema.</span>
|
|
</span><span id="L-787"><a href="#L-787"><span class="linenos">787</span></a><span class="sd"> The corresponding columns are removed from the create statement.</span>
|
|
</span><span id="L-788"><a href="#L-788"><span class="linenos">788</span></a><span class="sd"> """</span>
|
|
</span><span id="L-789"><a href="#L-789"><span class="linenos">789</span></a> <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Create</span><span class="p">)</span>
|
|
</span><span id="L-790"><a href="#L-790"><span class="linenos">790</span></a> <span class="n">has_schema</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Schema</span><span class="p">)</span>
|
|
</span><span id="L-791"><a href="#L-791"><span class="linenos">791</span></a> <span class="n">is_partitionable</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">kind</span> <span class="ow">in</span> <span class="p">{</span><span class="s2">"TABLE"</span><span class="p">,</span> <span class="s2">"VIEW"</span><span class="p">}</span>
|
|
</span><span id="L-792"><a href="#L-792"><span class="linenos">792</span></a>
|
|
</span><span id="L-793"><a href="#L-793"><span class="linenos">793</span></a> <span class="k">if</span> <span class="n">has_schema</span> <span class="ow">and</span> <span class="n">is_partitionable</span><span class="p">:</span>
|
|
</span><span id="L-794"><a href="#L-794"><span class="linenos">794</span></a> <span class="n">prop</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">PartitionedByProperty</span><span class="p">)</span>
|
|
</span><span id="L-795"><a href="#L-795"><span class="linenos">795</span></a> <span class="k">if</span> <span class="n">prop</span> <span class="ow">and</span> <span class="n">prop</span><span class="o">.</span><span class="n">this</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">prop</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Schema</span><span class="p">):</span>
|
|
</span><span id="L-796"><a href="#L-796"><span class="linenos">796</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="L-797"><a href="#L-797"><span class="linenos">797</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">v</span><span class="o">.</span><span class="n">name</span><span class="o">.</span><span class="n">upper</span><span class="p">()</span> <span class="k">for</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">prop</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">expressions</span><span class="p">}</span>
|
|
</span><span id="L-798"><a href="#L-798"><span class="linenos">798</span></a> <span class="n">partitions</span> <span class="o">=</span> <span class="p">[</span><span class="n">col</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">schema</span><span class="o">.</span><span class="n">expressions</span> <span class="k">if</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span><span class="o">.</span><span class="n">upper</span><span class="p">()</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">]</span>
|
|
</span><span id="L-799"><a href="#L-799"><span class="linenos">799</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="p">[</span><span class="n">e</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">schema</span><span class="o">.</span><span class="n">expressions</span> <span class="k">if</span> <span class="n">e</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">partitions</span><span class="p">])</span>
|
|
</span><span id="L-800"><a href="#L-800"><span class="linenos">800</span></a> <span class="n">prop</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">PartitionedByProperty</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">Schema</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="n">partitions</span><span class="p">)))</span>
|
|
</span><span id="L-801"><a href="#L-801"><span class="linenos">801</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span>
|
|
</span><span id="L-802"><a href="#L-802"><span class="linenos">802</span></a>
|
|
</span><span id="L-803"><a href="#L-803"><span class="linenos">803</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-804"><a href="#L-804"><span class="linenos">804</span></a>
|
|
</span><span id="L-805"><a href="#L-805"><span class="linenos">805</span></a>
|
|
</span><span id="L-806"><a href="#L-806"><span class="linenos">806</span></a><span class="k">def</span><span class="w"> </span><span class="nf">move_partitioned_by_to_schema_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-807"><a href="#L-807"><span class="linenos">807</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="L-808"><a href="#L-808"><span class="linenos">808</span></a><span class="sd"> Spark 3 supports both "HIVEFORMAT" and "DATASOURCE" formats for CREATE TABLE.</span>
|
|
</span><span id="L-809"><a href="#L-809"><span class="linenos">809</span></a>
|
|
</span><span id="L-810"><a href="#L-810"><span class="linenos">810</span></a><span class="sd"> Currently, SQLGlot uses the DATASOURCE format for Spark 3.</span>
|
|
</span><span id="L-811"><a href="#L-811"><span class="linenos">811</span></a><span class="sd"> """</span>
|
|
</span><span id="L-812"><a href="#L-812"><span class="linenos">812</span></a> <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Create</span><span class="p">)</span>
|
|
</span><span id="L-813"><a href="#L-813"><span class="linenos">813</span></a> <span class="n">prop</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">PartitionedByProperty</span><span class="p">)</span>
|
|
</span><span id="L-814"><a href="#L-814"><span class="linenos">814</span></a> <span class="k">if</span> <span class="p">(</span>
|
|
</span><span id="L-815"><a href="#L-815"><span class="linenos">815</span></a> <span class="n">prop</span>
|
|
</span><span id="L-816"><a href="#L-816"><span class="linenos">816</span></a> <span class="ow">and</span> <span class="n">prop</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="L-817"><a href="#L-817"><span class="linenos">817</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">prop</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Schema</span><span class="p">)</span>
|
|
</span><span id="L-818"><a href="#L-818"><span class="linenos">818</span></a> <span class="ow">and</span> <span class="nb">all</span><span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ColumnDef</span><span class="p">)</span> <span class="ow">and</span> <span class="n">e</span><span class="o">.</span><span class="n">kind</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">prop</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span>
|
|
</span><span id="L-819"><a href="#L-819"><span class="linenos">819</span></a> <span class="p">):</span>
|
|
</span><span id="L-820"><a href="#L-820"><span class="linenos">820</span></a> <span class="n">prop_this</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Tuple</span><span class="p">(</span>
|
|
</span><span id="L-821"><a href="#L-821"><span class="linenos">821</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">prop</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">expressions</span><span class="p">]</span>
|
|
</span><span id="L-822"><a href="#L-822"><span class="linenos">822</span></a> <span class="p">)</span>
|
|
</span><span id="L-823"><a href="#L-823"><span class="linenos">823</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="L-824"><a href="#L-824"><span class="linenos">824</span></a> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">prop</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span>
|
|
</span><span id="L-825"><a href="#L-825"><span class="linenos">825</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">e</span><span class="p">)</span>
|
|
</span><span id="L-826"><a href="#L-826"><span class="linenos">826</span></a> <span class="n">prop</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">prop_this</span><span class="p">)</span>
|
|
</span><span id="L-827"><a href="#L-827"><span class="linenos">827</span></a>
|
|
</span><span id="L-828"><a href="#L-828"><span class="linenos">828</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-829"><a href="#L-829"><span class="linenos">829</span></a>
|
|
</span><span id="L-830"><a href="#L-830"><span class="linenos">830</span></a>
|
|
</span><span id="L-831"><a href="#L-831"><span class="linenos">831</span></a><span class="k">def</span><span class="w"> </span><span class="nf">struct_kv_to_alias</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-832"><a href="#L-832"><span class="linenos">832</span></a><span class="w"> </span><span class="sd">"""Converts struct arguments to aliases, e.g. STRUCT(1 AS y)."""</span>
|
|
</span><span id="L-833"><a href="#L-833"><span class="linenos">833</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Struct</span><span class="p">):</span>
|
|
</span><span id="L-834"><a href="#L-834"><span class="linenos">834</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span>
|
|
</span><span id="L-835"><a href="#L-835"><span class="linenos">835</span></a> <span class="s2">"expressions"</span><span class="p">,</span>
|
|
</span><span id="L-836"><a href="#L-836"><span class="linenos">836</span></a> <span class="p">[</span>
|
|
</span><span id="L-837"><a href="#L-837"><span class="linenos">837</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">e</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">PropertyEQ</span><span class="p">)</span> <span class="k">else</span> <span class="n">e</span>
|
|
</span><span id="L-838"><a href="#L-838"><span class="linenos">838</span></a> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span>
|
|
</span><span id="L-839"><a href="#L-839"><span class="linenos">839</span></a> <span class="p">],</span>
|
|
</span><span id="L-840"><a href="#L-840"><span class="linenos">840</span></a> <span class="p">)</span>
|
|
</span><span id="L-841"><a href="#L-841"><span class="linenos">841</span></a>
|
|
</span><span id="L-842"><a href="#L-842"><span class="linenos">842</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-843"><a href="#L-843"><span class="linenos">843</span></a>
|
|
</span><span id="L-844"><a href="#L-844"><span class="linenos">844</span></a>
|
|
</span><span id="L-845"><a href="#L-845"><span class="linenos">845</span></a><span class="k">def</span><span class="w"> </span><span class="nf">eliminate_join_marks</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-846"><a href="#L-846"><span class="linenos">846</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="L-847"><a href="#L-847"><span class="linenos">847</span></a><span class="sd"> Remove join marks from an AST. This rule assumes that all marked columns are qualified.</span>
|
|
</span><span id="L-848"><a href="#L-848"><span class="linenos">848</span></a><span class="sd"> If this does not hold for a query, consider running `sqlglot.optimizer.qualify` first.</span>
|
|
</span><span id="L-849"><a href="#L-849"><span class="linenos">849</span></a>
|
|
</span><span id="L-850"><a href="#L-850"><span class="linenos">850</span></a><span class="sd"> For example,</span>
|
|
</span><span id="L-851"><a href="#L-851"><span class="linenos">851</span></a><span class="sd"> SELECT * FROM a, b WHERE a.id = b.id(+) -- ... is converted to</span>
|
|
</span><span id="L-852"><a href="#L-852"><span class="linenos">852</span></a><span class="sd"> SELECT * FROM a LEFT JOIN b ON a.id = b.id -- this</span>
|
|
</span><span id="L-853"><a href="#L-853"><span class="linenos">853</span></a>
|
|
</span><span id="L-854"><a href="#L-854"><span class="linenos">854</span></a><span class="sd"> Args:</span>
|
|
</span><span id="L-855"><a href="#L-855"><span class="linenos">855</span></a><span class="sd"> expression: The AST to remove join marks from.</span>
|
|
</span><span id="L-856"><a href="#L-856"><span class="linenos">856</span></a>
|
|
</span><span id="L-857"><a href="#L-857"><span class="linenos">857</span></a><span class="sd"> Returns:</span>
|
|
</span><span id="L-858"><a href="#L-858"><span class="linenos">858</span></a><span class="sd"> The AST with join marks removed.</span>
|
|
</span><span id="L-859"><a href="#L-859"><span class="linenos">859</span></a><span class="sd"> """</span>
|
|
</span><span id="L-860"><a href="#L-860"><span class="linenos">860</span></a> <span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.optimizer.scope</span><span class="w"> </span><span class="kn">import</span> <span class="n">traverse_scope</span>
|
|
</span><span id="L-861"><a href="#L-861"><span class="linenos">861</span></a>
|
|
</span><span id="L-862"><a href="#L-862"><span class="linenos">862</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span>
|
|
</span><span id="L-863"><a href="#L-863"><span class="linenos">863</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span>
|
|
</span><span id="L-864"><a href="#L-864"><span class="linenos">864</span></a>
|
|
</span><span id="L-865"><a href="#L-865"><span class="linenos">865</span></a> <span class="n">where</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span>
|
|
</span><span id="L-866"><a href="#L-866"><span class="linenos">866</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span>
|
|
</span><span id="L-867"><a href="#L-867"><span class="linenos">867</span></a>
|
|
</span><span id="L-868"><a href="#L-868"><span class="linenos">868</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">where</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">joins</span><span class="p">:</span>
|
|
</span><span id="L-869"><a href="#L-869"><span class="linenos">869</span></a> <span class="k">continue</span>
|
|
</span><span id="L-870"><a href="#L-870"><span class="linenos">870</span></a>
|
|
</span><span id="L-871"><a href="#L-871"><span class="linenos">871</span></a> <span class="n">query_from</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"from"</span><span class="p">]</span>
|
|
</span><span id="L-872"><a href="#L-872"><span class="linenos">872</span></a>
|
|
</span><span id="L-873"><a href="#L-873"><span class="linenos">873</span></a> <span class="c1"># These keep track of the joins to be replaced</span>
|
|
</span><span id="L-874"><a href="#L-874"><span class="linenos">874</span></a> <span class="n">new_joins</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span>
|
|
</span><span id="L-875"><a href="#L-875"><span class="linenos">875</span></a> <span class="n">old_joins</span> <span class="o">=</span> <span class="p">{</span><span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">join</span> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">}</span>
|
|
</span><span id="L-876"><a href="#L-876"><span class="linenos">876</span></a>
|
|
</span><span id="L-877"><a href="#L-877"><span class="linenos">877</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span>
|
|
</span><span id="L-878"><a href="#L-878"><span class="linenos">878</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"join_mark"</span><span class="p">):</span>
|
|
</span><span id="L-879"><a href="#L-879"><span class="linenos">879</span></a> <span class="k">continue</span>
|
|
</span><span id="L-880"><a href="#L-880"><span class="linenos">880</span></a>
|
|
</span><span id="L-881"><a href="#L-881"><span class="linenos">881</span></a> <span class="n">predicate</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span>
|
|
</span><span id="L-882"><a href="#L-882"><span class="linenos">882</span></a> <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span>
|
|
</span><span id="L-883"><a href="#L-883"><span class="linenos">883</span></a> <span class="n">predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span>
|
|
</span><span id="L-884"><a href="#L-884"><span class="linenos">884</span></a> <span class="p">),</span> <span class="s2">"Columns can only be marked with (+) when involved in a binary operation"</span>
|
|
</span><span id="L-885"><a href="#L-885"><span class="linenos">885</span></a>
|
|
</span><span id="L-886"><a href="#L-886"><span class="linenos">886</span></a> <span class="n">predicate_parent</span> <span class="o">=</span> <span class="n">predicate</span><span class="o">.</span><span class="n">parent</span>
|
|
</span><span id="L-887"><a href="#L-887"><span class="linenos">887</span></a> <span class="n">join_predicate</span> <span class="o">=</span> <span class="n">predicate</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
|
|
</span><span id="L-888"><a href="#L-888"><span class="linenos">888</span></a>
|
|
</span><span id="L-889"><a href="#L-889"><span class="linenos">889</span></a> <span class="n">left_columns</span> <span class="o">=</span> <span class="p">[</span>
|
|
</span><span id="L-890"><a href="#L-890"><span class="linenos">890</span></a> <span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">join_predicate</span><span class="o">.</span><span class="n">left</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">if</span> <span class="n">c</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"join_mark"</span><span class="p">)</span>
|
|
</span><span id="L-891"><a href="#L-891"><span class="linenos">891</span></a> <span class="p">]</span>
|
|
</span><span id="L-892"><a href="#L-892"><span class="linenos">892</span></a> <span class="n">right_columns</span> <span class="o">=</span> <span class="p">[</span>
|
|
</span><span id="L-893"><a href="#L-893"><span class="linenos">893</span></a> <span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">join_predicate</span><span class="o">.</span><span class="n">right</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">if</span> <span class="n">c</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"join_mark"</span><span class="p">)</span>
|
|
</span><span id="L-894"><a href="#L-894"><span class="linenos">894</span></a> <span class="p">]</span>
|
|
</span><span id="L-895"><a href="#L-895"><span class="linenos">895</span></a>
|
|
</span><span id="L-896"><a href="#L-896"><span class="linenos">896</span></a> <span class="k">assert</span> <span class="ow">not</span> <span class="p">(</span>
|
|
</span><span id="L-897"><a href="#L-897"><span class="linenos">897</span></a> <span class="n">left_columns</span> <span class="ow">and</span> <span class="n">right_columns</span>
|
|
</span><span id="L-898"><a href="#L-898"><span class="linenos">898</span></a> <span class="p">),</span> <span class="s2">"The (+) marker cannot appear in both sides of a binary predicate"</span>
|
|
</span><span id="L-899"><a href="#L-899"><span class="linenos">899</span></a>
|
|
</span><span id="L-900"><a href="#L-900"><span class="linenos">900</span></a> <span class="n">marked_column_tables</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
|
|
</span><span id="L-901"><a href="#L-901"><span class="linenos">901</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">left_columns</span> <span class="ow">or</span> <span class="n">right_columns</span><span class="p">:</span>
|
|
</span><span id="L-902"><a href="#L-902"><span class="linenos">902</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span>
|
|
</span><span id="L-903"><a href="#L-903"><span class="linenos">903</span></a> <span class="k">assert</span> <span class="n">table</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"Column </span><span class="si">{</span><span class="n">col</span><span class="si">}</span><span class="s2"> needs to be qualified with a table"</span>
|
|
</span><span id="L-904"><a href="#L-904"><span class="linenos">904</span></a>
|
|
</span><span id="L-905"><a href="#L-905"><span class="linenos">905</span></a> <span class="n">col</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"join_mark"</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span>
|
|
</span><span id="L-906"><a href="#L-906"><span class="linenos">906</span></a> <span class="n">marked_column_tables</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">table</span><span class="p">)</span>
|
|
</span><span id="L-907"><a href="#L-907"><span class="linenos">907</span></a>
|
|
</span><span id="L-908"><a href="#L-908"><span class="linenos">908</span></a> <span class="k">assert</span> <span class="p">(</span>
|
|
</span><span id="L-909"><a href="#L-909"><span class="linenos">909</span></a> <span class="nb">len</span><span class="p">(</span><span class="n">marked_column_tables</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span>
|
|
</span><span id="L-910"><a href="#L-910"><span class="linenos">910</span></a> <span class="p">),</span> <span class="s2">"Columns of only a single table can be marked with (+) in a given binary predicate"</span>
|
|
</span><span id="L-911"><a href="#L-911"><span class="linenos">911</span></a>
|
|
</span><span id="L-912"><a href="#L-912"><span class="linenos">912</span></a> <span class="c1"># Add predicate if join already copied, or add join if it is new</span>
|
|
</span><span id="L-913"><a href="#L-913"><span class="linenos">913</span></a> <span class="n">join_this</span> <span class="o">=</span> <span class="n">old_joins</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">col</span><span class="o">.</span><span class="n">table</span><span class="p">,</span> <span class="n">query_from</span><span class="p">)</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="L-914"><a href="#L-914"><span class="linenos">914</span></a> <span class="n">existing_join</span> <span class="o">=</span> <span class="n">new_joins</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">join_this</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">)</span>
|
|
</span><span id="L-915"><a href="#L-915"><span class="linenos">915</span></a> <span class="k">if</span> <span class="n">existing_join</span><span class="p">:</span>
|
|
</span><span id="L-916"><a href="#L-916"><span class="linenos">916</span></a> <span class="n">existing_join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="n">existing_join</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"on"</span><span class="p">],</span> <span class="n">join_predicate</span><span class="p">))</span>
|
|
</span><span id="L-917"><a href="#L-917"><span class="linenos">917</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-918"><a href="#L-918"><span class="linenos">918</span></a> <span class="n">new_joins</span><span class="p">[</span><span class="n">join_this</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">(</span>
|
|
</span><span id="L-919"><a href="#L-919"><span class="linenos">919</span></a> <span class="n">this</span><span class="o">=</span><span class="n">join_this</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">on</span><span class="o">=</span><span class="n">join_predicate</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">kind</span><span class="o">=</span><span class="s2">"LEFT"</span>
|
|
</span><span id="L-920"><a href="#L-920"><span class="linenos">920</span></a> <span class="p">)</span>
|
|
</span><span id="L-921"><a href="#L-921"><span class="linenos">921</span></a>
|
|
</span><span id="L-922"><a href="#L-922"><span class="linenos">922</span></a> <span class="c1"># If the parent of the target predicate is a binary node, then it now has only one child</span>
|
|
</span><span id="L-923"><a href="#L-923"><span class="linenos">923</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate_parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">):</span>
|
|
</span><span id="L-924"><a href="#L-924"><span class="linenos">924</span></a> <span class="k">if</span> <span class="n">predicate_parent</span><span class="o">.</span><span class="n">left</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="L-925"><a href="#L-925"><span class="linenos">925</span></a> <span class="n">predicate_parent</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">predicate_parent</span><span class="o">.</span><span class="n">right</span><span class="p">)</span>
|
|
</span><span id="L-926"><a href="#L-926"><span class="linenos">926</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-927"><a href="#L-927"><span class="linenos">927</span></a> <span class="n">predicate_parent</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">predicate_parent</span><span class="o">.</span><span class="n">left</span><span class="p">)</span>
|
|
</span><span id="L-928"><a href="#L-928"><span class="linenos">928</span></a>
|
|
</span><span id="L-929"><a href="#L-929"><span class="linenos">929</span></a> <span class="k">if</span> <span class="n">query_from</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">new_joins</span><span class="p">:</span>
|
|
</span><span id="L-930"><a href="#L-930"><span class="linenos">930</span></a> <span class="n">only_old_joins</span> <span class="o">=</span> <span class="n">old_joins</span><span class="o">.</span><span class="n">keys</span><span class="p">()</span> <span class="o">-</span> <span class="n">new_joins</span><span class="o">.</span><span class="n">keys</span><span class="p">()</span>
|
|
</span><span id="L-931"><a href="#L-931"><span class="linenos">931</span></a> <span class="k">assert</span> <span class="p">(</span>
|
|
</span><span id="L-932"><a href="#L-932"><span class="linenos">932</span></a> <span class="nb">len</span><span class="p">(</span><span class="n">only_old_joins</span><span class="p">)</span> <span class="o">>=</span> <span class="mi">1</span>
|
|
</span><span id="L-933"><a href="#L-933"><span class="linenos">933</span></a> <span class="p">),</span> <span class="s2">"Cannot determine which table to use in the new FROM clause"</span>
|
|
</span><span id="L-934"><a href="#L-934"><span class="linenos">934</span></a>
|
|
</span><span id="L-935"><a href="#L-935"><span class="linenos">935</span></a> <span class="n">new_from_name</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">only_old_joins</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
|
|
</span><span id="L-936"><a href="#L-936"><span class="linenos">936</span></a> <span class="n">query</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"from"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">old_joins</span><span class="p">[</span><span class="n">new_from_name</span><span class="p">]</span><span class="o">.</span><span class="n">this</span><span class="p">))</span>
|
|
</span><span id="L-937"><a href="#L-937"><span class="linenos">937</span></a>
|
|
</span><span id="L-938"><a href="#L-938"><span class="linenos">938</span></a> <span class="k">if</span> <span class="n">new_joins</span><span class="p">:</span>
|
|
</span><span id="L-939"><a href="#L-939"><span class="linenos">939</span></a> <span class="n">query</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="nb">list</span><span class="p">(</span><span class="n">new_joins</span><span class="o">.</span><span class="n">values</span><span class="p">()))</span>
|
|
</span><span id="L-940"><a href="#L-940"><span class="linenos">940</span></a>
|
|
</span><span id="L-941"><a href="#L-941"><span class="linenos">941</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">:</span>
|
|
</span><span id="L-942"><a href="#L-942"><span class="linenos">942</span></a> <span class="n">where</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
|
|
</span><span id="L-943"><a href="#L-943"><span class="linenos">943</span></a>
|
|
</span><span id="L-944"><a href="#L-944"><span class="linenos">944</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-945"><a href="#L-945"><span class="linenos">945</span></a>
|
|
</span><span id="L-946"><a href="#L-946"><span class="linenos">946</span></a>
|
|
</span><span id="L-947"><a href="#L-947"><span class="linenos">947</span></a><span class="k">def</span><span class="w"> </span><span class="nf">any_to_exists</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="L-948"><a href="#L-948"><span class="linenos">948</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="L-949"><a href="#L-949"><span class="linenos">949</span></a><span class="sd"> Transform ANY operator to Spark's EXISTS</span>
|
|
</span><span id="L-950"><a href="#L-950"><span class="linenos">950</span></a>
|
|
</span><span id="L-951"><a href="#L-951"><span class="linenos">951</span></a><span class="sd"> For example,</span>
|
|
</span><span id="L-952"><a href="#L-952"><span class="linenos">952</span></a><span class="sd"> - Postgres: SELECT * FROM tbl WHERE 5 > ANY(tbl.col)</span>
|
|
</span><span id="L-953"><a href="#L-953"><span class="linenos">953</span></a><span class="sd"> - Spark: SELECT * FROM tbl WHERE EXISTS(tbl.col, x -> x < 5)</span>
|
|
</span><span id="L-954"><a href="#L-954"><span class="linenos">954</span></a>
|
|
</span><span id="L-955"><a href="#L-955"><span class="linenos">955</span></a><span class="sd"> Both ANY and EXISTS accept queries but currently only array expressions are supported for this</span>
|
|
</span><span id="L-956"><a href="#L-956"><span class="linenos">956</span></a><span class="sd"> transformation</span>
|
|
</span><span id="L-957"><a href="#L-957"><span class="linenos">957</span></a><span class="sd"> """</span>
|
|
</span><span id="L-958"><a href="#L-958"><span class="linenos">958</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
|
|
</span><span id="L-959"><a href="#L-959"><span class="linenos">959</span></a> <span class="k">for</span> <span class="nb">any</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">):</span>
|
|
</span><span id="L-960"><a href="#L-960"><span class="linenos">960</span></a> <span class="n">this</span> <span class="o">=</span> <span class="nb">any</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="L-961"><a href="#L-961"><span class="linenos">961</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">):</span>
|
|
</span><span id="L-962"><a href="#L-962"><span class="linenos">962</span></a> <span class="k">continue</span>
|
|
</span><span id="L-963"><a href="#L-963"><span class="linenos">963</span></a>
|
|
</span><span id="L-964"><a href="#L-964"><span class="linenos">964</span></a> <span class="n">binop</span> <span class="o">=</span> <span class="nb">any</span><span class="o">.</span><span class="n">parent</span>
|
|
</span><span id="L-965"><a href="#L-965"><span class="linenos">965</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">binop</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">):</span>
|
|
</span><span id="L-966"><a href="#L-966"><span class="linenos">966</span></a> <span class="n">lambda_arg</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="s2">"x"</span><span class="p">)</span>
|
|
</span><span id="L-967"><a href="#L-967"><span class="linenos">967</span></a> <span class="nb">any</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">lambda_arg</span><span class="p">)</span>
|
|
</span><span id="L-968"><a href="#L-968"><span class="linenos">968</span></a> <span class="n">lambda_expr</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Lambda</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">binop</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">lambda_arg</span><span class="p">])</span>
|
|
</span><span id="L-969"><a href="#L-969"><span class="linenos">969</span></a> <span class="n">binop</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">this</span><span class="o">.</span><span class="n">unnest</span><span class="p">(),</span> <span class="n">expression</span><span class="o">=</span><span class="n">lambda_expr</span><span class="p">))</span>
|
|
</span><span id="L-970"><a href="#L-970"><span class="linenos">970</span></a>
|
|
</span><span id="L-971"><a href="#L-971"><span class="linenos">971</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
</section>
|
|
<section id="preprocess">
|
|
<input id="preprocess-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
|
<div class="attr function">
|
|
|
|
<span class="def">def</span>
|
|
<span class="name">preprocess</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">transforms</span><span class="p">:</span> <span class="n">List</span><span class="p">[</span><span class="n">Callable</span><span class="p">[[</span><span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span><span class="p">],</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span><span class="p">]]</span></span><span class="return-annotation">) -> <span class="n">Callable</span><span class="p">[[</span><span class="n"><a href="generator.html#Generator">sqlglot.generator.Generator</a></span><span class="p">,</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span><span class="p">],</span> <span class="nb">str</span><span class="p">]</span>:</span></span>
|
|
|
|
<label class="view-source-button" for="preprocess-view-source"><span>View Source</span></label>
|
|
|
|
</div>
|
|
<a class="headerlink" href="#preprocess"></a>
|
|
<div class="pdoc-code codehilite"><pre><span></span><span id="preprocess-16"><a href="#preprocess-16"><span class="linenos">16</span></a><span class="k">def</span><span class="w"> </span><span class="nf">preprocess</span><span class="p">(</span>
|
|
</span><span id="preprocess-17"><a href="#preprocess-17"><span class="linenos">17</span></a> <span class="n">transforms</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]],</span>
|
|
</span><span id="preprocess-18"><a href="#preprocess-18"><span class="linenos">18</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">Generator</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="nb">str</span><span class="p">]:</span>
|
|
</span><span id="preprocess-19"><a href="#preprocess-19"><span class="linenos">19</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="preprocess-20"><a href="#preprocess-20"><span class="linenos">20</span></a><span class="sd"> Creates a new transform by chaining a sequence of transformations and converts the resulting</span>
|
|
</span><span id="preprocess-21"><a href="#preprocess-21"><span class="linenos">21</span></a><span class="sd"> expression to SQL, using either the "_sql" method corresponding to the resulting expression,</span>
|
|
</span><span id="preprocess-22"><a href="#preprocess-22"><span class="linenos">22</span></a><span class="sd"> or the appropriate `Generator.TRANSFORMS` function (when applicable -- see below).</span>
|
|
</span><span id="preprocess-23"><a href="#preprocess-23"><span class="linenos">23</span></a>
|
|
</span><span id="preprocess-24"><a href="#preprocess-24"><span class="linenos">24</span></a><span class="sd"> Args:</span>
|
|
</span><span id="preprocess-25"><a href="#preprocess-25"><span class="linenos">25</span></a><span class="sd"> transforms: sequence of transform functions. These will be called in order.</span>
|
|
</span><span id="preprocess-26"><a href="#preprocess-26"><span class="linenos">26</span></a>
|
|
</span><span id="preprocess-27"><a href="#preprocess-27"><span class="linenos">27</span></a><span class="sd"> Returns:</span>
|
|
</span><span id="preprocess-28"><a href="#preprocess-28"><span class="linenos">28</span></a><span class="sd"> Function that can be used as a generator transform.</span>
|
|
</span><span id="preprocess-29"><a href="#preprocess-29"><span class="linenos">29</span></a><span class="sd"> """</span>
|
|
</span><span id="preprocess-30"><a href="#preprocess-30"><span class="linenos">30</span></a>
|
|
</span><span id="preprocess-31"><a href="#preprocess-31"><span class="linenos">31</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_to_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span>
|
|
</span><span id="preprocess-32"><a href="#preprocess-32"><span class="linenos">32</span></a> <span class="n">expression_type</span> <span class="o">=</span> <span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
|
</span><span id="preprocess-33"><a href="#preprocess-33"><span class="linenos">33</span></a>
|
|
</span><span id="preprocess-34"><a href="#preprocess-34"><span class="linenos">34</span></a> <span class="k">try</span><span class="p">:</span>
|
|
</span><span id="preprocess-35"><a href="#preprocess-35"><span class="linenos">35</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">transforms</span><span class="p">[</span><span class="mi">0</span><span class="p">](</span><span class="n">expression</span><span class="p">)</span>
|
|
</span><span id="preprocess-36"><a href="#preprocess-36"><span class="linenos">36</span></a> <span class="k">for</span> <span class="n">transform</span> <span class="ow">in</span> <span class="n">transforms</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span>
|
|
</span><span id="preprocess-37"><a href="#preprocess-37"><span class="linenos">37</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">transform</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
|
</span><span id="preprocess-38"><a href="#preprocess-38"><span class="linenos">38</span></a> <span class="k">except</span> <span class="n">UnsupportedError</span> <span class="k">as</span> <span class="n">unsupported_error</span><span class="p">:</span>
|
|
</span><span id="preprocess-39"><a href="#preprocess-39"><span class="linenos">39</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">unsupported</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">unsupported_error</span><span class="p">))</span>
|
|
</span><span id="preprocess-40"><a href="#preprocess-40"><span class="linenos">40</span></a>
|
|
</span><span id="preprocess-41"><a href="#preprocess-41"><span class="linenos">41</span></a> <span class="n">_sql_handler</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">key</span> <span class="o">+</span> <span class="s2">"_sql"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
|
|
</span><span id="preprocess-42"><a href="#preprocess-42"><span class="linenos">42</span></a> <span class="k">if</span> <span class="n">_sql_handler</span><span class="p">:</span>
|
|
</span><span id="preprocess-43"><a href="#preprocess-43"><span class="linenos">43</span></a> <span class="k">return</span> <span class="n">_sql_handler</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
|
</span><span id="preprocess-44"><a href="#preprocess-44"><span class="linenos">44</span></a>
|
|
</span><span id="preprocess-45"><a href="#preprocess-45"><span class="linenos">45</span></a> <span class="n">transforms_handler</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORMS</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">))</span>
|
|
</span><span id="preprocess-46"><a href="#preprocess-46"><span class="linenos">46</span></a> <span class="k">if</span> <span class="n">transforms_handler</span><span class="p">:</span>
|
|
</span><span id="preprocess-47"><a href="#preprocess-47"><span class="linenos">47</span></a> <span class="k">if</span> <span class="n">expression_type</span> <span class="ow">is</span> <span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span>
|
|
</span><span id="preprocess-48"><a href="#preprocess-48"><span class="linenos">48</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Func</span><span class="p">):</span>
|
|
</span><span id="preprocess-49"><a href="#preprocess-49"><span class="linenos">49</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">function_fallback_sql</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
|
</span><span id="preprocess-50"><a href="#preprocess-50"><span class="linenos">50</span></a>
|
|
</span><span id="preprocess-51"><a href="#preprocess-51"><span class="linenos">51</span></a> <span class="c1"># Ensures we don't enter an infinite loop. This can happen when the original expression</span>
|
|
</span><span id="preprocess-52"><a href="#preprocess-52"><span class="linenos">52</span></a> <span class="c1"># has the same type as the final expression and there's no _sql method available for it,</span>
|
|
</span><span id="preprocess-53"><a href="#preprocess-53"><span class="linenos">53</span></a> <span class="c1"># because then it'd re-enter _to_sql.</span>
|
|
</span><span id="preprocess-54"><a href="#preprocess-54"><span class="linenos">54</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span>
|
|
</span><span id="preprocess-55"><a href="#preprocess-55"><span class="linenos">55</span></a> <span class="sa">f</span><span class="s2">"Expression type </span><span class="si">{</span><span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2"> requires a _sql method in order to be transformed."</span>
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</span><span id="preprocess-56"><a href="#preprocess-56"><span class="linenos">56</span></a> <span class="p">)</span>
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</span><span id="preprocess-57"><a href="#preprocess-57"><span class="linenos">57</span></a>
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</span><span id="preprocess-58"><a href="#preprocess-58"><span class="linenos">58</span></a> <span class="k">return</span> <span class="n">transforms_handler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">)</span>
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</span><span id="preprocess-59"><a href="#preprocess-59"><span class="linenos">59</span></a>
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</span><span id="preprocess-60"><a href="#preprocess-60"><span class="linenos">60</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unsupported expression type </span><span class="si">{</span><span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2">."</span><span class="p">)</span>
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</span><span id="preprocess-61"><a href="#preprocess-61"><span class="linenos">61</span></a>
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</span><span id="preprocess-62"><a href="#preprocess-62"><span class="linenos">62</span></a> <span class="k">return</span> <span class="n">_to_sql</span>
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</span></pre></div>
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<div class="docstring"><p>Creates a new transform by chaining a sequence of transformations and converts the resulting
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expression to SQL, using either the "_sql" method corresponding to the resulting expression,
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or the appropriate <code>Generator.TRANSFORMS</code> function (when applicable -- see below).</p>
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<h6 id="arguments">Arguments:</h6>
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<ul>
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<li><strong>transforms:</strong> sequence of transform functions. These will be called in order.</li>
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</ul>
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<h6 id="returns">Returns:</h6>
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<blockquote>
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<p>Function that can be used as a generator transform.</p>
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</blockquote>
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</div>
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</section>
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<section id="unnest_generate_date_array_using_recursive_cte">
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<input id="unnest_generate_date_array_using_recursive_cte-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">unnest_generate_date_array_using_recursive_cte</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="unnest_generate_date_array_using_recursive_cte-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#unnest_generate_date_array_using_recursive_cte"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="unnest_generate_date_array_using_recursive_cte-65"><a href="#unnest_generate_date_array_using_recursive_cte-65"><span class="linenos"> 65</span></a><span class="k">def</span><span class="w"> </span><span class="nf">unnest_generate_date_array_using_recursive_cte</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-66"><a href="#unnest_generate_date_array_using_recursive_cte-66"><span class="linenos"> 66</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-67"><a href="#unnest_generate_date_array_using_recursive_cte-67"><span class="linenos"> 67</span></a> <span class="n">count</span> <span class="o">=</span> <span class="mi">0</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-68"><a href="#unnest_generate_date_array_using_recursive_cte-68"><span class="linenos"> 68</span></a> <span class="n">recursive_ctes</span> <span class="o">=</span> <span class="p">[]</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-69"><a href="#unnest_generate_date_array_using_recursive_cte-69"><span class="linenos"> 69</span></a>
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</span><span id="unnest_generate_date_array_using_recursive_cte-70"><a href="#unnest_generate_date_array_using_recursive_cte-70"><span class="linenos"> 70</span></a> <span class="k">for</span> <span class="n">unnest</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">):</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-71"><a href="#unnest_generate_date_array_using_recursive_cte-71"><span class="linenos"> 71</span></a> <span class="k">if</span> <span class="p">(</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-72"><a href="#unnest_generate_date_array_using_recursive_cte-72"><span class="linenos"> 72</span></a> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnest</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">))</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-73"><a href="#unnest_generate_date_array_using_recursive_cte-73"><span class="linenos"> 73</span></a> <span class="ow">or</span> <span class="nb">len</span><span class="p">(</span><span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">1</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-74"><a href="#unnest_generate_date_array_using_recursive_cte-74"><span class="linenos"> 74</span></a> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">GenerateDateArray</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-75"><a href="#unnest_generate_date_array_using_recursive_cte-75"><span class="linenos"> 75</span></a> <span class="p">):</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-76"><a href="#unnest_generate_date_array_using_recursive_cte-76"><span class="linenos"> 76</span></a> <span class="k">continue</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-77"><a href="#unnest_generate_date_array_using_recursive_cte-77"><span class="linenos"> 77</span></a>
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</span><span id="unnest_generate_date_array_using_recursive_cte-78"><a href="#unnest_generate_date_array_using_recursive_cte-78"><span class="linenos"> 78</span></a> <span class="n">generate_date_array</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-79"><a href="#unnest_generate_date_array_using_recursive_cte-79"><span class="linenos"> 79</span></a> <span class="n">start</span> <span class="o">=</span> <span class="n">generate_date_array</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"start"</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-80"><a href="#unnest_generate_date_array_using_recursive_cte-80"><span class="linenos"> 80</span></a> <span class="n">end</span> <span class="o">=</span> <span class="n">generate_date_array</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"end"</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-81"><a href="#unnest_generate_date_array_using_recursive_cte-81"><span class="linenos"> 81</span></a> <span class="n">step</span> <span class="o">=</span> <span class="n">generate_date_array</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"step"</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-82"><a href="#unnest_generate_date_array_using_recursive_cte-82"><span class="linenos"> 82</span></a>
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</span><span id="unnest_generate_date_array_using_recursive_cte-83"><a href="#unnest_generate_date_array_using_recursive_cte-83"><span class="linenos"> 83</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">start</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">end</span> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">step</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Interval</span><span class="p">):</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-84"><a href="#unnest_generate_date_array_using_recursive_cte-84"><span class="linenos"> 84</span></a> <span class="k">continue</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-85"><a href="#unnest_generate_date_array_using_recursive_cte-85"><span class="linenos"> 85</span></a>
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</span><span id="unnest_generate_date_array_using_recursive_cte-86"><a href="#unnest_generate_date_array_using_recursive_cte-86"><span class="linenos"> 86</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-87"><a href="#unnest_generate_date_array_using_recursive_cte-87"><span class="linenos"> 87</span></a> <span class="n">column_name</span> <span class="o">=</span> <span class="n">alias</span><span class="o">.</span><span class="n">columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">alias</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">)</span> <span class="k">else</span> <span class="s2">"date_value"</span>
|
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</span><span id="unnest_generate_date_array_using_recursive_cte-88"><a href="#unnest_generate_date_array_using_recursive_cte-88"><span class="linenos"> 88</span></a>
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</span><span id="unnest_generate_date_array_using_recursive_cte-89"><a href="#unnest_generate_date_array_using_recursive_cte-89"><span class="linenos"> 89</span></a> <span class="n">start</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">start</span><span class="p">,</span> <span class="s2">"date"</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-90"><a href="#unnest_generate_date_array_using_recursive_cte-90"><span class="linenos"> 90</span></a> <span class="n">date_add</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">func</span><span class="p">(</span>
|
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</span><span id="unnest_generate_date_array_using_recursive_cte-91"><a href="#unnest_generate_date_array_using_recursive_cte-91"><span class="linenos"> 91</span></a> <span class="s2">"date_add"</span><span class="p">,</span> <span class="n">column_name</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">step</span><span class="o">.</span><span class="n">name</span><span class="p">),</span> <span class="n">step</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"unit"</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-92"><a href="#unnest_generate_date_array_using_recursive_cte-92"><span class="linenos"> 92</span></a> <span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-93"><a href="#unnest_generate_date_array_using_recursive_cte-93"><span class="linenos"> 93</span></a> <span class="n">cast_date_add</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">date_add</span><span class="p">,</span> <span class="s2">"date"</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-94"><a href="#unnest_generate_date_array_using_recursive_cte-94"><span class="linenos"> 94</span></a>
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</span><span id="unnest_generate_date_array_using_recursive_cte-95"><a href="#unnest_generate_date_array_using_recursive_cte-95"><span class="linenos"> 95</span></a> <span class="n">cte_name</span> <span class="o">=</span> <span class="s2">"_generated_dates"</span> <span class="o">+</span> <span class="p">(</span><span class="sa">f</span><span class="s2">"_</span><span class="si">{</span><span class="n">count</span><span class="si">}</span><span class="s2">"</span> <span class="k">if</span> <span class="n">count</span> <span class="k">else</span> <span class="s2">""</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-96"><a href="#unnest_generate_date_array_using_recursive_cte-96"><span class="linenos"> 96</span></a>
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</span><span id="unnest_generate_date_array_using_recursive_cte-97"><a href="#unnest_generate_date_array_using_recursive_cte-97"><span class="linenos"> 97</span></a> <span class="n">base_query</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">start</span><span class="o">.</span><span class="n">as_</span><span class="p">(</span><span class="n">column_name</span><span class="p">))</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-98"><a href="#unnest_generate_date_array_using_recursive_cte-98"><span class="linenos"> 98</span></a> <span class="n">recursive_query</span> <span class="o">=</span> <span class="p">(</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-99"><a href="#unnest_generate_date_array_using_recursive_cte-99"><span class="linenos"> 99</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">cast_date_add</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-100"><a href="#unnest_generate_date_array_using_recursive_cte-100"><span class="linenos">100</span></a> <span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">cte_name</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-101"><a href="#unnest_generate_date_array_using_recursive_cte-101"><span class="linenos">101</span></a> <span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">cast_date_add</span> <span class="o"><=</span> <span class="n">exp</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">end</span><span class="p">,</span> <span class="s2">"date"</span><span class="p">))</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-102"><a href="#unnest_generate_date_array_using_recursive_cte-102"><span class="linenos">102</span></a> <span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-103"><a href="#unnest_generate_date_array_using_recursive_cte-103"><span class="linenos">103</span></a> <span class="n">cte_query</span> <span class="o">=</span> <span class="n">base_query</span><span class="o">.</span><span class="n">union</span><span class="p">(</span><span class="n">recursive_query</span><span class="p">,</span> <span class="n">distinct</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-104"><a href="#unnest_generate_date_array_using_recursive_cte-104"><span class="linenos">104</span></a>
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</span><span id="unnest_generate_date_array_using_recursive_cte-105"><a href="#unnest_generate_date_array_using_recursive_cte-105"><span class="linenos">105</span></a> <span class="n">generate_dates_query</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">cte_name</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-106"><a href="#unnest_generate_date_array_using_recursive_cte-106"><span class="linenos">106</span></a> <span class="n">unnest</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">generate_dates_query</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="n">cte_name</span><span class="p">))</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-107"><a href="#unnest_generate_date_array_using_recursive_cte-107"><span class="linenos">107</span></a>
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</span><span id="unnest_generate_date_array_using_recursive_cte-108"><a href="#unnest_generate_date_array_using_recursive_cte-108"><span class="linenos">108</span></a> <span class="n">recursive_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-109"><a href="#unnest_generate_date_array_using_recursive_cte-109"><span class="linenos">109</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">cte_query</span><span class="p">),</span> <span class="n">cte_name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">column_name</span><span class="p">])</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-110"><a href="#unnest_generate_date_array_using_recursive_cte-110"><span class="linenos">110</span></a> <span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-111"><a href="#unnest_generate_date_array_using_recursive_cte-111"><span class="linenos">111</span></a> <span class="n">count</span> <span class="o">+=</span> <span class="mi">1</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-112"><a href="#unnest_generate_date_array_using_recursive_cte-112"><span class="linenos">112</span></a>
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</span><span id="unnest_generate_date_array_using_recursive_cte-113"><a href="#unnest_generate_date_array_using_recursive_cte-113"><span class="linenos">113</span></a> <span class="k">if</span> <span class="n">recursive_ctes</span><span class="p">:</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-114"><a href="#unnest_generate_date_array_using_recursive_cte-114"><span class="linenos">114</span></a> <span class="n">with_expression</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">()</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-115"><a href="#unnest_generate_date_array_using_recursive_cte-115"><span class="linenos">115</span></a> <span class="n">with_expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"recursive"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-116"><a href="#unnest_generate_date_array_using_recursive_cte-116"><span class="linenos">116</span></a> <span class="n">with_expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="p">[</span><span class="o">*</span><span class="n">recursive_ctes</span><span class="p">,</span> <span class="o">*</span><span class="n">with_expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">])</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-117"><a href="#unnest_generate_date_array_using_recursive_cte-117"><span class="linenos">117</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">with_expression</span><span class="p">)</span>
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</span><span id="unnest_generate_date_array_using_recursive_cte-118"><a href="#unnest_generate_date_array_using_recursive_cte-118"><span class="linenos">118</span></a>
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</span><span id="unnest_generate_date_array_using_recursive_cte-119"><a href="#unnest_generate_date_array_using_recursive_cte-119"><span class="linenos">119</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span></pre></div>
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</section>
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<section id="unnest_generate_series">
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<input id="unnest_generate_series-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">unnest_generate_series</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="unnest_generate_series-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#unnest_generate_series"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="unnest_generate_series-122"><a href="#unnest_generate_series-122"><span class="linenos">122</span></a><span class="k">def</span><span class="w"> </span><span class="nf">unnest_generate_series</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="unnest_generate_series-123"><a href="#unnest_generate_series-123"><span class="linenos">123</span></a><span class="w"> </span><span class="sd">"""Unnests GENERATE_SERIES or SEQUENCE table references."""</span>
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</span><span id="unnest_generate_series-124"><a href="#unnest_generate_series-124"><span class="linenos">124</span></a> <span class="n">this</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span>
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</span><span id="unnest_generate_series-125"><a href="#unnest_generate_series-125"><span class="linenos">125</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GenerateSeries</span><span class="p">):</span>
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</span><span id="unnest_generate_series-126"><a href="#unnest_generate_series-126"><span class="linenos">126</span></a> <span class="n">unnest</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">this</span><span class="p">])</span>
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</span><span id="unnest_generate_series-127"><a href="#unnest_generate_series-127"><span class="linenos">127</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span>
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</span><span id="unnest_generate_series-128"><a href="#unnest_generate_series-128"><span class="linenos">128</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">alias</span><span class="o">=</span><span class="s2">"_u"</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">expression</span><span class="o">.</span><span class="n">alias</span><span class="p">],</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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</span><span id="unnest_generate_series-129"><a href="#unnest_generate_series-129"><span class="linenos">129</span></a>
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</span><span id="unnest_generate_series-130"><a href="#unnest_generate_series-130"><span class="linenos">130</span></a> <span class="k">return</span> <span class="n">unnest</span>
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</span><span id="unnest_generate_series-131"><a href="#unnest_generate_series-131"><span class="linenos">131</span></a>
|
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</span><span id="unnest_generate_series-132"><a href="#unnest_generate_series-132"><span class="linenos">132</span></a> <span class="k">return</span> <span class="n">expression</span>
|
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</span></pre></div>
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<div class="docstring"><p>Unnests GENERATE_SERIES or SEQUENCE table references.</p>
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</div>
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</section>
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<section id="unalias_group">
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<input id="unalias_group-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">unalias_group</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="unalias_group-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#unalias_group"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="unalias_group-135"><a href="#unalias_group-135"><span class="linenos">135</span></a><span class="k">def</span><span class="w"> </span><span class="nf">unalias_group</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="unalias_group-136"><a href="#unalias_group-136"><span class="linenos">136</span></a><span class="w"> </span><span class="sd">"""</span>
|
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</span><span id="unalias_group-137"><a href="#unalias_group-137"><span class="linenos">137</span></a><span class="sd"> Replace references to select aliases in GROUP BY clauses.</span>
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</span><span id="unalias_group-138"><a href="#unalias_group-138"><span class="linenos">138</span></a>
|
|
</span><span id="unalias_group-139"><a href="#unalias_group-139"><span class="linenos">139</span></a><span class="sd"> Example:</span>
|
|
</span><span id="unalias_group-140"><a href="#unalias_group-140"><span class="linenos">140</span></a><span class="sd"> >>> import sqlglot</span>
|
|
</span><span id="unalias_group-141"><a href="#unalias_group-141"><span class="linenos">141</span></a><span class="sd"> >>> sqlglot.parse_one("SELECT a AS b FROM x GROUP BY b").transform(unalias_group).sql()</span>
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</span><span id="unalias_group-142"><a href="#unalias_group-142"><span class="linenos">142</span></a><span class="sd"> 'SELECT a AS b FROM x GROUP BY 1'</span>
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</span><span id="unalias_group-143"><a href="#unalias_group-143"><span class="linenos">143</span></a>
|
|
</span><span id="unalias_group-144"><a href="#unalias_group-144"><span class="linenos">144</span></a><span class="sd"> Args:</span>
|
|
</span><span id="unalias_group-145"><a href="#unalias_group-145"><span class="linenos">145</span></a><span class="sd"> expression: the expression that will be transformed.</span>
|
|
</span><span id="unalias_group-146"><a href="#unalias_group-146"><span class="linenos">146</span></a>
|
|
</span><span id="unalias_group-147"><a href="#unalias_group-147"><span class="linenos">147</span></a><span class="sd"> Returns:</span>
|
|
</span><span id="unalias_group-148"><a href="#unalias_group-148"><span class="linenos">148</span></a><span class="sd"> The transformed expression.</span>
|
|
</span><span id="unalias_group-149"><a href="#unalias_group-149"><span class="linenos">149</span></a><span class="sd"> """</span>
|
|
</span><span id="unalias_group-150"><a href="#unalias_group-150"><span class="linenos">150</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Group</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
|
|
</span><span id="unalias_group-151"><a href="#unalias_group-151"><span class="linenos">151</span></a> <span class="n">aliased_selects</span> <span class="o">=</span> <span class="p">{</span>
|
|
</span><span id="unalias_group-152"><a href="#unalias_group-152"><span class="linenos">152</span></a> <span class="n">e</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> <span class="n">i</span>
|
|
</span><span id="unalias_group-153"><a href="#unalias_group-153"><span class="linenos">153</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">e</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">expressions</span><span class="p">,</span> <span class="n">start</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
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|
</span><span id="unalias_group-154"><a href="#unalias_group-154"><span class="linenos">154</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span>
|
|
</span><span id="unalias_group-155"><a href="#unalias_group-155"><span class="linenos">155</span></a> <span class="p">}</span>
|
|
</span><span id="unalias_group-156"><a href="#unalias_group-156"><span class="linenos">156</span></a>
|
|
</span><span id="unalias_group-157"><a href="#unalias_group-157"><span class="linenos">157</span></a> <span class="k">for</span> <span class="n">group_by</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span>
|
|
</span><span id="unalias_group-158"><a href="#unalias_group-158"><span class="linenos">158</span></a> <span class="k">if</span> <span class="p">(</span>
|
|
</span><span id="unalias_group-159"><a href="#unalias_group-159"><span class="linenos">159</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">group_by</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span>
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|
</span><span id="unalias_group-160"><a href="#unalias_group-160"><span class="linenos">160</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">group_by</span><span class="o">.</span><span class="n">table</span>
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</span><span id="unalias_group-161"><a href="#unalias_group-161"><span class="linenos">161</span></a> <span class="ow">and</span> <span class="n">group_by</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">aliased_selects</span>
|
|
</span><span id="unalias_group-162"><a href="#unalias_group-162"><span class="linenos">162</span></a> <span class="p">):</span>
|
|
</span><span id="unalias_group-163"><a href="#unalias_group-163"><span class="linenos">163</span></a> <span class="n">group_by</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">aliased_selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">group_by</span><span class="o">.</span><span class="n">name</span><span class="p">)))</span>
|
|
</span><span id="unalias_group-164"><a href="#unalias_group-164"><span class="linenos">164</span></a>
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|
</span><span id="unalias_group-165"><a href="#unalias_group-165"><span class="linenos">165</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
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|
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|
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<div class="docstring"><p>Replace references to select aliases in GROUP BY clauses.</p>
|
|
|
|
<h6 id="example">Example:</h6>
|
|
|
|
<blockquote>
|
|
<div class="pdoc-code codehilite">
|
|
<pre><span></span><code><span class="gp">>>> </span><span class="kn">import</span><span class="w"> </span><span class="nn">sqlglot</span>
|
|
<span class="gp">>>> </span><span class="n"><a href="../sqlglot.html#parse_one">sqlglot.parse_one</a></span><span class="p">(</span><span class="s2">"SELECT a AS b FROM x GROUP BY b"</span><span class="p">)</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">unalias_group</span><span class="p">)</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span>
|
|
<span class="go">'SELECT a AS b FROM x GROUP BY 1'</span>
|
|
</code></pre>
|
|
</div>
|
|
</blockquote>
|
|
|
|
<h6 id="arguments">Arguments:</h6>
|
|
|
|
<ul>
|
|
<li><strong>expression:</strong> the expression that will be transformed.</li>
|
|
</ul>
|
|
|
|
<h6 id="returns">Returns:</h6>
|
|
|
|
<blockquote>
|
|
<p>The transformed expression.</p>
|
|
</blockquote>
|
|
</div>
|
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</section>
|
|
<section id="eliminate_distinct_on">
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<input id="eliminate_distinct_on-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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|
<span class="def">def</span>
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<span class="name">eliminate_distinct_on</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="eliminate_distinct_on-view-source"><span>View Source</span></label>
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</div>
|
|
<a class="headerlink" href="#eliminate_distinct_on"></a>
|
|
<div class="pdoc-code codehilite"><pre><span></span><span id="eliminate_distinct_on-168"><a href="#eliminate_distinct_on-168"><span class="linenos">168</span></a><span class="k">def</span><span class="w"> </span><span class="nf">eliminate_distinct_on</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="eliminate_distinct_on-169"><a href="#eliminate_distinct_on-169"><span class="linenos">169</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="eliminate_distinct_on-170"><a href="#eliminate_distinct_on-170"><span class="linenos">170</span></a><span class="sd"> Convert SELECT DISTINCT ON statements to a subquery with a window function.</span>
|
|
</span><span id="eliminate_distinct_on-171"><a href="#eliminate_distinct_on-171"><span class="linenos">171</span></a>
|
|
</span><span id="eliminate_distinct_on-172"><a href="#eliminate_distinct_on-172"><span class="linenos">172</span></a><span class="sd"> This is useful for dialects that don't support SELECT DISTINCT ON but support window functions.</span>
|
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</span><span id="eliminate_distinct_on-173"><a href="#eliminate_distinct_on-173"><span class="linenos">173</span></a>
|
|
</span><span id="eliminate_distinct_on-174"><a href="#eliminate_distinct_on-174"><span class="linenos">174</span></a><span class="sd"> Args:</span>
|
|
</span><span id="eliminate_distinct_on-175"><a href="#eliminate_distinct_on-175"><span class="linenos">175</span></a><span class="sd"> expression: the expression that will be transformed.</span>
|
|
</span><span id="eliminate_distinct_on-176"><a href="#eliminate_distinct_on-176"><span class="linenos">176</span></a>
|
|
</span><span id="eliminate_distinct_on-177"><a href="#eliminate_distinct_on-177"><span class="linenos">177</span></a><span class="sd"> Returns:</span>
|
|
</span><span id="eliminate_distinct_on-178"><a href="#eliminate_distinct_on-178"><span class="linenos">178</span></a><span class="sd"> The transformed expression.</span>
|
|
</span><span id="eliminate_distinct_on-179"><a href="#eliminate_distinct_on-179"><span class="linenos">179</span></a><span class="sd"> """</span>
|
|
</span><span id="eliminate_distinct_on-180"><a href="#eliminate_distinct_on-180"><span class="linenos">180</span></a> <span class="k">if</span> <span class="p">(</span>
|
|
</span><span id="eliminate_distinct_on-181"><a href="#eliminate_distinct_on-181"><span class="linenos">181</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span>
|
|
</span><span id="eliminate_distinct_on-182"><a href="#eliminate_distinct_on-182"><span class="linenos">182</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"distinct"</span><span class="p">)</span>
|
|
</span><span id="eliminate_distinct_on-183"><a href="#eliminate_distinct_on-183"><span class="linenos">183</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"distinct"</span><span class="p">]</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">),</span> <span class="n">exp</span><span class="o">.</span><span class="n">Tuple</span><span class="p">)</span>
|
|
</span><span id="eliminate_distinct_on-184"><a href="#eliminate_distinct_on-184"><span class="linenos">184</span></a> <span class="p">):</span>
|
|
</span><span id="eliminate_distinct_on-185"><a href="#eliminate_distinct_on-185"><span class="linenos">185</span></a> <span class="n">row_number_window_alias</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">,</span> <span class="s2">"_row_number"</span><span class="p">)</span>
|
|
</span><span id="eliminate_distinct_on-186"><a href="#eliminate_distinct_on-186"><span class="linenos">186</span></a>
|
|
</span><span id="eliminate_distinct_on-187"><a href="#eliminate_distinct_on-187"><span class="linenos">187</span></a> <span class="n">distinct_cols</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"distinct"</span><span class="p">]</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"on"</span><span class="p">]</span><span class="o">.</span><span class="n">expressions</span>
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</span><span id="eliminate_distinct_on-188"><a href="#eliminate_distinct_on-188"><span class="linenos">188</span></a> <span class="n">window</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">RowNumber</span><span class="p">(),</span> <span class="n">partition_by</span><span class="o">=</span><span class="n">distinct_cols</span><span class="p">)</span>
|
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</span><span id="eliminate_distinct_on-189"><a href="#eliminate_distinct_on-189"><span class="linenos">189</span></a>
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</span><span id="eliminate_distinct_on-190"><a href="#eliminate_distinct_on-190"><span class="linenos">190</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">)</span>
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</span><span id="eliminate_distinct_on-191"><a href="#eliminate_distinct_on-191"><span class="linenos">191</span></a> <span class="k">if</span> <span class="n">order</span><span class="p">:</span>
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|
</span><span id="eliminate_distinct_on-192"><a href="#eliminate_distinct_on-192"><span class="linenos">192</span></a> <span class="n">window</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">order</span><span class="o">.</span><span class="n">pop</span><span class="p">())</span>
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</span><span id="eliminate_distinct_on-193"><a href="#eliminate_distinct_on-193"><span class="linenos">193</span></a> <span class="k">else</span><span class="p">:</span>
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</span><span id="eliminate_distinct_on-194"><a href="#eliminate_distinct_on-194"><span class="linenos">194</span></a> <span class="n">window</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">c</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">distinct_cols</span><span class="p">]))</span>
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</span><span id="eliminate_distinct_on-195"><a href="#eliminate_distinct_on-195"><span class="linenos">195</span></a>
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</span><span id="eliminate_distinct_on-196"><a href="#eliminate_distinct_on-196"><span class="linenos">196</span></a> <span class="n">window</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">window</span><span class="p">,</span> <span class="n">row_number_window_alias</span><span class="p">)</span>
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</span><span id="eliminate_distinct_on-197"><a href="#eliminate_distinct_on-197"><span class="linenos">197</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">window</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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</span><span id="eliminate_distinct_on-198"><a href="#eliminate_distinct_on-198"><span class="linenos">198</span></a>
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</span><span id="eliminate_distinct_on-199"><a href="#eliminate_distinct_on-199"><span class="linenos">199</span></a> <span class="c1"># We add aliases to the projections so that we can safely reference them in the outer query</span>
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</span><span id="eliminate_distinct_on-200"><a href="#eliminate_distinct_on-200"><span class="linenos">200</span></a> <span class="n">new_selects</span> <span class="o">=</span> <span class="p">[]</span>
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</span><span id="eliminate_distinct_on-201"><a href="#eliminate_distinct_on-201"><span class="linenos">201</span></a> <span class="n">taken_names</span> <span class="o">=</span> <span class="p">{</span><span class="n">row_number_window_alias</span><span class="p">}</span>
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</span><span id="eliminate_distinct_on-202"><a href="#eliminate_distinct_on-202"><span class="linenos">202</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">[:</span><span class="o">-</span><span class="mi">1</span><span class="p">]:</span>
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</span><span id="eliminate_distinct_on-203"><a href="#eliminate_distinct_on-203"><span class="linenos">203</span></a> <span class="k">if</span> <span class="n">select</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span>
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</span><span id="eliminate_distinct_on-204"><a href="#eliminate_distinct_on-204"><span class="linenos">204</span></a> <span class="n">new_selects</span> <span class="o">=</span> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Star</span><span class="p">()]</span>
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</span><span id="eliminate_distinct_on-205"><a href="#eliminate_distinct_on-205"><span class="linenos">205</span></a> <span class="k">break</span>
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</span><span id="eliminate_distinct_on-206"><a href="#eliminate_distinct_on-206"><span class="linenos">206</span></a>
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</span><span id="eliminate_distinct_on-207"><a href="#eliminate_distinct_on-207"><span class="linenos">207</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span>
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</span><span id="eliminate_distinct_on-208"><a href="#eliminate_distinct_on-208"><span class="linenos">208</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken_names</span><span class="p">,</span> <span class="n">select</span><span class="o">.</span><span class="n">output_name</span> <span class="ow">or</span> <span class="s2">"_col"</span><span class="p">)</span>
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</span><span id="eliminate_distinct_on-209"><a href="#eliminate_distinct_on-209"><span class="linenos">209</span></a> <span class="n">quoted</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"quoted"</span><span class="p">)</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">else</span> <span class="kc">None</span>
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</span><span id="eliminate_distinct_on-210"><a href="#eliminate_distinct_on-210"><span class="linenos">210</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">alias</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="n">quoted</span><span class="p">))</span>
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</span><span id="eliminate_distinct_on-211"><a href="#eliminate_distinct_on-211"><span class="linenos">211</span></a>
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</span><span id="eliminate_distinct_on-212"><a href="#eliminate_distinct_on-212"><span class="linenos">212</span></a> <span class="n">taken_names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">output_name</span><span class="p">)</span>
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</span><span id="eliminate_distinct_on-213"><a href="#eliminate_distinct_on-213"><span class="linenos">213</span></a> <span class="n">new_selects</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">])</span>
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</span><span id="eliminate_distinct_on-214"><a href="#eliminate_distinct_on-214"><span class="linenos">214</span></a>
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</span><span id="eliminate_distinct_on-215"><a href="#eliminate_distinct_on-215"><span class="linenos">215</span></a> <span class="k">return</span> <span class="p">(</span>
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</span><span id="eliminate_distinct_on-216"><a href="#eliminate_distinct_on-216"><span class="linenos">216</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">new_selects</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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</span><span id="eliminate_distinct_on-217"><a href="#eliminate_distinct_on-217"><span class="linenos">217</span></a> <span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="s2">"_t"</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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</span><span id="eliminate_distinct_on-218"><a href="#eliminate_distinct_on-218"><span class="linenos">218</span></a> <span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">row_number_window_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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</span><span id="eliminate_distinct_on-219"><a href="#eliminate_distinct_on-219"><span class="linenos">219</span></a> <span class="p">)</span>
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</span><span id="eliminate_distinct_on-220"><a href="#eliminate_distinct_on-220"><span class="linenos">220</span></a>
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</span><span id="eliminate_distinct_on-221"><a href="#eliminate_distinct_on-221"><span class="linenos">221</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span></pre></div>
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<div class="docstring"><p>Convert SELECT DISTINCT ON statements to a subquery with a window function.</p>
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|
<p>This is useful for dialects that don't support SELECT DISTINCT ON but support window functions.</p>
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<h6 id="arguments">Arguments:</h6>
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<ul>
|
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<li><strong>expression:</strong> the expression that will be transformed.</li>
|
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</ul>
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<h6 id="returns">Returns:</h6>
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|
|
<blockquote>
|
|
<p>The transformed expression.</p>
|
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</blockquote>
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</div>
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</section>
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<section id="eliminate_qualify">
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<input id="eliminate_qualify-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">eliminate_qualify</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="eliminate_qualify-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#eliminate_qualify"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="eliminate_qualify-224"><a href="#eliminate_qualify-224"><span class="linenos">224</span></a><span class="k">def</span><span class="w"> </span><span class="nf">eliminate_qualify</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="eliminate_qualify-225"><a href="#eliminate_qualify-225"><span class="linenos">225</span></a><span class="w"> </span><span class="sd">"""</span>
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</span><span id="eliminate_qualify-226"><a href="#eliminate_qualify-226"><span class="linenos">226</span></a><span class="sd"> Convert SELECT statements that contain the QUALIFY clause into subqueries, filtered equivalently.</span>
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</span><span id="eliminate_qualify-227"><a href="#eliminate_qualify-227"><span class="linenos">227</span></a>
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</span><span id="eliminate_qualify-228"><a href="#eliminate_qualify-228"><span class="linenos">228</span></a><span class="sd"> The idea behind this transformation can be seen in Snowflake's documentation for QUALIFY:</span>
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</span><span id="eliminate_qualify-229"><a href="#eliminate_qualify-229"><span class="linenos">229</span></a><span class="sd"> https://docs.snowflake.com/en/sql-reference/constructs/qualify</span>
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</span><span id="eliminate_qualify-230"><a href="#eliminate_qualify-230"><span class="linenos">230</span></a>
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</span><span id="eliminate_qualify-231"><a href="#eliminate_qualify-231"><span class="linenos">231</span></a><span class="sd"> Some dialects don't support window functions in the WHERE clause, so we need to include them as</span>
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</span><span id="eliminate_qualify-232"><a href="#eliminate_qualify-232"><span class="linenos">232</span></a><span class="sd"> projections in the subquery, in order to refer to them in the outer filter using aliases. Also,</span>
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</span><span id="eliminate_qualify-233"><a href="#eliminate_qualify-233"><span class="linenos">233</span></a><span class="sd"> if a column is referenced in the QUALIFY clause but is not selected, we need to include it too,</span>
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</span><span id="eliminate_qualify-234"><a href="#eliminate_qualify-234"><span class="linenos">234</span></a><span class="sd"> otherwise we won't be able to refer to it in the outer query's WHERE clause. Finally, if a</span>
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</span><span id="eliminate_qualify-235"><a href="#eliminate_qualify-235"><span class="linenos">235</span></a><span class="sd"> newly aliased projection is referenced in the QUALIFY clause, it will be replaced by the</span>
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</span><span id="eliminate_qualify-236"><a href="#eliminate_qualify-236"><span class="linenos">236</span></a><span class="sd"> corresponding expression to avoid creating invalid column references.</span>
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</span><span id="eliminate_qualify-237"><a href="#eliminate_qualify-237"><span class="linenos">237</span></a><span class="sd"> """</span>
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</span><span id="eliminate_qualify-238"><a href="#eliminate_qualify-238"><span class="linenos">238</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"qualify"</span><span class="p">):</span>
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</span><span id="eliminate_qualify-239"><a href="#eliminate_qualify-239"><span class="linenos">239</span></a> <span class="n">taken</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">)</span>
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</span><span id="eliminate_qualify-240"><a href="#eliminate_qualify-240"><span class="linenos">240</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span>
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</span><span id="eliminate_qualify-241"><a href="#eliminate_qualify-241"><span class="linenos">241</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span>
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</span><span id="eliminate_qualify-242"><a href="#eliminate_qualify-242"><span class="linenos">242</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="p">,</span> <span class="s2">"_c"</span><span class="p">)</span>
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|
</span><span id="eliminate_qualify-243"><a href="#eliminate_qualify-243"><span class="linenos">243</span></a> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">alias</span><span class="p">))</span>
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</span><span id="eliminate_qualify-244"><a href="#eliminate_qualify-244"><span class="linenos">244</span></a> <span class="n">taken</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span>
|
|
</span><span id="eliminate_qualify-245"><a href="#eliminate_qualify-245"><span class="linenos">245</span></a>
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|
</span><span id="eliminate_qualify-246"><a href="#eliminate_qualify-246"><span class="linenos">246</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_select_alias_or_name</span><span class="p">(</span><span class="n">select</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span> <span class="o">|</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">:</span>
|
|
</span><span id="eliminate_qualify-247"><a href="#eliminate_qualify-247"><span class="linenos">247</span></a> <span class="n">alias_or_name</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span>
|
|
</span><span id="eliminate_qualify-248"><a href="#eliminate_qualify-248"><span class="linenos">248</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="eliminate_qualify-249"><a href="#eliminate_qualify-249"><span class="linenos">249</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">):</span>
|
|
</span><span id="eliminate_qualify-250"><a href="#eliminate_qualify-250"><span class="linenos">250</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="n">identifier</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"quoted"</span><span class="p">))</span>
|
|
</span><span id="eliminate_qualify-251"><a href="#eliminate_qualify-251"><span class="linenos">251</span></a> <span class="k">return</span> <span class="n">alias_or_name</span>
|
|
</span><span id="eliminate_qualify-252"><a href="#eliminate_qualify-252"><span class="linenos">252</span></a>
|
|
</span><span id="eliminate_qualify-253"><a href="#eliminate_qualify-253"><span class="linenos">253</span></a> <span class="n">outer_selects</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="nb">list</span><span class="p">(</span><span class="nb">map</span><span class="p">(</span><span class="n">_select_alias_or_name</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">)))</span>
|
|
</span><span id="eliminate_qualify-254"><a href="#eliminate_qualify-254"><span class="linenos">254</span></a> <span class="n">qualify_filters</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"qualify"</span><span class="p">]</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="eliminate_qualify-255"><a href="#eliminate_qualify-255"><span class="linenos">255</span></a> <span class="n">expression_by_alias</span> <span class="o">=</span> <span class="p">{</span>
|
|
</span><span id="eliminate_qualify-256"><a href="#eliminate_qualify-256"><span class="linenos">256</span></a> <span class="n">select</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="eliminate_qualify-257"><a href="#eliminate_qualify-257"><span class="linenos">257</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">selects</span>
|
|
</span><span id="eliminate_qualify-258"><a href="#eliminate_qualify-258"><span class="linenos">258</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span>
|
|
</span><span id="eliminate_qualify-259"><a href="#eliminate_qualify-259"><span class="linenos">259</span></a> <span class="p">}</span>
|
|
</span><span id="eliminate_qualify-260"><a href="#eliminate_qualify-260"><span class="linenos">260</span></a>
|
|
</span><span id="eliminate_qualify-261"><a href="#eliminate_qualify-261"><span class="linenos">261</span></a> <span class="n">select_candidates</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Window</span> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">is_star</span> <span class="k">else</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span>
|
|
</span><span id="eliminate_qualify-262"><a href="#eliminate_qualify-262"><span class="linenos">262</span></a> <span class="k">for</span> <span class="n">select_candidate</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="n">qualify_filters</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">select_candidates</span><span class="p">)):</span>
|
|
</span><span id="eliminate_qualify-263"><a href="#eliminate_qualify-263"><span class="linenos">263</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select_candidate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">):</span>
|
|
</span><span id="eliminate_qualify-264"><a href="#eliminate_qualify-264"><span class="linenos">264</span></a> <span class="k">if</span> <span class="n">expression_by_alias</span><span class="p">:</span>
|
|
</span><span id="eliminate_qualify-265"><a href="#eliminate_qualify-265"><span class="linenos">265</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">select_candidate</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span>
|
|
</span><span id="eliminate_qualify-266"><a href="#eliminate_qualify-266"><span class="linenos">266</span></a> <span class="n">expr</span> <span class="o">=</span> <span class="n">expression_by_alias</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
|
|
</span><span id="eliminate_qualify-267"><a href="#eliminate_qualify-267"><span class="linenos">267</span></a> <span class="k">if</span> <span class="n">expr</span><span class="p">:</span>
|
|
</span><span id="eliminate_qualify-268"><a href="#eliminate_qualify-268"><span class="linenos">268</span></a> <span class="n">column</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">expr</span><span class="p">)</span>
|
|
</span><span id="eliminate_qualify-269"><a href="#eliminate_qualify-269"><span class="linenos">269</span></a>
|
|
</span><span id="eliminate_qualify-270"><a href="#eliminate_qualify-270"><span class="linenos">270</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">,</span> <span class="s2">"_w"</span><span class="p">)</span>
|
|
</span><span id="eliminate_qualify-271"><a href="#eliminate_qualify-271"><span class="linenos">271</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select_candidate</span><span class="p">,</span> <span class="n">alias</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
|
</span><span id="eliminate_qualify-272"><a href="#eliminate_qualify-272"><span class="linenos">272</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span>
|
|
</span><span id="eliminate_qualify-273"><a href="#eliminate_qualify-273"><span class="linenos">273</span></a>
|
|
</span><span id="eliminate_qualify-274"><a href="#eliminate_qualify-274"><span class="linenos">274</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select_candidate</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Qualify</span><span class="p">):</span>
|
|
</span><span id="eliminate_qualify-275"><a href="#eliminate_qualify-275"><span class="linenos">275</span></a> <span class="n">qualify_filters</span> <span class="o">=</span> <span class="n">column</span>
|
|
</span><span id="eliminate_qualify-276"><a href="#eliminate_qualify-276"><span class="linenos">276</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="eliminate_qualify-277"><a href="#eliminate_qualify-277"><span class="linenos">277</span></a> <span class="n">select_candidate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">)</span>
|
|
</span><span id="eliminate_qualify-278"><a href="#eliminate_qualify-278"><span class="linenos">278</span></a> <span class="k">elif</span> <span class="n">select_candidate</span><span class="o">.</span><span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">:</span>
|
|
</span><span id="eliminate_qualify-279"><a href="#eliminate_qualify-279"><span class="linenos">279</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">select_candidate</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
|
</span><span id="eliminate_qualify-280"><a href="#eliminate_qualify-280"><span class="linenos">280</span></a>
|
|
</span><span id="eliminate_qualify-281"><a href="#eliminate_qualify-281"><span class="linenos">281</span></a> <span class="k">return</span> <span class="n">outer_selects</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="n">alias</span><span class="o">=</span><span class="s2">"_t"</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span><span class="o">.</span><span class="n">where</span><span class="p">(</span>
|
|
</span><span id="eliminate_qualify-282"><a href="#eliminate_qualify-282"><span class="linenos">282</span></a> <span class="n">qualify_filters</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span>
|
|
</span><span id="eliminate_qualify-283"><a href="#eliminate_qualify-283"><span class="linenos">283</span></a> <span class="p">)</span>
|
|
</span><span id="eliminate_qualify-284"><a href="#eliminate_qualify-284"><span class="linenos">284</span></a>
|
|
</span><span id="eliminate_qualify-285"><a href="#eliminate_qualify-285"><span class="linenos">285</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Convert SELECT statements that contain the QUALIFY clause into subqueries, filtered equivalently.</p>
|
|
|
|
<p>The idea behind this transformation can be seen in Snowflake's documentation for QUALIFY:
|
|
<a href="https://docs.snowflake.com/en/sql-reference/constructs/qualify">https://docs.snowflake.com/en/sql-reference/constructs/qualify</a></p>
|
|
|
|
<p>Some dialects don't support window functions in the WHERE clause, so we need to include them as
|
|
projections in the subquery, in order to refer to them in the outer filter using aliases. Also,
|
|
if a column is referenced in the QUALIFY clause but is not selected, we need to include it too,
|
|
otherwise we won't be able to refer to it in the outer query's WHERE clause. Finally, if a
|
|
newly aliased projection is referenced in the QUALIFY clause, it will be replaced by the
|
|
corresponding expression to avoid creating invalid column references.</p>
|
|
</div>
|
|
|
|
|
|
</section>
|
|
<section id="remove_precision_parameterized_types">
|
|
<input id="remove_precision_parameterized_types-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
|
<div class="attr function">
|
|
|
|
<span class="def">def</span>
|
|
<span class="name">remove_precision_parameterized_types</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
|
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|
|
<label class="view-source-button" for="remove_precision_parameterized_types-view-source"><span>View Source</span></label>
|
|
|
|
</div>
|
|
<a class="headerlink" href="#remove_precision_parameterized_types"></a>
|
|
<div class="pdoc-code codehilite"><pre><span></span><span id="remove_precision_parameterized_types-288"><a href="#remove_precision_parameterized_types-288"><span class="linenos">288</span></a><span class="k">def</span><span class="w"> </span><span class="nf">remove_precision_parameterized_types</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="remove_precision_parameterized_types-289"><a href="#remove_precision_parameterized_types-289"><span class="linenos">289</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="remove_precision_parameterized_types-290"><a href="#remove_precision_parameterized_types-290"><span class="linenos">290</span></a><span class="sd"> Some dialects only allow the precision for parameterized types to be defined in the DDL and not in</span>
|
|
</span><span id="remove_precision_parameterized_types-291"><a href="#remove_precision_parameterized_types-291"><span class="linenos">291</span></a><span class="sd"> other expressions. This transforms removes the precision from parameterized types in expressions.</span>
|
|
</span><span id="remove_precision_parameterized_types-292"><a href="#remove_precision_parameterized_types-292"><span class="linenos">292</span></a><span class="sd"> """</span>
|
|
</span><span id="remove_precision_parameterized_types-293"><a href="#remove_precision_parameterized_types-293"><span class="linenos">293</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">):</span>
|
|
</span><span id="remove_precision_parameterized_types-294"><a href="#remove_precision_parameterized_types-294"><span class="linenos">294</span></a> <span class="n">node</span><span class="o">.</span><span class="n">set</span><span class="p">(</span>
|
|
</span><span id="remove_precision_parameterized_types-295"><a href="#remove_precision_parameterized_types-295"><span class="linenos">295</span></a> <span class="s2">"expressions"</span><span class="p">,</span> <span class="p">[</span><span class="n">e</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">expressions</span> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataTypeParam</span><span class="p">)]</span>
|
|
</span><span id="remove_precision_parameterized_types-296"><a href="#remove_precision_parameterized_types-296"><span class="linenos">296</span></a> <span class="p">)</span>
|
|
</span><span id="remove_precision_parameterized_types-297"><a href="#remove_precision_parameterized_types-297"><span class="linenos">297</span></a>
|
|
</span><span id="remove_precision_parameterized_types-298"><a href="#remove_precision_parameterized_types-298"><span class="linenos">298</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Some dialects only allow the precision for parameterized types to be defined in the DDL and not in
|
|
other expressions. This transforms removes the precision from parameterized types in expressions.</p>
|
|
</div>
|
|
|
|
|
|
</section>
|
|
<section id="unqualify_unnest">
|
|
<input id="unqualify_unnest-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
|
<div class="attr function">
|
|
|
|
<span class="def">def</span>
|
|
<span class="name">unqualify_unnest</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
|
|
|
|
<label class="view-source-button" for="unqualify_unnest-view-source"><span>View Source</span></label>
|
|
|
|
</div>
|
|
<a class="headerlink" href="#unqualify_unnest"></a>
|
|
<div class="pdoc-code codehilite"><pre><span></span><span id="unqualify_unnest-301"><a href="#unqualify_unnest-301"><span class="linenos">301</span></a><span class="k">def</span><span class="w"> </span><span class="nf">unqualify_unnest</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="unqualify_unnest-302"><a href="#unqualify_unnest-302"><span class="linenos">302</span></a><span class="w"> </span><span class="sd">"""Remove references to unnest table aliases, added by the optimizer's qualify_columns step."""</span>
|
|
</span><span id="unqualify_unnest-303"><a href="#unqualify_unnest-303"><span class="linenos">303</span></a> <span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.optimizer.scope</span><span class="w"> </span><span class="kn">import</span> <span class="n">find_all_in_scope</span>
|
|
</span><span id="unqualify_unnest-304"><a href="#unqualify_unnest-304"><span class="linenos">304</span></a>
|
|
</span><span id="unqualify_unnest-305"><a href="#unqualify_unnest-305"><span class="linenos">305</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
|
|
</span><span id="unqualify_unnest-306"><a href="#unqualify_unnest-306"><span class="linenos">306</span></a> <span class="n">unnest_aliases</span> <span class="o">=</span> <span class="p">{</span>
|
|
</span><span id="unqualify_unnest-307"><a href="#unqualify_unnest-307"><span class="linenos">307</span></a> <span class="n">unnest</span><span class="o">.</span><span class="n">alias</span>
|
|
</span><span id="unqualify_unnest-308"><a href="#unqualify_unnest-308"><span class="linenos">308</span></a> <span class="k">for</span> <span class="n">unnest</span> <span class="ow">in</span> <span class="n">find_all_in_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">)</span>
|
|
</span><span id="unqualify_unnest-309"><a href="#unqualify_unnest-309"><span class="linenos">309</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnest</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">))</span>
|
|
</span><span id="unqualify_unnest-310"><a href="#unqualify_unnest-310"><span class="linenos">310</span></a> <span class="p">}</span>
|
|
</span><span id="unqualify_unnest-311"><a href="#unqualify_unnest-311"><span class="linenos">311</span></a> <span class="k">if</span> <span class="n">unnest_aliases</span><span class="p">:</span>
|
|
</span><span id="unqualify_unnest-312"><a href="#unqualify_unnest-312"><span class="linenos">312</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span>
|
|
</span><span id="unqualify_unnest-313"><a href="#unqualify_unnest-313"><span class="linenos">313</span></a> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="ow">in</span> <span class="n">unnest_aliases</span><span class="p">:</span>
|
|
</span><span id="unqualify_unnest-314"><a href="#unqualify_unnest-314"><span class="linenos">314</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
|
|
</span><span id="unqualify_unnest-315"><a href="#unqualify_unnest-315"><span class="linenos">315</span></a> <span class="k">elif</span> <span class="n">column</span><span class="o">.</span><span class="n">db</span> <span class="ow">in</span> <span class="n">unnest_aliases</span><span class="p">:</span>
|
|
</span><span id="unqualify_unnest-316"><a href="#unqualify_unnest-316"><span class="linenos">316</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"db"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
|
|
</span><span id="unqualify_unnest-317"><a href="#unqualify_unnest-317"><span class="linenos">317</span></a>
|
|
</span><span id="unqualify_unnest-318"><a href="#unqualify_unnest-318"><span class="linenos">318</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Remove references to unnest table aliases, added by the optimizer's qualify_columns step.</p>
|
|
</div>
|
|
|
|
|
|
</section>
|
|
<section id="unnest_to_explode">
|
|
<input id="unnest_to_explode-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
|
<div class="attr function">
|
|
|
|
<span class="def">def</span>
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<span class="name">unnest_to_explode</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>,</span><span class="param"> <span class="n">unnest_using_arrays_zip</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="unnest_to_explode-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#unnest_to_explode"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="unnest_to_explode-321"><a href="#unnest_to_explode-321"><span class="linenos">321</span></a><span class="k">def</span><span class="w"> </span><span class="nf">unnest_to_explode</span><span class="p">(</span>
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</span><span id="unnest_to_explode-322"><a href="#unnest_to_explode-322"><span class="linenos">322</span></a> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">,</span>
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</span><span id="unnest_to_explode-323"><a href="#unnest_to_explode-323"><span class="linenos">323</span></a> <span class="n">unnest_using_arrays_zip</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">,</span>
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</span><span id="unnest_to_explode-324"><a href="#unnest_to_explode-324"><span class="linenos">324</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="unnest_to_explode-325"><a href="#unnest_to_explode-325"><span class="linenos">325</span></a><span class="w"> </span><span class="sd">"""Convert cross join unnest into lateral view explode."""</span>
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</span><span id="unnest_to_explode-326"><a href="#unnest_to_explode-326"><span class="linenos">326</span></a>
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</span><span id="unnest_to_explode-327"><a href="#unnest_to_explode-327"><span class="linenos">327</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_unnest_zip_exprs</span><span class="p">(</span>
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</span><span id="unnest_to_explode-328"><a href="#unnest_to_explode-328"><span class="linenos">328</span></a> <span class="n">u</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">,</span> <span class="n">unnest_exprs</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">has_multi_expr</span><span class="p">:</span> <span class="nb">bool</span>
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</span><span id="unnest_to_explode-329"><a href="#unnest_to_explode-329"><span class="linenos">329</span></a> <span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
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</span><span id="unnest_to_explode-330"><a href="#unnest_to_explode-330"><span class="linenos">330</span></a> <span class="k">if</span> <span class="n">has_multi_expr</span><span class="p">:</span>
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</span><span id="unnest_to_explode-331"><a href="#unnest_to_explode-331"><span class="linenos">331</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">unnest_using_arrays_zip</span><span class="p">:</span>
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</span><span id="unnest_to_explode-332"><a href="#unnest_to_explode-332"><span class="linenos">332</span></a> <span class="k">raise</span> <span class="n">UnsupportedError</span><span class="p">(</span><span class="s2">"Cannot transpile UNNEST with multiple input arrays"</span><span class="p">)</span>
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</span><span id="unnest_to_explode-333"><a href="#unnest_to_explode-333"><span class="linenos">333</span></a>
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</span><span id="unnest_to_explode-334"><a href="#unnest_to_explode-334"><span class="linenos">334</span></a> <span class="c1"># Use INLINE(ARRAYS_ZIP(...)) for multiple expressions</span>
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</span><span id="unnest_to_explode-335"><a href="#unnest_to_explode-335"><span class="linenos">335</span></a> <span class="n">zip_exprs</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span>
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</span><span id="unnest_to_explode-336"><a href="#unnest_to_explode-336"><span class="linenos">336</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Anonymous</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="s2">"ARRAYS_ZIP"</span><span class="p">,</span> <span class="n">expressions</span><span class="o">=</span><span class="n">unnest_exprs</span><span class="p">)</span>
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</span><span id="unnest_to_explode-337"><a href="#unnest_to_explode-337"><span class="linenos">337</span></a> <span class="p">]</span>
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</span><span id="unnest_to_explode-338"><a href="#unnest_to_explode-338"><span class="linenos">338</span></a> <span class="n">u</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">zip_exprs</span><span class="p">)</span>
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</span><span id="unnest_to_explode-339"><a href="#unnest_to_explode-339"><span class="linenos">339</span></a> <span class="k">return</span> <span class="n">zip_exprs</span>
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</span><span id="unnest_to_explode-340"><a href="#unnest_to_explode-340"><span class="linenos">340</span></a> <span class="k">return</span> <span class="n">unnest_exprs</span>
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</span><span id="unnest_to_explode-341"><a href="#unnest_to_explode-341"><span class="linenos">341</span></a>
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</span><span id="unnest_to_explode-342"><a href="#unnest_to_explode-342"><span class="linenos">342</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_udtf_type</span><span class="p">(</span><span class="n">u</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">,</span> <span class="n">has_multi_expr</span><span class="p">:</span> <span class="nb">bool</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Type</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Func</span><span class="p">]:</span>
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</span><span id="unnest_to_explode-343"><a href="#unnest_to_explode-343"><span class="linenos">343</span></a> <span class="k">if</span> <span class="n">u</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"offset"</span><span class="p">):</span>
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</span><span id="unnest_to_explode-344"><a href="#unnest_to_explode-344"><span class="linenos">344</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Posexplode</span>
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</span><span id="unnest_to_explode-345"><a href="#unnest_to_explode-345"><span class="linenos">345</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Inline</span> <span class="k">if</span> <span class="n">has_multi_expr</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">Explode</span>
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</span><span id="unnest_to_explode-346"><a href="#unnest_to_explode-346"><span class="linenos">346</span></a>
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</span><span id="unnest_to_explode-347"><a href="#unnest_to_explode-347"><span class="linenos">347</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
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</span><span id="unnest_to_explode-348"><a href="#unnest_to_explode-348"><span class="linenos">348</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span>
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</span><span id="unnest_to_explode-349"><a href="#unnest_to_explode-349"><span class="linenos">349</span></a>
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</span><span id="unnest_to_explode-350"><a href="#unnest_to_explode-350"><span class="linenos">350</span></a> <span class="k">if</span> <span class="n">from_</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">):</span>
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</span><span id="unnest_to_explode-351"><a href="#unnest_to_explode-351"><span class="linenos">351</span></a> <span class="n">unnest</span> <span class="o">=</span> <span class="n">from_</span><span class="o">.</span><span class="n">this</span>
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</span><span id="unnest_to_explode-352"><a href="#unnest_to_explode-352"><span class="linenos">352</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span>
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</span><span id="unnest_to_explode-353"><a href="#unnest_to_explode-353"><span class="linenos">353</span></a> <span class="n">exprs</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span>
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</span><span id="unnest_to_explode-354"><a href="#unnest_to_explode-354"><span class="linenos">354</span></a> <span class="n">has_multi_expr</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">exprs</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span>
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</span><span id="unnest_to_explode-355"><a href="#unnest_to_explode-355"><span class="linenos">355</span></a> <span class="n">this</span><span class="p">,</span> <span class="o">*</span><span class="n">expressions</span> <span class="o">=</span> <span class="n">_unnest_zip_exprs</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">exprs</span><span class="p">,</span> <span class="n">has_multi_expr</span><span class="p">)</span>
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</span><span id="unnest_to_explode-356"><a href="#unnest_to_explode-356"><span class="linenos">356</span></a>
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</span><span id="unnest_to_explode-357"><a href="#unnest_to_explode-357"><span class="linenos">357</span></a> <span class="n">unnest</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span>
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</span><span id="unnest_to_explode-358"><a href="#unnest_to_explode-358"><span class="linenos">358</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">(</span>
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</span><span id="unnest_to_explode-359"><a href="#unnest_to_explode-359"><span class="linenos">359</span></a> <span class="n">this</span><span class="o">=</span><span class="n">_udtf_type</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">has_multi_expr</span><span class="p">)(</span>
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</span><span id="unnest_to_explode-360"><a href="#unnest_to_explode-360"><span class="linenos">360</span></a> <span class="n">this</span><span class="o">=</span><span class="n">this</span><span class="p">,</span>
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</span><span id="unnest_to_explode-361"><a href="#unnest_to_explode-361"><span class="linenos">361</span></a> <span class="n">expressions</span><span class="o">=</span><span class="n">expressions</span><span class="p">,</span>
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</span><span id="unnest_to_explode-362"><a href="#unnest_to_explode-362"><span class="linenos">362</span></a> <span class="p">),</span>
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</span><span id="unnest_to_explode-363"><a href="#unnest_to_explode-363"><span class="linenos">363</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">alias</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">columns</span><span class="o">=</span><span class="n">alias</span><span class="o">.</span><span class="n">columns</span><span class="p">)</span> <span class="k">if</span> <span class="n">alias</span> <span class="k">else</span> <span class="kc">None</span><span class="p">,</span>
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</span><span id="unnest_to_explode-364"><a href="#unnest_to_explode-364"><span class="linenos">364</span></a> <span class="p">)</span>
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</span><span id="unnest_to_explode-365"><a href="#unnest_to_explode-365"><span class="linenos">365</span></a> <span class="p">)</span>
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</span><span id="unnest_to_explode-366"><a href="#unnest_to_explode-366"><span class="linenos">366</span></a>
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</span><span id="unnest_to_explode-367"><a href="#unnest_to_explode-367"><span class="linenos">367</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]</span>
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</span><span id="unnest_to_explode-368"><a href="#unnest_to_explode-368"><span class="linenos">368</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="n">joins</span><span class="p">):</span>
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</span><span id="unnest_to_explode-369"><a href="#unnest_to_explode-369"><span class="linenos">369</span></a> <span class="n">join_expr</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span>
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</span><span id="unnest_to_explode-370"><a href="#unnest_to_explode-370"><span class="linenos">370</span></a>
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</span><span id="unnest_to_explode-371"><a href="#unnest_to_explode-371"><span class="linenos">371</span></a> <span class="n">is_lateral</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">join_expr</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Lateral</span><span class="p">)</span>
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</span><span id="unnest_to_explode-372"><a href="#unnest_to_explode-372"><span class="linenos">372</span></a>
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</span><span id="unnest_to_explode-373"><a href="#unnest_to_explode-373"><span class="linenos">373</span></a> <span class="n">unnest</span> <span class="o">=</span> <span class="n">join_expr</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="n">is_lateral</span> <span class="k">else</span> <span class="n">join_expr</span>
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</span><span id="unnest_to_explode-374"><a href="#unnest_to_explode-374"><span class="linenos">374</span></a>
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</span><span id="unnest_to_explode-375"><a href="#unnest_to_explode-375"><span class="linenos">375</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">):</span>
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</span><span id="unnest_to_explode-376"><a href="#unnest_to_explode-376"><span class="linenos">376</span></a> <span class="k">if</span> <span class="n">is_lateral</span><span class="p">:</span>
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</span><span id="unnest_to_explode-377"><a href="#unnest_to_explode-377"><span class="linenos">377</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">join_expr</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span>
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</span><span id="unnest_to_explode-378"><a href="#unnest_to_explode-378"><span class="linenos">378</span></a> <span class="k">else</span><span class="p">:</span>
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</span><span id="unnest_to_explode-379"><a href="#unnest_to_explode-379"><span class="linenos">379</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span>
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</span><span id="unnest_to_explode-380"><a href="#unnest_to_explode-380"><span class="linenos">380</span></a> <span class="n">exprs</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span>
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</span><span id="unnest_to_explode-381"><a href="#unnest_to_explode-381"><span class="linenos">381</span></a> <span class="c1"># The number of unnest.expressions will be changed by _unnest_zip_exprs, we need to record it here</span>
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</span><span id="unnest_to_explode-382"><a href="#unnest_to_explode-382"><span class="linenos">382</span></a> <span class="n">has_multi_expr</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">exprs</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span>
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</span><span id="unnest_to_explode-383"><a href="#unnest_to_explode-383"><span class="linenos">383</span></a> <span class="n">exprs</span> <span class="o">=</span> <span class="n">_unnest_zip_exprs</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">exprs</span><span class="p">,</span> <span class="n">has_multi_expr</span><span class="p">)</span>
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</span><span id="unnest_to_explode-384"><a href="#unnest_to_explode-384"><span class="linenos">384</span></a>
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</span><span id="unnest_to_explode-385"><a href="#unnest_to_explode-385"><span class="linenos">385</span></a> <span class="n">joins</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">join</span><span class="p">)</span>
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</span><span id="unnest_to_explode-386"><a href="#unnest_to_explode-386"><span class="linenos">386</span></a>
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</span><span id="unnest_to_explode-387"><a href="#unnest_to_explode-387"><span class="linenos">387</span></a> <span class="n">alias_cols</span> <span class="o">=</span> <span class="n">alias</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">alias</span> <span class="k">else</span> <span class="p">[]</span>
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</span><span id="unnest_to_explode-388"><a href="#unnest_to_explode-388"><span class="linenos">388</span></a>
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</span><span id="unnest_to_explode-389"><a href="#unnest_to_explode-389"><span class="linenos">389</span></a> <span class="c1"># # Handle UNNEST to LATERAL VIEW EXPLODE: Exception is raised when there are 0 or > 2 aliases</span>
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</span><span id="unnest_to_explode-390"><a href="#unnest_to_explode-390"><span class="linenos">390</span></a> <span class="c1"># Spark LATERAL VIEW EXPLODE requires single alias for array/struct and two for Map type column unlike unnest in trino/presto which can take an arbitrary amount.</span>
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</span><span id="unnest_to_explode-391"><a href="#unnest_to_explode-391"><span class="linenos">391</span></a> <span class="c1"># Refs: https://spark.apache.org/docs/latest/sql-ref-syntax-qry-select-lateral-view.html</span>
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</span><span id="unnest_to_explode-392"><a href="#unnest_to_explode-392"><span class="linenos">392</span></a>
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</span><span id="unnest_to_explode-393"><a href="#unnest_to_explode-393"><span class="linenos">393</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">has_multi_expr</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">alias_cols</span><span class="p">)</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">):</span>
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</span><span id="unnest_to_explode-394"><a href="#unnest_to_explode-394"><span class="linenos">394</span></a> <span class="k">raise</span> <span class="n">UnsupportedError</span><span class="p">(</span>
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</span><span id="unnest_to_explode-395"><a href="#unnest_to_explode-395"><span class="linenos">395</span></a> <span class="s2">"CROSS JOIN UNNEST to LATERAL VIEW EXPLODE transformation requires explicit column aliases"</span>
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</span><span id="unnest_to_explode-396"><a href="#unnest_to_explode-396"><span class="linenos">396</span></a> <span class="p">)</span>
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</span><span id="unnest_to_explode-397"><a href="#unnest_to_explode-397"><span class="linenos">397</span></a>
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</span><span id="unnest_to_explode-398"><a href="#unnest_to_explode-398"><span class="linenos">398</span></a> <span class="k">for</span> <span class="n">e</span><span class="p">,</span> <span class="n">column</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">exprs</span><span class="p">,</span> <span class="n">alias_cols</span><span class="p">):</span>
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</span><span id="unnest_to_explode-399"><a href="#unnest_to_explode-399"><span class="linenos">399</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
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</span><span id="unnest_to_explode-400"><a href="#unnest_to_explode-400"><span class="linenos">400</span></a> <span class="s2">"laterals"</span><span class="p">,</span>
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</span><span id="unnest_to_explode-401"><a href="#unnest_to_explode-401"><span class="linenos">401</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Lateral</span><span class="p">(</span>
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</span><span id="unnest_to_explode-402"><a href="#unnest_to_explode-402"><span class="linenos">402</span></a> <span class="n">this</span><span class="o">=</span><span class="n">_udtf_type</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">has_multi_expr</span><span class="p">)(</span><span class="n">this</span><span class="o">=</span><span class="n">e</span><span class="p">),</span>
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</span><span id="unnest_to_explode-403"><a href="#unnest_to_explode-403"><span class="linenos">403</span></a> <span class="n">view</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
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</span><span id="unnest_to_explode-404"><a href="#unnest_to_explode-404"><span class="linenos">404</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span>
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</span><span id="unnest_to_explode-405"><a href="#unnest_to_explode-405"><span class="linenos">405</span></a> <span class="n">this</span><span class="o">=</span><span class="n">alias</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="c1"># type: ignore</span>
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</span><span id="unnest_to_explode-406"><a href="#unnest_to_explode-406"><span class="linenos">406</span></a> <span class="n">columns</span><span class="o">=</span><span class="n">alias_cols</span><span class="p">,</span>
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</span><span id="unnest_to_explode-407"><a href="#unnest_to_explode-407"><span class="linenos">407</span></a> <span class="p">),</span>
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</span><span id="unnest_to_explode-408"><a href="#unnest_to_explode-408"><span class="linenos">408</span></a> <span class="p">),</span>
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</span><span id="unnest_to_explode-409"><a href="#unnest_to_explode-409"><span class="linenos">409</span></a> <span class="p">)</span>
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</span><span id="unnest_to_explode-410"><a href="#unnest_to_explode-410"><span class="linenos">410</span></a>
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</span><span id="unnest_to_explode-411"><a href="#unnest_to_explode-411"><span class="linenos">411</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span></pre></div>
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<div class="docstring"><p>Convert cross join unnest into lateral view explode.</p>
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</div>
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</section>
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<section id="explode_projection_to_unnest">
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<input id="explode_projection_to_unnest-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">explode_projection_to_unnest</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">index_offset</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">0</span></span><span class="return-annotation">) -> <span class="n">Callable</span><span class="p">[[</span><span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span><span class="p">],</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span><span class="p">]</span>:</span></span>
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<label class="view-source-button" for="explode_projection_to_unnest-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#explode_projection_to_unnest"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="explode_projection_to_unnest-414"><a href="#explode_projection_to_unnest-414"><span class="linenos">414</span></a><span class="k">def</span><span class="w"> </span><span class="nf">explode_projection_to_unnest</span><span class="p">(</span>
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</span><span id="explode_projection_to_unnest-415"><a href="#explode_projection_to_unnest-415"><span class="linenos">415</span></a> <span class="n">index_offset</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span>
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</span><span id="explode_projection_to_unnest-416"><a href="#explode_projection_to_unnest-416"><span class="linenos">416</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
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</span><span id="explode_projection_to_unnest-417"><a href="#explode_projection_to_unnest-417"><span class="linenos">417</span></a><span class="w"> </span><span class="sd">"""Convert explode/posexplode projections into unnests."""</span>
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</span><span id="explode_projection_to_unnest-418"><a href="#explode_projection_to_unnest-418"><span class="linenos">418</span></a>
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</span><span id="explode_projection_to_unnest-419"><a href="#explode_projection_to_unnest-419"><span class="linenos">419</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_explode_projection_to_unnest</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="explode_projection_to_unnest-420"><a href="#explode_projection_to_unnest-420"><span class="linenos">420</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
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</span><span id="explode_projection_to_unnest-421"><a href="#explode_projection_to_unnest-421"><span class="linenos">421</span></a> <span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.optimizer.scope</span><span class="w"> </span><span class="kn">import</span> <span class="n">Scope</span>
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</span><span id="explode_projection_to_unnest-422"><a href="#explode_projection_to_unnest-422"><span class="linenos">422</span></a>
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</span><span id="explode_projection_to_unnest-423"><a href="#explode_projection_to_unnest-423"><span class="linenos">423</span></a> <span class="n">taken_select_names</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">)</span>
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</span><span id="explode_projection_to_unnest-424"><a href="#explode_projection_to_unnest-424"><span class="linenos">424</span></a> <span class="n">taken_source_names</span> <span class="o">=</span> <span class="p">{</span><span class="n">name</span> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">_</span> <span class="ow">in</span> <span class="n">Scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span><span class="o">.</span><span class="n">references</span><span class="p">}</span>
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</span><span id="explode_projection_to_unnest-425"><a href="#explode_projection_to_unnest-425"><span class="linenos">425</span></a>
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</span><span id="explode_projection_to_unnest-426"><a href="#explode_projection_to_unnest-426"><span class="linenos">426</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">new_name</span><span class="p">(</span><span class="n">names</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span>
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</span><span id="explode_projection_to_unnest-427"><a href="#explode_projection_to_unnest-427"><span class="linenos">427</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">names</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span>
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</span><span id="explode_projection_to_unnest-428"><a href="#explode_projection_to_unnest-428"><span class="linenos">428</span></a> <span class="n">names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
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</span><span id="explode_projection_to_unnest-429"><a href="#explode_projection_to_unnest-429"><span class="linenos">429</span></a> <span class="k">return</span> <span class="n">name</span>
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</span><span id="explode_projection_to_unnest-430"><a href="#explode_projection_to_unnest-430"><span class="linenos">430</span></a>
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</span><span id="explode_projection_to_unnest-431"><a href="#explode_projection_to_unnest-431"><span class="linenos">431</span></a> <span class="n">arrays</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">]</span> <span class="o">=</span> <span class="p">[]</span>
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</span><span id="explode_projection_to_unnest-432"><a href="#explode_projection_to_unnest-432"><span class="linenos">432</span></a> <span class="n">series_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span>
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</span><span id="explode_projection_to_unnest-433"><a href="#explode_projection_to_unnest-433"><span class="linenos">433</span></a> <span class="n">series</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span>
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</span><span id="explode_projection_to_unnest-434"><a href="#explode_projection_to_unnest-434"><span class="linenos">434</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span>
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</span><span id="explode_projection_to_unnest-435"><a href="#explode_projection_to_unnest-435"><span class="linenos">435</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">GenerateSeries</span><span class="p">(</span><span class="n">start</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">index_offset</span><span class="p">))]</span>
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</span><span id="explode_projection_to_unnest-436"><a href="#explode_projection_to_unnest-436"><span class="linenos">436</span></a> <span class="p">),</span>
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</span><span id="explode_projection_to_unnest-437"><a href="#explode_projection_to_unnest-437"><span class="linenos">437</span></a> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_source_names</span><span class="p">,</span> <span class="s2">"_u"</span><span class="p">),</span>
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</span><span id="explode_projection_to_unnest-438"><a href="#explode_projection_to_unnest-438"><span class="linenos">438</span></a> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">series_alias</span><span class="p">],</span>
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</span><span id="explode_projection_to_unnest-439"><a href="#explode_projection_to_unnest-439"><span class="linenos">439</span></a> <span class="p">)</span>
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</span><span id="explode_projection_to_unnest-440"><a href="#explode_projection_to_unnest-440"><span class="linenos">440</span></a>
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</span><span id="explode_projection_to_unnest-441"><a href="#explode_projection_to_unnest-441"><span class="linenos">441</span></a> <span class="c1"># we use list here because expression.selects is mutated inside the loop</span>
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</span><span id="explode_projection_to_unnest-442"><a href="#explode_projection_to_unnest-442"><span class="linenos">442</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
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</span><span id="explode_projection_to_unnest-443"><a href="#explode_projection_to_unnest-443"><span class="linenos">443</span></a> <span class="n">explode</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Explode</span><span class="p">)</span>
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</span><span id="explode_projection_to_unnest-444"><a href="#explode_projection_to_unnest-444"><span class="linenos">444</span></a>
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</span><span id="explode_projection_to_unnest-445"><a href="#explode_projection_to_unnest-445"><span class="linenos">445</span></a> <span class="k">if</span> <span class="n">explode</span><span class="p">:</span>
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</span><span id="explode_projection_to_unnest-446"><a href="#explode_projection_to_unnest-446"><span class="linenos">446</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="s2">""</span>
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</span><span id="explode_projection_to_unnest-447"><a href="#explode_projection_to_unnest-447"><span class="linenos">447</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="s2">""</span>
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</span><span id="explode_projection_to_unnest-448"><a href="#explode_projection_to_unnest-448"><span class="linenos">448</span></a>
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</span><span id="explode_projection_to_unnest-449"><a href="#explode_projection_to_unnest-449"><span class="linenos">449</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span>
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</span><span id="explode_projection_to_unnest-450"><a href="#explode_projection_to_unnest-450"><span class="linenos">450</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span>
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</span><span id="explode_projection_to_unnest-451"><a href="#explode_projection_to_unnest-451"><span class="linenos">451</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span>
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</span><span id="explode_projection_to_unnest-452"><a href="#explode_projection_to_unnest-452"><span class="linenos">452</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Aliases</span><span class="p">):</span>
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</span><span id="explode_projection_to_unnest-453"><a href="#explode_projection_to_unnest-453"><span class="linenos">453</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">aliases</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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</span><span id="explode_projection_to_unnest-454"><a href="#explode_projection_to_unnest-454"><span class="linenos">454</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">aliases</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
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</span><span id="explode_projection_to_unnest-455"><a href="#explode_projection_to_unnest-455"><span class="linenos">455</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="s2">""</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span>
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</span><span id="explode_projection_to_unnest-456"><a href="#explode_projection_to_unnest-456"><span class="linenos">456</span></a> <span class="k">else</span><span class="p">:</span>
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</span><span id="explode_projection_to_unnest-457"><a href="#explode_projection_to_unnest-457"><span class="linenos">457</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="s2">""</span><span class="p">))</span>
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</span><span id="explode_projection_to_unnest-458"><a href="#explode_projection_to_unnest-458"><span class="linenos">458</span></a> <span class="n">explode</span> <span class="o">=</span> <span class="n">alias</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Explode</span><span class="p">)</span>
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</span><span id="explode_projection_to_unnest-459"><a href="#explode_projection_to_unnest-459"><span class="linenos">459</span></a> <span class="k">assert</span> <span class="n">explode</span>
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</span><span id="explode_projection_to_unnest-460"><a href="#explode_projection_to_unnest-460"><span class="linenos">460</span></a>
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</span><span id="explode_projection_to_unnest-461"><a href="#explode_projection_to_unnest-461"><span class="linenos">461</span></a> <span class="n">is_posexplode</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Posexplode</span><span class="p">)</span>
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</span><span id="explode_projection_to_unnest-462"><a href="#explode_projection_to_unnest-462"><span class="linenos">462</span></a> <span class="n">explode_arg</span> <span class="o">=</span> <span class="n">explode</span><span class="o">.</span><span class="n">this</span>
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</span><span id="explode_projection_to_unnest-463"><a href="#explode_projection_to_unnest-463"><span class="linenos">463</span></a>
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</span><span id="explode_projection_to_unnest-464"><a href="#explode_projection_to_unnest-464"><span class="linenos">464</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ExplodeOuter</span><span class="p">):</span>
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</span><span id="explode_projection_to_unnest-465"><a href="#explode_projection_to_unnest-465"><span class="linenos">465</span></a> <span class="n">bracket</span> <span class="o">=</span> <span class="n">explode_arg</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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</span><span id="explode_projection_to_unnest-466"><a href="#explode_projection_to_unnest-466"><span class="linenos">466</span></a> <span class="n">bracket</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"safe"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
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</span><span id="explode_projection_to_unnest-467"><a href="#explode_projection_to_unnest-467"><span class="linenos">467</span></a> <span class="n">bracket</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"offset"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
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|
</span><span id="explode_projection_to_unnest-468"><a href="#explode_projection_to_unnest-468"><span class="linenos">468</span></a> <span class="n">explode_arg</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">func</span><span class="p">(</span>
|
|
</span><span id="explode_projection_to_unnest-469"><a href="#explode_projection_to_unnest-469"><span class="linenos">469</span></a> <span class="s2">"IF"</span><span class="p">,</span>
|
|
</span><span id="explode_projection_to_unnest-470"><a href="#explode_projection_to_unnest-470"><span class="linenos">470</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">func</span><span class="p">(</span>
|
|
</span><span id="explode_projection_to_unnest-471"><a href="#explode_projection_to_unnest-471"><span class="linenos">471</span></a> <span class="s2">"ARRAY_SIZE"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">func</span><span class="p">(</span><span class="s2">"COALESCE"</span><span class="p">,</span> <span class="n">explode_arg</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Array</span><span class="p">())</span>
|
|
</span><span id="explode_projection_to_unnest-472"><a href="#explode_projection_to_unnest-472"><span class="linenos">472</span></a> <span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="mi">0</span><span class="p">),</span>
|
|
</span><span id="explode_projection_to_unnest-473"><a href="#explode_projection_to_unnest-473"><span class="linenos">473</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">array</span><span class="p">(</span><span class="n">bracket</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span>
|
|
</span><span id="explode_projection_to_unnest-474"><a href="#explode_projection_to_unnest-474"><span class="linenos">474</span></a> <span class="n">explode_arg</span><span class="p">,</span>
|
|
</span><span id="explode_projection_to_unnest-475"><a href="#explode_projection_to_unnest-475"><span class="linenos">475</span></a> <span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-476"><a href="#explode_projection_to_unnest-476"><span class="linenos">476</span></a>
|
|
</span><span id="explode_projection_to_unnest-477"><a href="#explode_projection_to_unnest-477"><span class="linenos">477</span></a> <span class="c1"># This ensures that we won't use [POS]EXPLODE's argument as a new selection</span>
|
|
</span><span id="explode_projection_to_unnest-478"><a href="#explode_projection_to_unnest-478"><span class="linenos">478</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode_arg</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span>
|
|
</span><span id="explode_projection_to_unnest-479"><a href="#explode_projection_to_unnest-479"><span class="linenos">479</span></a> <span class="n">taken_select_names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">output_name</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-480"><a href="#explode_projection_to_unnest-480"><span class="linenos">480</span></a>
|
|
</span><span id="explode_projection_to_unnest-481"><a href="#explode_projection_to_unnest-481"><span class="linenos">481</span></a> <span class="n">unnest_source_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_source_names</span><span class="p">,</span> <span class="s2">"_u"</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-482"><a href="#explode_projection_to_unnest-482"><span class="linenos">482</span></a>
|
|
</span><span id="explode_projection_to_unnest-483"><a href="#explode_projection_to_unnest-483"><span class="linenos">483</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">explode_alias</span><span class="p">:</span>
|
|
</span><span id="explode_projection_to_unnest-484"><a href="#explode_projection_to_unnest-484"><span class="linenos">484</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"col"</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-485"><a href="#explode_projection_to_unnest-485"><span class="linenos">485</span></a>
|
|
</span><span id="explode_projection_to_unnest-486"><a href="#explode_projection_to_unnest-486"><span class="linenos">486</span></a> <span class="k">if</span> <span class="n">is_posexplode</span><span class="p">:</span>
|
|
</span><span id="explode_projection_to_unnest-487"><a href="#explode_projection_to_unnest-487"><span class="linenos">487</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-488"><a href="#explode_projection_to_unnest-488"><span class="linenos">488</span></a>
|
|
</span><span id="explode_projection_to_unnest-489"><a href="#explode_projection_to_unnest-489"><span class="linenos">489</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">pos_alias</span><span class="p">:</span>
|
|
</span><span id="explode_projection_to_unnest-490"><a href="#explode_projection_to_unnest-490"><span class="linenos">490</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-491"><a href="#explode_projection_to_unnest-491"><span class="linenos">491</span></a>
|
|
</span><span id="explode_projection_to_unnest-492"><a href="#explode_projection_to_unnest-492"><span class="linenos">492</span></a> <span class="n">alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">explode_alias</span><span class="p">))</span>
|
|
</span><span id="explode_projection_to_unnest-493"><a href="#explode_projection_to_unnest-493"><span class="linenos">493</span></a>
|
|
</span><span id="explode_projection_to_unnest-494"><a href="#explode_projection_to_unnest-494"><span class="linenos">494</span></a> <span class="n">series_table_alias</span> <span class="o">=</span> <span class="n">series</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="explode_projection_to_unnest-495"><a href="#explode_projection_to_unnest-495"><span class="linenos">495</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">If</span><span class="p">(</span>
|
|
</span><span id="explode_projection_to_unnest-496"><a href="#explode_projection_to_unnest-496"><span class="linenos">496</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">series_table_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span>
|
|
</span><span id="explode_projection_to_unnest-497"><a href="#explode_projection_to_unnest-497"><span class="linenos">497</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">unnest_source_alias</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-498"><a href="#explode_projection_to_unnest-498"><span class="linenos">498</span></a> <span class="p">),</span>
|
|
</span><span id="explode_projection_to_unnest-499"><a href="#explode_projection_to_unnest-499"><span class="linenos">499</span></a> <span class="n">true</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">explode_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">unnest_source_alias</span><span class="p">),</span>
|
|
</span><span id="explode_projection_to_unnest-500"><a href="#explode_projection_to_unnest-500"><span class="linenos">500</span></a> <span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-501"><a href="#explode_projection_to_unnest-501"><span class="linenos">501</span></a>
|
|
</span><span id="explode_projection_to_unnest-502"><a href="#explode_projection_to_unnest-502"><span class="linenos">502</span></a> <span class="n">explode</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-503"><a href="#explode_projection_to_unnest-503"><span class="linenos">503</span></a>
|
|
</span><span id="explode_projection_to_unnest-504"><a href="#explode_projection_to_unnest-504"><span class="linenos">504</span></a> <span class="k">if</span> <span class="n">is_posexplode</span><span class="p">:</span>
|
|
</span><span id="explode_projection_to_unnest-505"><a href="#explode_projection_to_unnest-505"><span class="linenos">505</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span>
|
|
</span><span id="explode_projection_to_unnest-506"><a href="#explode_projection_to_unnest-506"><span class="linenos">506</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span>
|
|
</span><span id="explode_projection_to_unnest-507"><a href="#explode_projection_to_unnest-507"><span class="linenos">507</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span>
|
|
</span><span id="explode_projection_to_unnest-508"><a href="#explode_projection_to_unnest-508"><span class="linenos">508</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">If</span><span class="p">(</span>
|
|
</span><span id="explode_projection_to_unnest-509"><a href="#explode_projection_to_unnest-509"><span class="linenos">509</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">series_table_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span>
|
|
</span><span id="explode_projection_to_unnest-510"><a href="#explode_projection_to_unnest-510"><span class="linenos">510</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">unnest_source_alias</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-511"><a href="#explode_projection_to_unnest-511"><span class="linenos">511</span></a> <span class="p">),</span>
|
|
</span><span id="explode_projection_to_unnest-512"><a href="#explode_projection_to_unnest-512"><span class="linenos">512</span></a> <span class="n">true</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">unnest_source_alias</span><span class="p">),</span>
|
|
</span><span id="explode_projection_to_unnest-513"><a href="#explode_projection_to_unnest-513"><span class="linenos">513</span></a> <span class="p">)</span><span class="o">.</span><span class="n">as_</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span>
|
|
</span><span id="explode_projection_to_unnest-514"><a href="#explode_projection_to_unnest-514"><span class="linenos">514</span></a> <span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-515"><a href="#explode_projection_to_unnest-515"><span class="linenos">515</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">expressions</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-516"><a href="#explode_projection_to_unnest-516"><span class="linenos">516</span></a>
|
|
</span><span id="explode_projection_to_unnest-517"><a href="#explode_projection_to_unnest-517"><span class="linenos">517</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">arrays</span><span class="p">:</span>
|
|
</span><span id="explode_projection_to_unnest-518"><a href="#explode_projection_to_unnest-518"><span class="linenos">518</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">):</span>
|
|
</span><span id="explode_projection_to_unnest-519"><a href="#explode_projection_to_unnest-519"><span class="linenos">519</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">series</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">join_type</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-520"><a href="#explode_projection_to_unnest-520"><span class="linenos">520</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="explode_projection_to_unnest-521"><a href="#explode_projection_to_unnest-521"><span class="linenos">521</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">series</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-522"><a href="#explode_projection_to_unnest-522"><span class="linenos">522</span></a>
|
|
</span><span id="explode_projection_to_unnest-523"><a href="#explode_projection_to_unnest-523"><span class="linenos">523</span></a> <span class="n">size</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Condition</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">ArraySize</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span>
|
|
</span><span id="explode_projection_to_unnest-524"><a href="#explode_projection_to_unnest-524"><span class="linenos">524</span></a> <span class="n">arrays</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">size</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-525"><a href="#explode_projection_to_unnest-525"><span class="linenos">525</span></a>
|
|
</span><span id="explode_projection_to_unnest-526"><a href="#explode_projection_to_unnest-526"><span class="linenos">526</span></a> <span class="c1"># trino doesn't support left join unnest with on conditions</span>
|
|
</span><span id="explode_projection_to_unnest-527"><a href="#explode_projection_to_unnest-527"><span class="linenos">527</span></a> <span class="c1"># if it did, this would be much simpler</span>
|
|
</span><span id="explode_projection_to_unnest-528"><a href="#explode_projection_to_unnest-528"><span class="linenos">528</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">join</span><span class="p">(</span>
|
|
</span><span id="explode_projection_to_unnest-529"><a href="#explode_projection_to_unnest-529"><span class="linenos">529</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span>
|
|
</span><span id="explode_projection_to_unnest-530"><a href="#explode_projection_to_unnest-530"><span class="linenos">530</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span>
|
|
</span><span id="explode_projection_to_unnest-531"><a href="#explode_projection_to_unnest-531"><span class="linenos">531</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">copy</span><span class="p">()],</span>
|
|
</span><span id="explode_projection_to_unnest-532"><a href="#explode_projection_to_unnest-532"><span class="linenos">532</span></a> <span class="n">offset</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span>
|
|
</span><span id="explode_projection_to_unnest-533"><a href="#explode_projection_to_unnest-533"><span class="linenos">533</span></a> <span class="p">),</span>
|
|
</span><span id="explode_projection_to_unnest-534"><a href="#explode_projection_to_unnest-534"><span class="linenos">534</span></a> <span class="n">unnest_source_alias</span><span class="p">,</span>
|
|
</span><span id="explode_projection_to_unnest-535"><a href="#explode_projection_to_unnest-535"><span class="linenos">535</span></a> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">explode_alias</span><span class="p">],</span>
|
|
</span><span id="explode_projection_to_unnest-536"><a href="#explode_projection_to_unnest-536"><span class="linenos">536</span></a> <span class="p">),</span>
|
|
</span><span id="explode_projection_to_unnest-537"><a href="#explode_projection_to_unnest-537"><span class="linenos">537</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">,</span>
|
|
</span><span id="explode_projection_to_unnest-538"><a href="#explode_projection_to_unnest-538"><span class="linenos">538</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
|
|
</span><span id="explode_projection_to_unnest-539"><a href="#explode_projection_to_unnest-539"><span class="linenos">539</span></a> <span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-540"><a href="#explode_projection_to_unnest-540"><span class="linenos">540</span></a>
|
|
</span><span id="explode_projection_to_unnest-541"><a href="#explode_projection_to_unnest-541"><span class="linenos">541</span></a> <span class="k">if</span> <span class="n">index_offset</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span>
|
|
</span><span id="explode_projection_to_unnest-542"><a href="#explode_projection_to_unnest-542"><span class="linenos">542</span></a> <span class="n">size</span> <span class="o">=</span> <span class="n">size</span> <span class="o">-</span> <span class="mi">1</span>
|
|
</span><span id="explode_projection_to_unnest-543"><a href="#explode_projection_to_unnest-543"><span class="linenos">543</span></a>
|
|
</span><span id="explode_projection_to_unnest-544"><a href="#explode_projection_to_unnest-544"><span class="linenos">544</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span>
|
|
</span><span id="explode_projection_to_unnest-545"><a href="#explode_projection_to_unnest-545"><span class="linenos">545</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">series_table_alias</span><span class="p">)</span>
|
|
</span><span id="explode_projection_to_unnest-546"><a href="#explode_projection_to_unnest-546"><span class="linenos">546</span></a> <span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">unnest_source_alias</span><span class="p">))</span>
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</span><span id="explode_projection_to_unnest-547"><a href="#explode_projection_to_unnest-547"><span class="linenos">547</span></a> <span class="o">.</span><span class="n">or_</span><span class="p">(</span>
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</span><span id="explode_projection_to_unnest-548"><a href="#explode_projection_to_unnest-548"><span class="linenos">548</span></a> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">series_table_alias</span><span class="p">)</span> <span class="o">></span> <span class="n">size</span><span class="p">)</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span>
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</span><span id="explode_projection_to_unnest-549"><a href="#explode_projection_to_unnest-549"><span class="linenos">549</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">unnest_source_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">size</span><span class="p">)</span>
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</span><span id="explode_projection_to_unnest-550"><a href="#explode_projection_to_unnest-550"><span class="linenos">550</span></a> <span class="p">)</span>
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</span><span id="explode_projection_to_unnest-551"><a href="#explode_projection_to_unnest-551"><span class="linenos">551</span></a> <span class="p">),</span>
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</span><span id="explode_projection_to_unnest-552"><a href="#explode_projection_to_unnest-552"><span class="linenos">552</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
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</span><span id="explode_projection_to_unnest-553"><a href="#explode_projection_to_unnest-553"><span class="linenos">553</span></a> <span class="p">)</span>
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</span><span id="explode_projection_to_unnest-554"><a href="#explode_projection_to_unnest-554"><span class="linenos">554</span></a>
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</span><span id="explode_projection_to_unnest-555"><a href="#explode_projection_to_unnest-555"><span class="linenos">555</span></a> <span class="k">if</span> <span class="n">arrays</span><span class="p">:</span>
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</span><span id="explode_projection_to_unnest-556"><a href="#explode_projection_to_unnest-556"><span class="linenos">556</span></a> <span class="n">end</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Condition</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Greatest</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">arrays</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">expressions</span><span class="o">=</span><span class="n">arrays</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span>
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</span><span id="explode_projection_to_unnest-557"><a href="#explode_projection_to_unnest-557"><span class="linenos">557</span></a>
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</span><span id="explode_projection_to_unnest-558"><a href="#explode_projection_to_unnest-558"><span class="linenos">558</span></a> <span class="k">if</span> <span class="n">index_offset</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span>
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</span><span id="explode_projection_to_unnest-559"><a href="#explode_projection_to_unnest-559"><span class="linenos">559</span></a> <span class="n">end</span> <span class="o">=</span> <span class="n">end</span> <span class="o">-</span> <span class="p">(</span><span class="mi">1</span> <span class="o">-</span> <span class="n">index_offset</span><span class="p">)</span>
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</span><span id="explode_projection_to_unnest-560"><a href="#explode_projection_to_unnest-560"><span class="linenos">560</span></a> <span class="n">series</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"end"</span><span class="p">,</span> <span class="n">end</span><span class="p">)</span>
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</span><span id="explode_projection_to_unnest-561"><a href="#explode_projection_to_unnest-561"><span class="linenos">561</span></a>
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</span><span id="explode_projection_to_unnest-562"><a href="#explode_projection_to_unnest-562"><span class="linenos">562</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span><span id="explode_projection_to_unnest-563"><a href="#explode_projection_to_unnest-563"><span class="linenos">563</span></a>
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</span><span id="explode_projection_to_unnest-564"><a href="#explode_projection_to_unnest-564"><span class="linenos">564</span></a> <span class="k">return</span> <span class="n">_explode_projection_to_unnest</span>
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</span></pre></div>
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<div class="docstring"><p>Convert explode/posexplode projections into unnests.</p>
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</div>
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</section>
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<section id="add_within_group_for_percentiles">
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<input id="add_within_group_for_percentiles-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">add_within_group_for_percentiles</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="add_within_group_for_percentiles-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#add_within_group_for_percentiles"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="add_within_group_for_percentiles-567"><a href="#add_within_group_for_percentiles-567"><span class="linenos">567</span></a><span class="k">def</span><span class="w"> </span><span class="nf">add_within_group_for_percentiles</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="add_within_group_for_percentiles-568"><a href="#add_within_group_for_percentiles-568"><span class="linenos">568</span></a><span class="w"> </span><span class="sd">"""Transforms percentiles by adding a WITHIN GROUP clause to them."""</span>
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</span><span id="add_within_group_for_percentiles-569"><a href="#add_within_group_for_percentiles-569"><span class="linenos">569</span></a> <span class="k">if</span> <span class="p">(</span>
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</span><span id="add_within_group_for_percentiles-570"><a href="#add_within_group_for_percentiles-570"><span class="linenos">570</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">PERCENTILES</span><span class="p">)</span>
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</span><span id="add_within_group_for_percentiles-571"><a href="#add_within_group_for_percentiles-571"><span class="linenos">571</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">)</span>
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</span><span id="add_within_group_for_percentiles-572"><a href="#add_within_group_for_percentiles-572"><span class="linenos">572</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span>
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</span><span id="add_within_group_for_percentiles-573"><a href="#add_within_group_for_percentiles-573"><span class="linenos">573</span></a> <span class="p">):</span>
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</span><span id="add_within_group_for_percentiles-574"><a href="#add_within_group_for_percentiles-574"><span class="linenos">574</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
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</span><span id="add_within_group_for_percentiles-575"><a href="#add_within_group_for_percentiles-575"><span class="linenos">575</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">pop</span><span class="p">())</span>
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</span><span id="add_within_group_for_percentiles-576"><a href="#add_within_group_for_percentiles-576"><span class="linenos">576</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">column</span><span class="p">)])</span>
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</span><span id="add_within_group_for_percentiles-577"><a href="#add_within_group_for_percentiles-577"><span class="linenos">577</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">order</span><span class="p">)</span>
|
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</span><span id="add_within_group_for_percentiles-578"><a href="#add_within_group_for_percentiles-578"><span class="linenos">578</span></a>
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|
</span><span id="add_within_group_for_percentiles-579"><a href="#add_within_group_for_percentiles-579"><span class="linenos">579</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span></pre></div>
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<div class="docstring"><p>Transforms percentiles by adding a WITHIN GROUP clause to them.</p>
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</div>
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</section>
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<section id="remove_within_group_for_percentiles">
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<input id="remove_within_group_for_percentiles-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">remove_within_group_for_percentiles</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="remove_within_group_for_percentiles-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#remove_within_group_for_percentiles"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="remove_within_group_for_percentiles-582"><a href="#remove_within_group_for_percentiles-582"><span class="linenos">582</span></a><span class="k">def</span><span class="w"> </span><span class="nf">remove_within_group_for_percentiles</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="remove_within_group_for_percentiles-583"><a href="#remove_within_group_for_percentiles-583"><span class="linenos">583</span></a><span class="w"> </span><span class="sd">"""Transforms percentiles by getting rid of their corresponding WITHIN GROUP clause."""</span>
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</span><span id="remove_within_group_for_percentiles-584"><a href="#remove_within_group_for_percentiles-584"><span class="linenos">584</span></a> <span class="k">if</span> <span class="p">(</span>
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</span><span id="remove_within_group_for_percentiles-585"><a href="#remove_within_group_for_percentiles-585"><span class="linenos">585</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">)</span>
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</span><span id="remove_within_group_for_percentiles-586"><a href="#remove_within_group_for_percentiles-586"><span class="linenos">586</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">PERCENTILES</span><span class="p">)</span>
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</span><span id="remove_within_group_for_percentiles-587"><a href="#remove_within_group_for_percentiles-587"><span class="linenos">587</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">)</span>
|
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</span><span id="remove_within_group_for_percentiles-588"><a href="#remove_within_group_for_percentiles-588"><span class="linenos">588</span></a> <span class="p">):</span>
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</span><span id="remove_within_group_for_percentiles-589"><a href="#remove_within_group_for_percentiles-589"><span class="linenos">589</span></a> <span class="n">quantile</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">this</span>
|
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</span><span id="remove_within_group_for_percentiles-590"><a href="#remove_within_group_for_percentiles-590"><span class="linenos">590</span></a> <span class="n">input_value</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">))</span><span class="o">.</span><span class="n">this</span>
|
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</span><span id="remove_within_group_for_percentiles-591"><a href="#remove_within_group_for_percentiles-591"><span class="linenos">591</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">ApproxQuantile</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">input_value</span><span class="p">,</span> <span class="n">quantile</span><span class="o">=</span><span class="n">quantile</span><span class="p">))</span>
|
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</span><span id="remove_within_group_for_percentiles-592"><a href="#remove_within_group_for_percentiles-592"><span class="linenos">592</span></a>
|
|
</span><span id="remove_within_group_for_percentiles-593"><a href="#remove_within_group_for_percentiles-593"><span class="linenos">593</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span></pre></div>
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<div class="docstring"><p>Transforms percentiles by getting rid of their corresponding WITHIN GROUP clause.</p>
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</div>
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</section>
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<section id="add_recursive_cte_column_names">
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<input id="add_recursive_cte_column_names-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">add_recursive_cte_column_names</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="add_recursive_cte_column_names-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#add_recursive_cte_column_names"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="add_recursive_cte_column_names-596"><a href="#add_recursive_cte_column_names-596"><span class="linenos">596</span></a><span class="k">def</span><span class="w"> </span><span class="nf">add_recursive_cte_column_names</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="add_recursive_cte_column_names-597"><a href="#add_recursive_cte_column_names-597"><span class="linenos">597</span></a><span class="w"> </span><span class="sd">"""Uses projection output names in recursive CTE definitions to define the CTEs' columns."""</span>
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</span><span id="add_recursive_cte_column_names-598"><a href="#add_recursive_cte_column_names-598"><span class="linenos">598</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span>
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</span><span id="add_recursive_cte_column_names-599"><a href="#add_recursive_cte_column_names-599"><span class="linenos">599</span></a> <span class="n">next_name</span> <span class="o">=</span> <span class="n">name_sequence</span><span class="p">(</span><span class="s2">"_c_"</span><span class="p">)</span>
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</span><span id="add_recursive_cte_column_names-600"><a href="#add_recursive_cte_column_names-600"><span class="linenos">600</span></a>
|
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</span><span id="add_recursive_cte_column_names-601"><a href="#add_recursive_cte_column_names-601"><span class="linenos">601</span></a> <span class="k">for</span> <span class="n">cte</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span>
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</span><span id="add_recursive_cte_column_names-602"><a href="#add_recursive_cte_column_names-602"><span class="linenos">602</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">cte</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span>
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</span><span id="add_recursive_cte_column_names-603"><a href="#add_recursive_cte_column_names-603"><span class="linenos">603</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">this</span>
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</span><span id="add_recursive_cte_column_names-604"><a href="#add_recursive_cte_column_names-604"><span class="linenos">604</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">SetOperation</span><span class="p">):</span>
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</span><span id="add_recursive_cte_column_names-605"><a href="#add_recursive_cte_column_names-605"><span class="linenos">605</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">this</span>
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</span><span id="add_recursive_cte_column_names-606"><a href="#add_recursive_cte_column_names-606"><span class="linenos">606</span></a>
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</span><span id="add_recursive_cte_column_names-607"><a href="#add_recursive_cte_column_names-607"><span class="linenos">607</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span>
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</span><span id="add_recursive_cte_column_names-608"><a href="#add_recursive_cte_column_names-608"><span class="linenos">608</span></a> <span class="s2">"columns"</span><span class="p">,</span>
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</span><span id="add_recursive_cte_column_names-609"><a href="#add_recursive_cte_column_names-609"><span class="linenos">609</span></a> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">or</span> <span class="n">next_name</span><span class="p">())</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">query</span><span class="o">.</span><span class="n">selects</span><span class="p">],</span>
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</span><span id="add_recursive_cte_column_names-610"><a href="#add_recursive_cte_column_names-610"><span class="linenos">610</span></a> <span class="p">)</span>
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</span><span id="add_recursive_cte_column_names-611"><a href="#add_recursive_cte_column_names-611"><span class="linenos">611</span></a>
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</span><span id="add_recursive_cte_column_names-612"><a href="#add_recursive_cte_column_names-612"><span class="linenos">612</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span></pre></div>
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<div class="docstring"><p>Uses projection output names in recursive CTE definitions to define the CTEs' columns.</p>
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</div>
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</section>
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<section id="epoch_cast_to_ts">
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<input id="epoch_cast_to_ts-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">epoch_cast_to_ts</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="epoch_cast_to_ts-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#epoch_cast_to_ts"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="epoch_cast_to_ts-615"><a href="#epoch_cast_to_ts-615"><span class="linenos">615</span></a><span class="k">def</span><span class="w"> </span><span class="nf">epoch_cast_to_ts</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="epoch_cast_to_ts-616"><a href="#epoch_cast_to_ts-616"><span class="linenos">616</span></a><span class="w"> </span><span class="sd">"""Replace 'epoch' in casts by the equivalent date literal."""</span>
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</span><span id="epoch_cast_to_ts-617"><a href="#epoch_cast_to_ts-617"><span class="linenos">617</span></a> <span class="k">if</span> <span class="p">(</span>
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</span><span id="epoch_cast_to_ts-618"><a href="#epoch_cast_to_ts-618"><span class="linenos">618</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TryCast</span><span class="p">))</span>
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</span><span id="epoch_cast_to_ts-619"><a href="#epoch_cast_to_ts-619"><span class="linenos">619</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">name</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s2">"epoch"</span>
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</span><span id="epoch_cast_to_ts-620"><a href="#epoch_cast_to_ts-620"><span class="linenos">620</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEMPORAL_TYPES</span>
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</span><span id="epoch_cast_to_ts-621"><a href="#epoch_cast_to_ts-621"><span class="linenos">621</span></a> <span class="p">):</span>
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</span><span id="epoch_cast_to_ts-622"><a href="#epoch_cast_to_ts-622"><span class="linenos">622</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">string</span><span class="p">(</span><span class="s2">"1970-01-01 00:00:00"</span><span class="p">))</span>
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</span><span id="epoch_cast_to_ts-623"><a href="#epoch_cast_to_ts-623"><span class="linenos">623</span></a>
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</span><span id="epoch_cast_to_ts-624"><a href="#epoch_cast_to_ts-624"><span class="linenos">624</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span></pre></div>
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<div class="docstring"><p>Replace 'epoch' in casts by the equivalent date literal.</p>
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</div>
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</section>
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<section id="eliminate_semi_and_anti_joins">
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<input id="eliminate_semi_and_anti_joins-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">eliminate_semi_and_anti_joins</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="eliminate_semi_and_anti_joins-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#eliminate_semi_and_anti_joins"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="eliminate_semi_and_anti_joins-627"><a href="#eliminate_semi_and_anti_joins-627"><span class="linenos">627</span></a><span class="k">def</span><span class="w"> </span><span class="nf">eliminate_semi_and_anti_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="eliminate_semi_and_anti_joins-628"><a href="#eliminate_semi_and_anti_joins-628"><span class="linenos">628</span></a><span class="w"> </span><span class="sd">"""Convert SEMI and ANTI joins into equivalent forms that use EXIST instead."""</span>
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</span><span id="eliminate_semi_and_anti_joins-629"><a href="#eliminate_semi_and_anti_joins-629"><span class="linenos">629</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
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</span><span id="eliminate_semi_and_anti_joins-630"><a href="#eliminate_semi_and_anti_joins-630"><span class="linenos">630</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span>
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</span><span id="eliminate_semi_and_anti_joins-631"><a href="#eliminate_semi_and_anti_joins-631"><span class="linenos">631</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span>
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</span><span id="eliminate_semi_and_anti_joins-632"><a href="#eliminate_semi_and_anti_joins-632"><span class="linenos">632</span></a> <span class="k">if</span> <span class="n">on</span> <span class="ow">and</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="ow">in</span> <span class="p">(</span><span class="s2">"SEMI"</span><span class="p">,</span> <span class="s2">"ANTI"</span><span class="p">):</span>
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</span><span id="eliminate_semi_and_anti_joins-633"><a href="#eliminate_semi_and_anti_joins-633"><span class="linenos">633</span></a> <span class="n">subquery</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">"1"</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="p">)</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">on</span><span class="p">)</span>
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</span><span id="eliminate_semi_and_anti_joins-634"><a href="#eliminate_semi_and_anti_joins-634"><span class="linenos">634</span></a> <span class="n">exists</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">subquery</span><span class="p">)</span>
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</span><span id="eliminate_semi_and_anti_joins-635"><a href="#eliminate_semi_and_anti_joins-635"><span class="linenos">635</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="o">==</span> <span class="s2">"ANTI"</span><span class="p">:</span>
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</span><span id="eliminate_semi_and_anti_joins-636"><a href="#eliminate_semi_and_anti_joins-636"><span class="linenos">636</span></a> <span class="n">exists</span> <span class="o">=</span> <span class="n">exists</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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</span><span id="eliminate_semi_and_anti_joins-637"><a href="#eliminate_semi_and_anti_joins-637"><span class="linenos">637</span></a>
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</span><span id="eliminate_semi_and_anti_joins-638"><a href="#eliminate_semi_and_anti_joins-638"><span class="linenos">638</span></a> <span class="n">join</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
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</span><span id="eliminate_semi_and_anti_joins-639"><a href="#eliminate_semi_and_anti_joins-639"><span class="linenos">639</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exists</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
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</span><span id="eliminate_semi_and_anti_joins-640"><a href="#eliminate_semi_and_anti_joins-640"><span class="linenos">640</span></a>
|
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</span><span id="eliminate_semi_and_anti_joins-641"><a href="#eliminate_semi_and_anti_joins-641"><span class="linenos">641</span></a> <span class="k">return</span> <span class="n">expression</span>
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|
</span></pre></div>
|
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<div class="docstring"><p>Convert SEMI and ANTI joins into equivalent forms that use EXIST instead.</p>
|
|
</div>
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</section>
|
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<section id="eliminate_full_outer_join">
|
|
<input id="eliminate_full_outer_join-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">eliminate_full_outer_join</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="eliminate_full_outer_join-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#eliminate_full_outer_join"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="eliminate_full_outer_join-644"><a href="#eliminate_full_outer_join-644"><span class="linenos">644</span></a><span class="k">def</span><span class="w"> </span><span class="nf">eliminate_full_outer_join</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="eliminate_full_outer_join-645"><a href="#eliminate_full_outer_join-645"><span class="linenos">645</span></a><span class="w"> </span><span class="sd">"""</span>
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</span><span id="eliminate_full_outer_join-646"><a href="#eliminate_full_outer_join-646"><span class="linenos">646</span></a><span class="sd"> Converts a query with a FULL OUTER join to a union of identical queries that</span>
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|
</span><span id="eliminate_full_outer_join-647"><a href="#eliminate_full_outer_join-647"><span class="linenos">647</span></a><span class="sd"> use LEFT/RIGHT OUTER joins instead. This transformation currently only works</span>
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|
</span><span id="eliminate_full_outer_join-648"><a href="#eliminate_full_outer_join-648"><span class="linenos">648</span></a><span class="sd"> for queries that have a single FULL OUTER join.</span>
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</span><span id="eliminate_full_outer_join-649"><a href="#eliminate_full_outer_join-649"><span class="linenos">649</span></a><span class="sd"> """</span>
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</span><span id="eliminate_full_outer_join-650"><a href="#eliminate_full_outer_join-650"><span class="linenos">650</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
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</span><span id="eliminate_full_outer_join-651"><a href="#eliminate_full_outer_join-651"><span class="linenos">651</span></a> <span class="n">full_outer_joins</span> <span class="o">=</span> <span class="p">[</span>
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</span><span id="eliminate_full_outer_join-652"><a href="#eliminate_full_outer_join-652"><span class="linenos">652</span></a> <span class="p">(</span><span class="n">index</span><span class="p">,</span> <span class="n">join</span><span class="p">)</span>
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</span><span id="eliminate_full_outer_join-653"><a href="#eliminate_full_outer_join-653"><span class="linenos">653</span></a> <span class="k">for</span> <span class="n">index</span><span class="p">,</span> <span class="n">join</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[])</span>
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</span><span id="eliminate_full_outer_join-654"><a href="#eliminate_full_outer_join-654"><span class="linenos">654</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">side</span> <span class="o">==</span> <span class="s2">"FULL"</span>
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</span><span id="eliminate_full_outer_join-655"><a href="#eliminate_full_outer_join-655"><span class="linenos">655</span></a> <span class="p">]</span>
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</span><span id="eliminate_full_outer_join-656"><a href="#eliminate_full_outer_join-656"><span class="linenos">656</span></a>
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</span><span id="eliminate_full_outer_join-657"><a href="#eliminate_full_outer_join-657"><span class="linenos">657</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">full_outer_joins</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
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</span><span id="eliminate_full_outer_join-658"><a href="#eliminate_full_outer_join-658"><span class="linenos">658</span></a> <span class="n">expression_copy</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
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</span><span id="eliminate_full_outer_join-659"><a href="#eliminate_full_outer_join-659"><span class="linenos">659</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"limit"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
|
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</span><span id="eliminate_full_outer_join-660"><a href="#eliminate_full_outer_join-660"><span class="linenos">660</span></a> <span class="n">index</span><span class="p">,</span> <span class="n">full_outer_join</span> <span class="o">=</span> <span class="n">full_outer_joins</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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</span><span id="eliminate_full_outer_join-661"><a href="#eliminate_full_outer_join-661"><span class="linenos">661</span></a>
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</span><span id="eliminate_full_outer_join-662"><a href="#eliminate_full_outer_join-662"><span class="linenos">662</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"from"</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">full_outer_join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">)</span>
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</span><span id="eliminate_full_outer_join-663"><a href="#eliminate_full_outer_join-663"><span class="linenos">663</span></a> <span class="n">join_conditions</span> <span class="o">=</span> <span class="n">full_outer_join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span>
|
|
</span><span id="eliminate_full_outer_join-664"><a href="#eliminate_full_outer_join-664"><span class="linenos">664</span></a> <span class="o">*</span><span class="p">[</span>
|
|
</span><span id="eliminate_full_outer_join-665"><a href="#eliminate_full_outer_join-665"><span class="linenos">665</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">col</span><span class="p">,</span> <span class="n">tables</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">col</span><span class="p">,</span> <span class="n">tables</span><span class="p">[</span><span class="mi">1</span><span class="p">]))</span>
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</span><span id="eliminate_full_outer_join-666"><a href="#eliminate_full_outer_join-666"><span class="linenos">666</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">full_outer_join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"using"</span><span class="p">)</span>
|
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</span><span id="eliminate_full_outer_join-667"><a href="#eliminate_full_outer_join-667"><span class="linenos">667</span></a> <span class="p">]</span>
|
|
</span><span id="eliminate_full_outer_join-668"><a href="#eliminate_full_outer_join-668"><span class="linenos">668</span></a> <span class="p">)</span>
|
|
</span><span id="eliminate_full_outer_join-669"><a href="#eliminate_full_outer_join-669"><span class="linenos">669</span></a>
|
|
</span><span id="eliminate_full_outer_join-670"><a href="#eliminate_full_outer_join-670"><span class="linenos">670</span></a> <span class="n">full_outer_join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"side"</span><span class="p">,</span> <span class="s2">"left"</span><span class="p">)</span>
|
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</span><span id="eliminate_full_outer_join-671"><a href="#eliminate_full_outer_join-671"><span class="linenos">671</span></a> <span class="n">anti_join_clause</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">"1"</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"from"</span><span class="p">])</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">join_conditions</span><span class="p">)</span>
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</span><span id="eliminate_full_outer_join-672"><a href="#eliminate_full_outer_join-672"><span class="linenos">672</span></a> <span class="n">expression_copy</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"joins"</span><span class="p">][</span><span class="n">index</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"side"</span><span class="p">,</span> <span class="s2">"right"</span><span class="p">)</span>
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</span><span id="eliminate_full_outer_join-673"><a href="#eliminate_full_outer_join-673"><span class="linenos">673</span></a> <span class="n">expression_copy</span> <span class="o">=</span> <span class="n">expression_copy</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">anti_join_clause</span><span class="p">)</span><span class="o">.</span><span class="n">not_</span><span class="p">())</span>
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</span><span id="eliminate_full_outer_join-674"><a href="#eliminate_full_outer_join-674"><span class="linenos">674</span></a> <span class="n">expression_copy</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> <span class="c1"># remove CTEs from RIGHT side</span>
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|
</span><span id="eliminate_full_outer_join-675"><a href="#eliminate_full_outer_join-675"><span class="linenos">675</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> <span class="c1"># remove order by from LEFT side</span>
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</span><span id="eliminate_full_outer_join-676"><a href="#eliminate_full_outer_join-676"><span class="linenos">676</span></a>
|
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</span><span id="eliminate_full_outer_join-677"><a href="#eliminate_full_outer_join-677"><span class="linenos">677</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">union</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression_copy</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">distinct</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
|
</span><span id="eliminate_full_outer_join-678"><a href="#eliminate_full_outer_join-678"><span class="linenos">678</span></a>
|
|
</span><span id="eliminate_full_outer_join-679"><a href="#eliminate_full_outer_join-679"><span class="linenos">679</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Converts a query with a FULL OUTER join to a union of identical queries that
|
|
use LEFT/RIGHT OUTER joins instead. This transformation currently only works
|
|
for queries that have a single FULL OUTER join.</p>
|
|
</div>
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</section>
|
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<section id="move_ctes_to_top_level">
|
|
<input id="move_ctes_to_top_level-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
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<div class="attr function">
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|
|
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<span class="def">def</span>
|
|
<span class="name">move_ctes_to_top_level</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">expression</span><span class="p">:</span> <span class="o">~</span><span class="n">E</span></span><span class="return-annotation">) -> <span class="o">~</span><span class="n">E</span>:</span></span>
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<label class="view-source-button" for="move_ctes_to_top_level-view-source"><span>View Source</span></label>
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</div>
|
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<a class="headerlink" href="#move_ctes_to_top_level"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="move_ctes_to_top_level-682"><a href="#move_ctes_to_top_level-682"><span class="linenos">682</span></a><span class="k">def</span><span class="w"> </span><span class="nf">move_ctes_to_top_level</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">E</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
|
|
</span><span id="move_ctes_to_top_level-683"><a href="#move_ctes_to_top_level-683"><span class="linenos">683</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="move_ctes_to_top_level-684"><a href="#move_ctes_to_top_level-684"><span class="linenos">684</span></a><span class="sd"> Some dialects (e.g. Hive, T-SQL, Spark prior to version 3) only allow CTEs to be</span>
|
|
</span><span id="move_ctes_to_top_level-685"><a href="#move_ctes_to_top_level-685"><span class="linenos">685</span></a><span class="sd"> defined at the top-level, so for example queries like:</span>
|
|
</span><span id="move_ctes_to_top_level-686"><a href="#move_ctes_to_top_level-686"><span class="linenos">686</span></a>
|
|
</span><span id="move_ctes_to_top_level-687"><a href="#move_ctes_to_top_level-687"><span class="linenos">687</span></a><span class="sd"> SELECT * FROM (WITH t(c) AS (SELECT 1) SELECT * FROM t) AS subq</span>
|
|
</span><span id="move_ctes_to_top_level-688"><a href="#move_ctes_to_top_level-688"><span class="linenos">688</span></a>
|
|
</span><span id="move_ctes_to_top_level-689"><a href="#move_ctes_to_top_level-689"><span class="linenos">689</span></a><span class="sd"> are invalid in those dialects. This transformation can be used to ensure all CTEs are</span>
|
|
</span><span id="move_ctes_to_top_level-690"><a href="#move_ctes_to_top_level-690"><span class="linenos">690</span></a><span class="sd"> moved to the top level so that the final SQL code is valid from a syntax standpoint.</span>
|
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</span><span id="move_ctes_to_top_level-691"><a href="#move_ctes_to_top_level-691"><span class="linenos">691</span></a>
|
|
</span><span id="move_ctes_to_top_level-692"><a href="#move_ctes_to_top_level-692"><span class="linenos">692</span></a><span class="sd"> TODO: handle name clashes whilst moving CTEs (it can get quite tricky & costly).</span>
|
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</span><span id="move_ctes_to_top_level-693"><a href="#move_ctes_to_top_level-693"><span class="linenos">693</span></a><span class="sd"> """</span>
|
|
</span><span id="move_ctes_to_top_level-694"><a href="#move_ctes_to_top_level-694"><span class="linenos">694</span></a> <span class="n">top_level_with</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span>
|
|
</span><span id="move_ctes_to_top_level-695"><a href="#move_ctes_to_top_level-695"><span class="linenos">695</span></a> <span class="k">for</span> <span class="n">inner_with</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">):</span>
|
|
</span><span id="move_ctes_to_top_level-696"><a href="#move_ctes_to_top_level-696"><span class="linenos">696</span></a> <span class="k">if</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">parent</span> <span class="ow">is</span> <span class="n">expression</span><span class="p">:</span>
|
|
</span><span id="move_ctes_to_top_level-697"><a href="#move_ctes_to_top_level-697"><span class="linenos">697</span></a> <span class="k">continue</span>
|
|
</span><span id="move_ctes_to_top_level-698"><a href="#move_ctes_to_top_level-698"><span class="linenos">698</span></a>
|
|
</span><span id="move_ctes_to_top_level-699"><a href="#move_ctes_to_top_level-699"><span class="linenos">699</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">top_level_with</span><span class="p">:</span>
|
|
</span><span id="move_ctes_to_top_level-700"><a href="#move_ctes_to_top_level-700"><span class="linenos">700</span></a> <span class="n">top_level_with</span> <span class="o">=</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
|
|
</span><span id="move_ctes_to_top_level-701"><a href="#move_ctes_to_top_level-701"><span class="linenos">701</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">top_level_with</span><span class="p">)</span>
|
|
</span><span id="move_ctes_to_top_level-702"><a href="#move_ctes_to_top_level-702"><span class="linenos">702</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="move_ctes_to_top_level-703"><a href="#move_ctes_to_top_level-703"><span class="linenos">703</span></a> <span class="k">if</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span>
|
|
</span><span id="move_ctes_to_top_level-704"><a href="#move_ctes_to_top_level-704"><span class="linenos">704</span></a> <span class="n">top_level_with</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"recursive"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
|
|
</span><span id="move_ctes_to_top_level-705"><a href="#move_ctes_to_top_level-705"><span class="linenos">705</span></a>
|
|
</span><span id="move_ctes_to_top_level-706"><a href="#move_ctes_to_top_level-706"><span class="linenos">706</span></a> <span class="n">parent_cte</span> <span class="o">=</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">)</span>
|
|
</span><span id="move_ctes_to_top_level-707"><a href="#move_ctes_to_top_level-707"><span class="linenos">707</span></a> <span class="n">inner_with</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
|
|
</span><span id="move_ctes_to_top_level-708"><a href="#move_ctes_to_top_level-708"><span class="linenos">708</span></a>
|
|
</span><span id="move_ctes_to_top_level-709"><a href="#move_ctes_to_top_level-709"><span class="linenos">709</span></a> <span class="k">if</span> <span class="n">parent_cte</span><span class="p">:</span>
|
|
</span><span id="move_ctes_to_top_level-710"><a href="#move_ctes_to_top_level-710"><span class="linenos">710</span></a> <span class="n">i</span> <span class="o">=</span> <span class="n">top_level_with</span><span class="o">.</span><span class="n">expressions</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">parent_cte</span><span class="p">)</span>
|
|
</span><span id="move_ctes_to_top_level-711"><a href="#move_ctes_to_top_level-711"><span class="linenos">711</span></a> <span class="n">top_level_with</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="n">i</span><span class="p">:</span><span class="n">i</span><span class="p">]</span> <span class="o">=</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">expressions</span>
|
|
</span><span id="move_ctes_to_top_level-712"><a href="#move_ctes_to_top_level-712"><span class="linenos">712</span></a> <span class="n">top_level_with</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">top_level_with</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span>
|
|
</span><span id="move_ctes_to_top_level-713"><a href="#move_ctes_to_top_level-713"><span class="linenos">713</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="move_ctes_to_top_level-714"><a href="#move_ctes_to_top_level-714"><span class="linenos">714</span></a> <span class="n">top_level_with</span><span class="o">.</span><span class="n">set</span><span class="p">(</span>
|
|
</span><span id="move_ctes_to_top_level-715"><a href="#move_ctes_to_top_level-715"><span class="linenos">715</span></a> <span class="s2">"expressions"</span><span class="p">,</span> <span class="n">top_level_with</span><span class="o">.</span><span class="n">expressions</span> <span class="o">+</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">expressions</span>
|
|
</span><span id="move_ctes_to_top_level-716"><a href="#move_ctes_to_top_level-716"><span class="linenos">716</span></a> <span class="p">)</span>
|
|
</span><span id="move_ctes_to_top_level-717"><a href="#move_ctes_to_top_level-717"><span class="linenos">717</span></a>
|
|
</span><span id="move_ctes_to_top_level-718"><a href="#move_ctes_to_top_level-718"><span class="linenos">718</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Some dialects (e.g. Hive, T-SQL, Spark prior to version 3) only allow CTEs to be
|
|
defined at the top-level, so for example queries like:</p>
|
|
|
|
<pre><code>SELECT * FROM (WITH t(c) AS (SELECT 1) SELECT * FROM t) AS subq
|
|
</code></pre>
|
|
|
|
<p>are invalid in those dialects. This transformation can be used to ensure all CTEs are
|
|
moved to the top level so that the final SQL code is valid from a syntax standpoint.</p>
|
|
|
|
<p>TODO: handle name clashes whilst moving CTEs (it can get quite tricky & costly).</p>
|
|
</div>
|
|
|
|
|
|
</section>
|
|
<section id="ensure_bools">
|
|
<input id="ensure_bools-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
|
<div class="attr function">
|
|
|
|
<span class="def">def</span>
|
|
<span class="name">ensure_bools</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
|
|
|
|
<label class="view-source-button" for="ensure_bools-view-source"><span>View Source</span></label>
|
|
|
|
</div>
|
|
<a class="headerlink" href="#ensure_bools"></a>
|
|
<div class="pdoc-code codehilite"><pre><span></span><span id="ensure_bools-721"><a href="#ensure_bools-721"><span class="linenos">721</span></a><span class="k">def</span><span class="w"> </span><span class="nf">ensure_bools</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="ensure_bools-722"><a href="#ensure_bools-722"><span class="linenos">722</span></a><span class="w"> </span><span class="sd">"""Converts numeric values used in conditions into explicit boolean expressions."""</span>
|
|
</span><span id="ensure_bools-723"><a href="#ensure_bools-723"><span class="linenos">723</span></a> <span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.optimizer.canonicalize</span><span class="w"> </span><span class="kn">import</span> <span class="n">ensure_bools</span>
|
|
</span><span id="ensure_bools-724"><a href="#ensure_bools-724"><span class="linenos">724</span></a>
|
|
</span><span id="ensure_bools-725"><a href="#ensure_bools-725"><span class="linenos">725</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_ensure_bool</span><span class="p">(</span><span class="n">node</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="ensure_bools-726"><a href="#ensure_bools-726"><span class="linenos">726</span></a> <span class="k">if</span> <span class="p">(</span>
|
|
</span><span id="ensure_bools-727"><a href="#ensure_bools-727"><span class="linenos">727</span></a> <span class="n">node</span><span class="o">.</span><span class="n">is_number</span>
|
|
</span><span id="ensure_bools-728"><a href="#ensure_bools-728"><span class="linenos">728</span></a> <span class="ow">or</span> <span class="p">(</span>
|
|
</span><span id="ensure_bools-729"><a href="#ensure_bools-729"><span class="linenos">729</span></a> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">SubqueryPredicate</span><span class="p">)</span>
|
|
</span><span id="ensure_bools-730"><a href="#ensure_bools-730"><span class="linenos">730</span></a> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">is_type</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">UNKNOWN</span><span class="p">,</span> <span class="o">*</span><span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">NUMERIC_TYPES</span><span class="p">)</span>
|
|
</span><span id="ensure_bools-731"><a href="#ensure_bools-731"><span class="linenos">731</span></a> <span class="p">)</span>
|
|
</span><span id="ensure_bools-732"><a href="#ensure_bools-732"><span class="linenos">732</span></a> <span class="ow">or</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">node</span><span class="o">.</span><span class="n">type</span><span class="p">)</span>
|
|
</span><span id="ensure_bools-733"><a href="#ensure_bools-733"><span class="linenos">733</span></a> <span class="p">):</span>
|
|
</span><span id="ensure_bools-734"><a href="#ensure_bools-734"><span class="linenos">734</span></a> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">neq</span><span class="p">(</span><span class="mi">0</span><span class="p">))</span>
|
|
</span><span id="ensure_bools-735"><a href="#ensure_bools-735"><span class="linenos">735</span></a>
|
|
</span><span id="ensure_bools-736"><a href="#ensure_bools-736"><span class="linenos">736</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">walk</span><span class="p">():</span>
|
|
</span><span id="ensure_bools-737"><a href="#ensure_bools-737"><span class="linenos">737</span></a> <span class="n">ensure_bools</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">_ensure_bool</span><span class="p">)</span>
|
|
</span><span id="ensure_bools-738"><a href="#ensure_bools-738"><span class="linenos">738</span></a>
|
|
</span><span id="ensure_bools-739"><a href="#ensure_bools-739"><span class="linenos">739</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
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<div class="docstring"><p>Converts numeric values used in conditions into explicit boolean expressions.</p>
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</div>
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</section>
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<section id="unqualify_columns">
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<input id="unqualify_columns-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">unqualify_columns</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="unqualify_columns-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#unqualify_columns"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="unqualify_columns-742"><a href="#unqualify_columns-742"><span class="linenos">742</span></a><span class="k">def</span><span class="w"> </span><span class="nf">unqualify_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="unqualify_columns-743"><a href="#unqualify_columns-743"><span class="linenos">743</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span>
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</span><span id="unqualify_columns-744"><a href="#unqualify_columns-744"><span class="linenos">744</span></a> <span class="c1"># We only wanna pop off the table, db, catalog args</span>
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</span><span id="unqualify_columns-745"><a href="#unqualify_columns-745"><span class="linenos">745</span></a> <span class="k">for</span> <span class="n">part</span> <span class="ow">in</span> <span class="n">column</span><span class="o">.</span><span class="n">parts</span><span class="p">[:</span><span class="o">-</span><span class="mi">1</span><span class="p">]:</span>
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</span><span id="unqualify_columns-746"><a href="#unqualify_columns-746"><span class="linenos">746</span></a> <span class="n">part</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
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</span><span id="unqualify_columns-747"><a href="#unqualify_columns-747"><span class="linenos">747</span></a>
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</span><span id="unqualify_columns-748"><a href="#unqualify_columns-748"><span class="linenos">748</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span></pre></div>
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</section>
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<section id="remove_unique_constraints">
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<input id="remove_unique_constraints-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">remove_unique_constraints</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="remove_unique_constraints-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#remove_unique_constraints"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="remove_unique_constraints-751"><a href="#remove_unique_constraints-751"><span class="linenos">751</span></a><span class="k">def</span><span class="w"> </span><span class="nf">remove_unique_constraints</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="remove_unique_constraints-752"><a href="#remove_unique_constraints-752"><span class="linenos">752</span></a> <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Create</span><span class="p">)</span>
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</span><span id="remove_unique_constraints-753"><a href="#remove_unique_constraints-753"><span class="linenos">753</span></a> <span class="k">for</span> <span class="n">constraint</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">UniqueColumnConstraint</span><span class="p">):</span>
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</span><span id="remove_unique_constraints-754"><a href="#remove_unique_constraints-754"><span class="linenos">754</span></a> <span class="k">if</span> <span class="n">constraint</span><span class="o">.</span><span class="n">parent</span><span class="p">:</span>
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</span><span id="remove_unique_constraints-755"><a href="#remove_unique_constraints-755"><span class="linenos">755</span></a> <span class="n">constraint</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
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</span><span id="remove_unique_constraints-756"><a href="#remove_unique_constraints-756"><span class="linenos">756</span></a>
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</span><span id="remove_unique_constraints-757"><a href="#remove_unique_constraints-757"><span class="linenos">757</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span></pre></div>
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</section>
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<section id="ctas_with_tmp_tables_to_create_tmp_view">
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<input id="ctas_with_tmp_tables_to_create_tmp_view-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">ctas_with_tmp_tables_to_create_tmp_view</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>,</span><span class="param"> <span class="n">tmp_storage_provider</span><span class="p">:</span> <span class="n">Callable</span><span class="p">[[</span><span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span><span class="p">],</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span><span class="p">]</span> <span class="o">=</span> <span class="o"><</span><span class="n">function</span> <span class="o"><</span><span class="k">lambda</span><span class="o">>></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="ctas_with_tmp_tables_to_create_tmp_view-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#ctas_with_tmp_tables_to_create_tmp_view"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="ctas_with_tmp_tables_to_create_tmp_view-760"><a href="#ctas_with_tmp_tables_to_create_tmp_view-760"><span class="linenos">760</span></a><span class="k">def</span><span class="w"> </span><span class="nf">ctas_with_tmp_tables_to_create_tmp_view</span><span class="p">(</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-761"><a href="#ctas_with_tmp_tables_to_create_tmp_view-761"><span class="linenos">761</span></a> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">,</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-762"><a href="#ctas_with_tmp_tables_to_create_tmp_view-762"><span class="linenos">762</span></a> <span class="n">tmp_storage_provider</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">e</span><span class="p">,</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-763"><a href="#ctas_with_tmp_tables_to_create_tmp_view-763"><span class="linenos">763</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-764"><a href="#ctas_with_tmp_tables_to_create_tmp_view-764"><span class="linenos">764</span></a> <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Create</span><span class="p">)</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-765"><a href="#ctas_with_tmp_tables_to_create_tmp_view-765"><span class="linenos">765</span></a> <span class="n">properties</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"properties"</span><span class="p">)</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-766"><a href="#ctas_with_tmp_tables_to_create_tmp_view-766"><span class="linenos">766</span></a> <span class="n">temporary</span> <span class="o">=</span> <span class="nb">any</span><span class="p">(</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-767"><a href="#ctas_with_tmp_tables_to_create_tmp_view-767"><span class="linenos">767</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">prop</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TemporaryProperty</span><span class="p">)</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-768"><a href="#ctas_with_tmp_tables_to_create_tmp_view-768"><span class="linenos">768</span></a> <span class="k">for</span> <span class="n">prop</span> <span class="ow">in</span> <span class="p">(</span><span class="n">properties</span><span class="o">.</span><span class="n">expressions</span> <span class="k">if</span> <span class="n">properties</span> <span class="k">else</span> <span class="p">[])</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-769"><a href="#ctas_with_tmp_tables_to_create_tmp_view-769"><span class="linenos">769</span></a> <span class="p">)</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-770"><a href="#ctas_with_tmp_tables_to_create_tmp_view-770"><span class="linenos">770</span></a>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-771"><a href="#ctas_with_tmp_tables_to_create_tmp_view-771"><span class="linenos">771</span></a> <span class="c1"># CTAS with temp tables map to CREATE TEMPORARY VIEW</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-772"><a href="#ctas_with_tmp_tables_to_create_tmp_view-772"><span class="linenos">772</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">kind</span> <span class="o">==</span> <span class="s2">"TABLE"</span> <span class="ow">and</span> <span class="n">temporary</span><span class="p">:</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-773"><a href="#ctas_with_tmp_tables_to_create_tmp_view-773"><span class="linenos">773</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="p">:</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-774"><a href="#ctas_with_tmp_tables_to_create_tmp_view-774"><span class="linenos">774</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Create</span><span class="p">(</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-775"><a href="#ctas_with_tmp_tables_to_create_tmp_view-775"><span class="linenos">775</span></a> <span class="n">kind</span><span class="o">=</span><span class="s2">"TEMPORARY VIEW"</span><span class="p">,</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-776"><a href="#ctas_with_tmp_tables_to_create_tmp_view-776"><span class="linenos">776</span></a> <span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-777"><a href="#ctas_with_tmp_tables_to_create_tmp_view-777"><span class="linenos">777</span></a> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-778"><a href="#ctas_with_tmp_tables_to_create_tmp_view-778"><span class="linenos">778</span></a> <span class="p">)</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-779"><a href="#ctas_with_tmp_tables_to_create_tmp_view-779"><span class="linenos">779</span></a> <span class="k">return</span> <span class="n">tmp_storage_provider</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-780"><a href="#ctas_with_tmp_tables_to_create_tmp_view-780"><span class="linenos">780</span></a>
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</span><span id="ctas_with_tmp_tables_to_create_tmp_view-781"><a href="#ctas_with_tmp_tables_to_create_tmp_view-781"><span class="linenos">781</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span></pre></div>
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</section>
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<section id="move_schema_columns_to_partitioned_by">
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<input id="move_schema_columns_to_partitioned_by-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
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<span class="def">def</span>
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<span class="name">move_schema_columns_to_partitioned_by</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="move_schema_columns_to_partitioned_by-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#move_schema_columns_to_partitioned_by"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="move_schema_columns_to_partitioned_by-784"><a href="#move_schema_columns_to_partitioned_by-784"><span class="linenos">784</span></a><span class="k">def</span><span class="w"> </span><span class="nf">move_schema_columns_to_partitioned_by</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="move_schema_columns_to_partitioned_by-785"><a href="#move_schema_columns_to_partitioned_by-785"><span class="linenos">785</span></a><span class="w"> </span><span class="sd">"""</span>
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</span><span id="move_schema_columns_to_partitioned_by-786"><a href="#move_schema_columns_to_partitioned_by-786"><span class="linenos">786</span></a><span class="sd"> In Hive, the PARTITIONED BY property acts as an extension of a table's schema. When the</span>
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</span><span id="move_schema_columns_to_partitioned_by-787"><a href="#move_schema_columns_to_partitioned_by-787"><span class="linenos">787</span></a><span class="sd"> PARTITIONED BY value is an array of column names, they are transformed into a schema.</span>
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</span><span id="move_schema_columns_to_partitioned_by-788"><a href="#move_schema_columns_to_partitioned_by-788"><span class="linenos">788</span></a><span class="sd"> The corresponding columns are removed from the create statement.</span>
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</span><span id="move_schema_columns_to_partitioned_by-789"><a href="#move_schema_columns_to_partitioned_by-789"><span class="linenos">789</span></a><span class="sd"> """</span>
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</span><span id="move_schema_columns_to_partitioned_by-790"><a href="#move_schema_columns_to_partitioned_by-790"><span class="linenos">790</span></a> <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Create</span><span class="p">)</span>
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</span><span id="move_schema_columns_to_partitioned_by-791"><a href="#move_schema_columns_to_partitioned_by-791"><span class="linenos">791</span></a> <span class="n">has_schema</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Schema</span><span class="p">)</span>
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</span><span id="move_schema_columns_to_partitioned_by-792"><a href="#move_schema_columns_to_partitioned_by-792"><span class="linenos">792</span></a> <span class="n">is_partitionable</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">kind</span> <span class="ow">in</span> <span class="p">{</span><span class="s2">"TABLE"</span><span class="p">,</span> <span class="s2">"VIEW"</span><span class="p">}</span>
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</span><span id="move_schema_columns_to_partitioned_by-793"><a href="#move_schema_columns_to_partitioned_by-793"><span class="linenos">793</span></a>
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</span><span id="move_schema_columns_to_partitioned_by-794"><a href="#move_schema_columns_to_partitioned_by-794"><span class="linenos">794</span></a> <span class="k">if</span> <span class="n">has_schema</span> <span class="ow">and</span> <span class="n">is_partitionable</span><span class="p">:</span>
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</span><span id="move_schema_columns_to_partitioned_by-795"><a href="#move_schema_columns_to_partitioned_by-795"><span class="linenos">795</span></a> <span class="n">prop</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">PartitionedByProperty</span><span class="p">)</span>
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</span><span id="move_schema_columns_to_partitioned_by-796"><a href="#move_schema_columns_to_partitioned_by-796"><span class="linenos">796</span></a> <span class="k">if</span> <span class="n">prop</span> <span class="ow">and</span> <span class="n">prop</span><span class="o">.</span><span class="n">this</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">prop</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Schema</span><span class="p">):</span>
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</span><span id="move_schema_columns_to_partitioned_by-797"><a href="#move_schema_columns_to_partitioned_by-797"><span class="linenos">797</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span>
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</span><span id="move_schema_columns_to_partitioned_by-798"><a href="#move_schema_columns_to_partitioned_by-798"><span class="linenos">798</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">v</span><span class="o">.</span><span class="n">name</span><span class="o">.</span><span class="n">upper</span><span class="p">()</span> <span class="k">for</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">prop</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">expressions</span><span class="p">}</span>
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</span><span id="move_schema_columns_to_partitioned_by-799"><a href="#move_schema_columns_to_partitioned_by-799"><span class="linenos">799</span></a> <span class="n">partitions</span> <span class="o">=</span> <span class="p">[</span><span class="n">col</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">schema</span><span class="o">.</span><span class="n">expressions</span> <span class="k">if</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span><span class="o">.</span><span class="n">upper</span><span class="p">()</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">]</span>
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</span><span id="move_schema_columns_to_partitioned_by-800"><a href="#move_schema_columns_to_partitioned_by-800"><span class="linenos">800</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="p">[</span><span class="n">e</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">schema</span><span class="o">.</span><span class="n">expressions</span> <span class="k">if</span> <span class="n">e</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">partitions</span><span class="p">])</span>
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</span><span id="move_schema_columns_to_partitioned_by-801"><a href="#move_schema_columns_to_partitioned_by-801"><span class="linenos">801</span></a> <span class="n">prop</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">PartitionedByProperty</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">Schema</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="n">partitions</span><span class="p">)))</span>
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</span><span id="move_schema_columns_to_partitioned_by-802"><a href="#move_schema_columns_to_partitioned_by-802"><span class="linenos">802</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span>
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</span><span id="move_schema_columns_to_partitioned_by-803"><a href="#move_schema_columns_to_partitioned_by-803"><span class="linenos">803</span></a>
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|
</span><span id="move_schema_columns_to_partitioned_by-804"><a href="#move_schema_columns_to_partitioned_by-804"><span class="linenos">804</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span></pre></div>
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<div class="docstring"><p>In Hive, the PARTITIONED BY property acts as an extension of a table's schema. When the
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|
PARTITIONED BY value is an array of column names, they are transformed into a schema.
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The corresponding columns are removed from the create statement.</p>
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</div>
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</section>
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<section id="move_partitioned_by_to_schema_columns">
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<input id="move_partitioned_by_to_schema_columns-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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<div class="attr function">
|
|
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<span class="def">def</span>
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<span class="name">move_partitioned_by_to_schema_columns</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="move_partitioned_by_to_schema_columns-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#move_partitioned_by_to_schema_columns"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="move_partitioned_by_to_schema_columns-807"><a href="#move_partitioned_by_to_schema_columns-807"><span class="linenos">807</span></a><span class="k">def</span><span class="w"> </span><span class="nf">move_partitioned_by_to_schema_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="move_partitioned_by_to_schema_columns-808"><a href="#move_partitioned_by_to_schema_columns-808"><span class="linenos">808</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="move_partitioned_by_to_schema_columns-809"><a href="#move_partitioned_by_to_schema_columns-809"><span class="linenos">809</span></a><span class="sd"> Spark 3 supports both "HIVEFORMAT" and "DATASOURCE" formats for CREATE TABLE.</span>
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</span><span id="move_partitioned_by_to_schema_columns-810"><a href="#move_partitioned_by_to_schema_columns-810"><span class="linenos">810</span></a>
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|
</span><span id="move_partitioned_by_to_schema_columns-811"><a href="#move_partitioned_by_to_schema_columns-811"><span class="linenos">811</span></a><span class="sd"> Currently, SQLGlot uses the DATASOURCE format for Spark 3.</span>
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</span><span id="move_partitioned_by_to_schema_columns-812"><a href="#move_partitioned_by_to_schema_columns-812"><span class="linenos">812</span></a><span class="sd"> """</span>
|
|
</span><span id="move_partitioned_by_to_schema_columns-813"><a href="#move_partitioned_by_to_schema_columns-813"><span class="linenos">813</span></a> <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Create</span><span class="p">)</span>
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</span><span id="move_partitioned_by_to_schema_columns-814"><a href="#move_partitioned_by_to_schema_columns-814"><span class="linenos">814</span></a> <span class="n">prop</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">PartitionedByProperty</span><span class="p">)</span>
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|
</span><span id="move_partitioned_by_to_schema_columns-815"><a href="#move_partitioned_by_to_schema_columns-815"><span class="linenos">815</span></a> <span class="k">if</span> <span class="p">(</span>
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|
</span><span id="move_partitioned_by_to_schema_columns-816"><a href="#move_partitioned_by_to_schema_columns-816"><span class="linenos">816</span></a> <span class="n">prop</span>
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</span><span id="move_partitioned_by_to_schema_columns-817"><a href="#move_partitioned_by_to_schema_columns-817"><span class="linenos">817</span></a> <span class="ow">and</span> <span class="n">prop</span><span class="o">.</span><span class="n">this</span>
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</span><span id="move_partitioned_by_to_schema_columns-818"><a href="#move_partitioned_by_to_schema_columns-818"><span class="linenos">818</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">prop</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Schema</span><span class="p">)</span>
|
|
</span><span id="move_partitioned_by_to_schema_columns-819"><a href="#move_partitioned_by_to_schema_columns-819"><span class="linenos">819</span></a> <span class="ow">and</span> <span class="nb">all</span><span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ColumnDef</span><span class="p">)</span> <span class="ow">and</span> <span class="n">e</span><span class="o">.</span><span class="n">kind</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">prop</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span>
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|
</span><span id="move_partitioned_by_to_schema_columns-820"><a href="#move_partitioned_by_to_schema_columns-820"><span class="linenos">820</span></a> <span class="p">):</span>
|
|
</span><span id="move_partitioned_by_to_schema_columns-821"><a href="#move_partitioned_by_to_schema_columns-821"><span class="linenos">821</span></a> <span class="n">prop_this</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Tuple</span><span class="p">(</span>
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|
</span><span id="move_partitioned_by_to_schema_columns-822"><a href="#move_partitioned_by_to_schema_columns-822"><span class="linenos">822</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">prop</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">expressions</span><span class="p">]</span>
|
|
</span><span id="move_partitioned_by_to_schema_columns-823"><a href="#move_partitioned_by_to_schema_columns-823"><span class="linenos">823</span></a> <span class="p">)</span>
|
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</span><span id="move_partitioned_by_to_schema_columns-824"><a href="#move_partitioned_by_to_schema_columns-824"><span class="linenos">824</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span>
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|
</span><span id="move_partitioned_by_to_schema_columns-825"><a href="#move_partitioned_by_to_schema_columns-825"><span class="linenos">825</span></a> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">prop</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span>
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|
</span><span id="move_partitioned_by_to_schema_columns-826"><a href="#move_partitioned_by_to_schema_columns-826"><span class="linenos">826</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">e</span><span class="p">)</span>
|
|
</span><span id="move_partitioned_by_to_schema_columns-827"><a href="#move_partitioned_by_to_schema_columns-827"><span class="linenos">827</span></a> <span class="n">prop</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">prop_this</span><span class="p">)</span>
|
|
</span><span id="move_partitioned_by_to_schema_columns-828"><a href="#move_partitioned_by_to_schema_columns-828"><span class="linenos">828</span></a>
|
|
</span><span id="move_partitioned_by_to_schema_columns-829"><a href="#move_partitioned_by_to_schema_columns-829"><span class="linenos">829</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Spark 3 supports both "HIVEFORMAT" and "DATASOURCE" formats for CREATE TABLE.</p>
|
|
|
|
<p>Currently, SQLGlot uses the DATASOURCE format for Spark 3.</p>
|
|
</div>
|
|
|
|
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</section>
|
|
<section id="struct_kv_to_alias">
|
|
<input id="struct_kv_to_alias-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
|
<div class="attr function">
|
|
|
|
<span class="def">def</span>
|
|
<span class="name">struct_kv_to_alias</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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<label class="view-source-button" for="struct_kv_to_alias-view-source"><span>View Source</span></label>
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</div>
|
|
<a class="headerlink" href="#struct_kv_to_alias"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="struct_kv_to_alias-832"><a href="#struct_kv_to_alias-832"><span class="linenos">832</span></a><span class="k">def</span><span class="w"> </span><span class="nf">struct_kv_to_alias</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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|
</span><span id="struct_kv_to_alias-833"><a href="#struct_kv_to_alias-833"><span class="linenos">833</span></a><span class="w"> </span><span class="sd">"""Converts struct arguments to aliases, e.g. STRUCT(1 AS y)."""</span>
|
|
</span><span id="struct_kv_to_alias-834"><a href="#struct_kv_to_alias-834"><span class="linenos">834</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Struct</span><span class="p">):</span>
|
|
</span><span id="struct_kv_to_alias-835"><a href="#struct_kv_to_alias-835"><span class="linenos">835</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span>
|
|
</span><span id="struct_kv_to_alias-836"><a href="#struct_kv_to_alias-836"><span class="linenos">836</span></a> <span class="s2">"expressions"</span><span class="p">,</span>
|
|
</span><span id="struct_kv_to_alias-837"><a href="#struct_kv_to_alias-837"><span class="linenos">837</span></a> <span class="p">[</span>
|
|
</span><span id="struct_kv_to_alias-838"><a href="#struct_kv_to_alias-838"><span class="linenos">838</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">e</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">PropertyEQ</span><span class="p">)</span> <span class="k">else</span> <span class="n">e</span>
|
|
</span><span id="struct_kv_to_alias-839"><a href="#struct_kv_to_alias-839"><span class="linenos">839</span></a> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span>
|
|
</span><span id="struct_kv_to_alias-840"><a href="#struct_kv_to_alias-840"><span class="linenos">840</span></a> <span class="p">],</span>
|
|
</span><span id="struct_kv_to_alias-841"><a href="#struct_kv_to_alias-841"><span class="linenos">841</span></a> <span class="p">)</span>
|
|
</span><span id="struct_kv_to_alias-842"><a href="#struct_kv_to_alias-842"><span class="linenos">842</span></a>
|
|
</span><span id="struct_kv_to_alias-843"><a href="#struct_kv_to_alias-843"><span class="linenos">843</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Converts struct arguments to aliases, e.g. STRUCT(1 AS y).</p>
|
|
</div>
|
|
|
|
|
|
</section>
|
|
<section id="eliminate_join_marks">
|
|
<input id="eliminate_join_marks-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
|
<div class="attr function">
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|
|
|
<span class="def">def</span>
|
|
<span class="name">eliminate_join_marks</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
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|
|
<label class="view-source-button" for="eliminate_join_marks-view-source"><span>View Source</span></label>
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|
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|
</div>
|
|
<a class="headerlink" href="#eliminate_join_marks"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="eliminate_join_marks-846"><a href="#eliminate_join_marks-846"><span class="linenos">846</span></a><span class="k">def</span><span class="w"> </span><span class="nf">eliminate_join_marks</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
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</span><span id="eliminate_join_marks-847"><a href="#eliminate_join_marks-847"><span class="linenos">847</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="eliminate_join_marks-848"><a href="#eliminate_join_marks-848"><span class="linenos">848</span></a><span class="sd"> Remove join marks from an AST. This rule assumes that all marked columns are qualified.</span>
|
|
</span><span id="eliminate_join_marks-849"><a href="#eliminate_join_marks-849"><span class="linenos">849</span></a><span class="sd"> If this does not hold for a query, consider running `sqlglot.optimizer.qualify` first.</span>
|
|
</span><span id="eliminate_join_marks-850"><a href="#eliminate_join_marks-850"><span class="linenos">850</span></a>
|
|
</span><span id="eliminate_join_marks-851"><a href="#eliminate_join_marks-851"><span class="linenos">851</span></a><span class="sd"> For example,</span>
|
|
</span><span id="eliminate_join_marks-852"><a href="#eliminate_join_marks-852"><span class="linenos">852</span></a><span class="sd"> SELECT * FROM a, b WHERE a.id = b.id(+) -- ... is converted to</span>
|
|
</span><span id="eliminate_join_marks-853"><a href="#eliminate_join_marks-853"><span class="linenos">853</span></a><span class="sd"> SELECT * FROM a LEFT JOIN b ON a.id = b.id -- this</span>
|
|
</span><span id="eliminate_join_marks-854"><a href="#eliminate_join_marks-854"><span class="linenos">854</span></a>
|
|
</span><span id="eliminate_join_marks-855"><a href="#eliminate_join_marks-855"><span class="linenos">855</span></a><span class="sd"> Args:</span>
|
|
</span><span id="eliminate_join_marks-856"><a href="#eliminate_join_marks-856"><span class="linenos">856</span></a><span class="sd"> expression: The AST to remove join marks from.</span>
|
|
</span><span id="eliminate_join_marks-857"><a href="#eliminate_join_marks-857"><span class="linenos">857</span></a>
|
|
</span><span id="eliminate_join_marks-858"><a href="#eliminate_join_marks-858"><span class="linenos">858</span></a><span class="sd"> Returns:</span>
|
|
</span><span id="eliminate_join_marks-859"><a href="#eliminate_join_marks-859"><span class="linenos">859</span></a><span class="sd"> The AST with join marks removed.</span>
|
|
</span><span id="eliminate_join_marks-860"><a href="#eliminate_join_marks-860"><span class="linenos">860</span></a><span class="sd"> """</span>
|
|
</span><span id="eliminate_join_marks-861"><a href="#eliminate_join_marks-861"><span class="linenos">861</span></a> <span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.optimizer.scope</span><span class="w"> </span><span class="kn">import</span> <span class="n">traverse_scope</span>
|
|
</span><span id="eliminate_join_marks-862"><a href="#eliminate_join_marks-862"><span class="linenos">862</span></a>
|
|
</span><span id="eliminate_join_marks-863"><a href="#eliminate_join_marks-863"><span class="linenos">863</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span>
|
|
</span><span id="eliminate_join_marks-864"><a href="#eliminate_join_marks-864"><span class="linenos">864</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span>
|
|
</span><span id="eliminate_join_marks-865"><a href="#eliminate_join_marks-865"><span class="linenos">865</span></a>
|
|
</span><span id="eliminate_join_marks-866"><a href="#eliminate_join_marks-866"><span class="linenos">866</span></a> <span class="n">where</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span>
|
|
</span><span id="eliminate_join_marks-867"><a href="#eliminate_join_marks-867"><span class="linenos">867</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span>
|
|
</span><span id="eliminate_join_marks-868"><a href="#eliminate_join_marks-868"><span class="linenos">868</span></a>
|
|
</span><span id="eliminate_join_marks-869"><a href="#eliminate_join_marks-869"><span class="linenos">869</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">where</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">joins</span><span class="p">:</span>
|
|
</span><span id="eliminate_join_marks-870"><a href="#eliminate_join_marks-870"><span class="linenos">870</span></a> <span class="k">continue</span>
|
|
</span><span id="eliminate_join_marks-871"><a href="#eliminate_join_marks-871"><span class="linenos">871</span></a>
|
|
</span><span id="eliminate_join_marks-872"><a href="#eliminate_join_marks-872"><span class="linenos">872</span></a> <span class="n">query_from</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"from"</span><span class="p">]</span>
|
|
</span><span id="eliminate_join_marks-873"><a href="#eliminate_join_marks-873"><span class="linenos">873</span></a>
|
|
</span><span id="eliminate_join_marks-874"><a href="#eliminate_join_marks-874"><span class="linenos">874</span></a> <span class="c1"># These keep track of the joins to be replaced</span>
|
|
</span><span id="eliminate_join_marks-875"><a href="#eliminate_join_marks-875"><span class="linenos">875</span></a> <span class="n">new_joins</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span>
|
|
</span><span id="eliminate_join_marks-876"><a href="#eliminate_join_marks-876"><span class="linenos">876</span></a> <span class="n">old_joins</span> <span class="o">=</span> <span class="p">{</span><span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">join</span> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">}</span>
|
|
</span><span id="eliminate_join_marks-877"><a href="#eliminate_join_marks-877"><span class="linenos">877</span></a>
|
|
</span><span id="eliminate_join_marks-878"><a href="#eliminate_join_marks-878"><span class="linenos">878</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span>
|
|
</span><span id="eliminate_join_marks-879"><a href="#eliminate_join_marks-879"><span class="linenos">879</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"join_mark"</span><span class="p">):</span>
|
|
</span><span id="eliminate_join_marks-880"><a href="#eliminate_join_marks-880"><span class="linenos">880</span></a> <span class="k">continue</span>
|
|
</span><span id="eliminate_join_marks-881"><a href="#eliminate_join_marks-881"><span class="linenos">881</span></a>
|
|
</span><span id="eliminate_join_marks-882"><a href="#eliminate_join_marks-882"><span class="linenos">882</span></a> <span class="n">predicate</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span>
|
|
</span><span id="eliminate_join_marks-883"><a href="#eliminate_join_marks-883"><span class="linenos">883</span></a> <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span>
|
|
</span><span id="eliminate_join_marks-884"><a href="#eliminate_join_marks-884"><span class="linenos">884</span></a> <span class="n">predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span>
|
|
</span><span id="eliminate_join_marks-885"><a href="#eliminate_join_marks-885"><span class="linenos">885</span></a> <span class="p">),</span> <span class="s2">"Columns can only be marked with (+) when involved in a binary operation"</span>
|
|
</span><span id="eliminate_join_marks-886"><a href="#eliminate_join_marks-886"><span class="linenos">886</span></a>
|
|
</span><span id="eliminate_join_marks-887"><a href="#eliminate_join_marks-887"><span class="linenos">887</span></a> <span class="n">predicate_parent</span> <span class="o">=</span> <span class="n">predicate</span><span class="o">.</span><span class="n">parent</span>
|
|
</span><span id="eliminate_join_marks-888"><a href="#eliminate_join_marks-888"><span class="linenos">888</span></a> <span class="n">join_predicate</span> <span class="o">=</span> <span class="n">predicate</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
|
|
</span><span id="eliminate_join_marks-889"><a href="#eliminate_join_marks-889"><span class="linenos">889</span></a>
|
|
</span><span id="eliminate_join_marks-890"><a href="#eliminate_join_marks-890"><span class="linenos">890</span></a> <span class="n">left_columns</span> <span class="o">=</span> <span class="p">[</span>
|
|
</span><span id="eliminate_join_marks-891"><a href="#eliminate_join_marks-891"><span class="linenos">891</span></a> <span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">join_predicate</span><span class="o">.</span><span class="n">left</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">if</span> <span class="n">c</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"join_mark"</span><span class="p">)</span>
|
|
</span><span id="eliminate_join_marks-892"><a href="#eliminate_join_marks-892"><span class="linenos">892</span></a> <span class="p">]</span>
|
|
</span><span id="eliminate_join_marks-893"><a href="#eliminate_join_marks-893"><span class="linenos">893</span></a> <span class="n">right_columns</span> <span class="o">=</span> <span class="p">[</span>
|
|
</span><span id="eliminate_join_marks-894"><a href="#eliminate_join_marks-894"><span class="linenos">894</span></a> <span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">join_predicate</span><span class="o">.</span><span class="n">right</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">if</span> <span class="n">c</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"join_mark"</span><span class="p">)</span>
|
|
</span><span id="eliminate_join_marks-895"><a href="#eliminate_join_marks-895"><span class="linenos">895</span></a> <span class="p">]</span>
|
|
</span><span id="eliminate_join_marks-896"><a href="#eliminate_join_marks-896"><span class="linenos">896</span></a>
|
|
</span><span id="eliminate_join_marks-897"><a href="#eliminate_join_marks-897"><span class="linenos">897</span></a> <span class="k">assert</span> <span class="ow">not</span> <span class="p">(</span>
|
|
</span><span id="eliminate_join_marks-898"><a href="#eliminate_join_marks-898"><span class="linenos">898</span></a> <span class="n">left_columns</span> <span class="ow">and</span> <span class="n">right_columns</span>
|
|
</span><span id="eliminate_join_marks-899"><a href="#eliminate_join_marks-899"><span class="linenos">899</span></a> <span class="p">),</span> <span class="s2">"The (+) marker cannot appear in both sides of a binary predicate"</span>
|
|
</span><span id="eliminate_join_marks-900"><a href="#eliminate_join_marks-900"><span class="linenos">900</span></a>
|
|
</span><span id="eliminate_join_marks-901"><a href="#eliminate_join_marks-901"><span class="linenos">901</span></a> <span class="n">marked_column_tables</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
|
|
</span><span id="eliminate_join_marks-902"><a href="#eliminate_join_marks-902"><span class="linenos">902</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">left_columns</span> <span class="ow">or</span> <span class="n">right_columns</span><span class="p">:</span>
|
|
</span><span id="eliminate_join_marks-903"><a href="#eliminate_join_marks-903"><span class="linenos">903</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span>
|
|
</span><span id="eliminate_join_marks-904"><a href="#eliminate_join_marks-904"><span class="linenos">904</span></a> <span class="k">assert</span> <span class="n">table</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"Column </span><span class="si">{</span><span class="n">col</span><span class="si">}</span><span class="s2"> needs to be qualified with a table"</span>
|
|
</span><span id="eliminate_join_marks-905"><a href="#eliminate_join_marks-905"><span class="linenos">905</span></a>
|
|
</span><span id="eliminate_join_marks-906"><a href="#eliminate_join_marks-906"><span class="linenos">906</span></a> <span class="n">col</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"join_mark"</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span>
|
|
</span><span id="eliminate_join_marks-907"><a href="#eliminate_join_marks-907"><span class="linenos">907</span></a> <span class="n">marked_column_tables</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">table</span><span class="p">)</span>
|
|
</span><span id="eliminate_join_marks-908"><a href="#eliminate_join_marks-908"><span class="linenos">908</span></a>
|
|
</span><span id="eliminate_join_marks-909"><a href="#eliminate_join_marks-909"><span class="linenos">909</span></a> <span class="k">assert</span> <span class="p">(</span>
|
|
</span><span id="eliminate_join_marks-910"><a href="#eliminate_join_marks-910"><span class="linenos">910</span></a> <span class="nb">len</span><span class="p">(</span><span class="n">marked_column_tables</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span>
|
|
</span><span id="eliminate_join_marks-911"><a href="#eliminate_join_marks-911"><span class="linenos">911</span></a> <span class="p">),</span> <span class="s2">"Columns of only a single table can be marked with (+) in a given binary predicate"</span>
|
|
</span><span id="eliminate_join_marks-912"><a href="#eliminate_join_marks-912"><span class="linenos">912</span></a>
|
|
</span><span id="eliminate_join_marks-913"><a href="#eliminate_join_marks-913"><span class="linenos">913</span></a> <span class="c1"># Add predicate if join already copied, or add join if it is new</span>
|
|
</span><span id="eliminate_join_marks-914"><a href="#eliminate_join_marks-914"><span class="linenos">914</span></a> <span class="n">join_this</span> <span class="o">=</span> <span class="n">old_joins</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">col</span><span class="o">.</span><span class="n">table</span><span class="p">,</span> <span class="n">query_from</span><span class="p">)</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="eliminate_join_marks-915"><a href="#eliminate_join_marks-915"><span class="linenos">915</span></a> <span class="n">existing_join</span> <span class="o">=</span> <span class="n">new_joins</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">join_this</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">)</span>
|
|
</span><span id="eliminate_join_marks-916"><a href="#eliminate_join_marks-916"><span class="linenos">916</span></a> <span class="k">if</span> <span class="n">existing_join</span><span class="p">:</span>
|
|
</span><span id="eliminate_join_marks-917"><a href="#eliminate_join_marks-917"><span class="linenos">917</span></a> <span class="n">existing_join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="n">existing_join</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"on"</span><span class="p">],</span> <span class="n">join_predicate</span><span class="p">))</span>
|
|
</span><span id="eliminate_join_marks-918"><a href="#eliminate_join_marks-918"><span class="linenos">918</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="eliminate_join_marks-919"><a href="#eliminate_join_marks-919"><span class="linenos">919</span></a> <span class="n">new_joins</span><span class="p">[</span><span class="n">join_this</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">(</span>
|
|
</span><span id="eliminate_join_marks-920"><a href="#eliminate_join_marks-920"><span class="linenos">920</span></a> <span class="n">this</span><span class="o">=</span><span class="n">join_this</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">on</span><span class="o">=</span><span class="n">join_predicate</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">kind</span><span class="o">=</span><span class="s2">"LEFT"</span>
|
|
</span><span id="eliminate_join_marks-921"><a href="#eliminate_join_marks-921"><span class="linenos">921</span></a> <span class="p">)</span>
|
|
</span><span id="eliminate_join_marks-922"><a href="#eliminate_join_marks-922"><span class="linenos">922</span></a>
|
|
</span><span id="eliminate_join_marks-923"><a href="#eliminate_join_marks-923"><span class="linenos">923</span></a> <span class="c1"># If the parent of the target predicate is a binary node, then it now has only one child</span>
|
|
</span><span id="eliminate_join_marks-924"><a href="#eliminate_join_marks-924"><span class="linenos">924</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate_parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">):</span>
|
|
</span><span id="eliminate_join_marks-925"><a href="#eliminate_join_marks-925"><span class="linenos">925</span></a> <span class="k">if</span> <span class="n">predicate_parent</span><span class="o">.</span><span class="n">left</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="eliminate_join_marks-926"><a href="#eliminate_join_marks-926"><span class="linenos">926</span></a> <span class="n">predicate_parent</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">predicate_parent</span><span class="o">.</span><span class="n">right</span><span class="p">)</span>
|
|
</span><span id="eliminate_join_marks-927"><a href="#eliminate_join_marks-927"><span class="linenos">927</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="eliminate_join_marks-928"><a href="#eliminate_join_marks-928"><span class="linenos">928</span></a> <span class="n">predicate_parent</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">predicate_parent</span><span class="o">.</span><span class="n">left</span><span class="p">)</span>
|
|
</span><span id="eliminate_join_marks-929"><a href="#eliminate_join_marks-929"><span class="linenos">929</span></a>
|
|
</span><span id="eliminate_join_marks-930"><a href="#eliminate_join_marks-930"><span class="linenos">930</span></a> <span class="k">if</span> <span class="n">query_from</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">new_joins</span><span class="p">:</span>
|
|
</span><span id="eliminate_join_marks-931"><a href="#eliminate_join_marks-931"><span class="linenos">931</span></a> <span class="n">only_old_joins</span> <span class="o">=</span> <span class="n">old_joins</span><span class="o">.</span><span class="n">keys</span><span class="p">()</span> <span class="o">-</span> <span class="n">new_joins</span><span class="o">.</span><span class="n">keys</span><span class="p">()</span>
|
|
</span><span id="eliminate_join_marks-932"><a href="#eliminate_join_marks-932"><span class="linenos">932</span></a> <span class="k">assert</span> <span class="p">(</span>
|
|
</span><span id="eliminate_join_marks-933"><a href="#eliminate_join_marks-933"><span class="linenos">933</span></a> <span class="nb">len</span><span class="p">(</span><span class="n">only_old_joins</span><span class="p">)</span> <span class="o">>=</span> <span class="mi">1</span>
|
|
</span><span id="eliminate_join_marks-934"><a href="#eliminate_join_marks-934"><span class="linenos">934</span></a> <span class="p">),</span> <span class="s2">"Cannot determine which table to use in the new FROM clause"</span>
|
|
</span><span id="eliminate_join_marks-935"><a href="#eliminate_join_marks-935"><span class="linenos">935</span></a>
|
|
</span><span id="eliminate_join_marks-936"><a href="#eliminate_join_marks-936"><span class="linenos">936</span></a> <span class="n">new_from_name</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">only_old_joins</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
|
|
</span><span id="eliminate_join_marks-937"><a href="#eliminate_join_marks-937"><span class="linenos">937</span></a> <span class="n">query</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"from"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">old_joins</span><span class="p">[</span><span class="n">new_from_name</span><span class="p">]</span><span class="o">.</span><span class="n">this</span><span class="p">))</span>
|
|
</span><span id="eliminate_join_marks-938"><a href="#eliminate_join_marks-938"><span class="linenos">938</span></a>
|
|
</span><span id="eliminate_join_marks-939"><a href="#eliminate_join_marks-939"><span class="linenos">939</span></a> <span class="k">if</span> <span class="n">new_joins</span><span class="p">:</span>
|
|
</span><span id="eliminate_join_marks-940"><a href="#eliminate_join_marks-940"><span class="linenos">940</span></a> <span class="n">query</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="nb">list</span><span class="p">(</span><span class="n">new_joins</span><span class="o">.</span><span class="n">values</span><span class="p">()))</span>
|
|
</span><span id="eliminate_join_marks-941"><a href="#eliminate_join_marks-941"><span class="linenos">941</span></a>
|
|
</span><span id="eliminate_join_marks-942"><a href="#eliminate_join_marks-942"><span class="linenos">942</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">:</span>
|
|
</span><span id="eliminate_join_marks-943"><a href="#eliminate_join_marks-943"><span class="linenos">943</span></a> <span class="n">where</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
|
|
</span><span id="eliminate_join_marks-944"><a href="#eliminate_join_marks-944"><span class="linenos">944</span></a>
|
|
</span><span id="eliminate_join_marks-945"><a href="#eliminate_join_marks-945"><span class="linenos">945</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Remove join marks from an AST. This rule assumes that all marked columns are qualified.
|
|
If this does not hold for a query, consider running <code><a href="optimizer/qualify.html">sqlglot.optimizer.qualify</a></code> first.</p>
|
|
|
|
<p>For example,
|
|
SELECT * FROM a, b WHERE a.id = b.id(+) -- ... is converted to
|
|
SELECT * FROM a LEFT JOIN b ON a.id = b.id -- this</p>
|
|
|
|
<h6 id="arguments">Arguments:</h6>
|
|
|
|
<ul>
|
|
<li><strong>expression:</strong> The AST to remove join marks from.</li>
|
|
</ul>
|
|
|
|
<h6 id="returns">Returns:</h6>
|
|
|
|
<blockquote>
|
|
<p>The AST with join marks removed.</p>
|
|
</blockquote>
|
|
</div>
|
|
|
|
|
|
</section>
|
|
<section id="any_to_exists">
|
|
<input id="any_to_exists-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
|
<div class="attr function">
|
|
|
|
<span class="def">def</span>
|
|
<span class="name">any_to_exists</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
|
|
|
|
<label class="view-source-button" for="any_to_exists-view-source"><span>View Source</span></label>
|
|
|
|
</div>
|
|
<a class="headerlink" href="#any_to_exists"></a>
|
|
<div class="pdoc-code codehilite"><pre><span></span><span id="any_to_exists-948"><a href="#any_to_exists-948"><span class="linenos">948</span></a><span class="k">def</span><span class="w"> </span><span class="nf">any_to_exists</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
|
</span><span id="any_to_exists-949"><a href="#any_to_exists-949"><span class="linenos">949</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="any_to_exists-950"><a href="#any_to_exists-950"><span class="linenos">950</span></a><span class="sd"> Transform ANY operator to Spark's EXISTS</span>
|
|
</span><span id="any_to_exists-951"><a href="#any_to_exists-951"><span class="linenos">951</span></a>
|
|
</span><span id="any_to_exists-952"><a href="#any_to_exists-952"><span class="linenos">952</span></a><span class="sd"> For example,</span>
|
|
</span><span id="any_to_exists-953"><a href="#any_to_exists-953"><span class="linenos">953</span></a><span class="sd"> - Postgres: SELECT * FROM tbl WHERE 5 > ANY(tbl.col)</span>
|
|
</span><span id="any_to_exists-954"><a href="#any_to_exists-954"><span class="linenos">954</span></a><span class="sd"> - Spark: SELECT * FROM tbl WHERE EXISTS(tbl.col, x -> x < 5)</span>
|
|
</span><span id="any_to_exists-955"><a href="#any_to_exists-955"><span class="linenos">955</span></a>
|
|
</span><span id="any_to_exists-956"><a href="#any_to_exists-956"><span class="linenos">956</span></a><span class="sd"> Both ANY and EXISTS accept queries but currently only array expressions are supported for this</span>
|
|
</span><span id="any_to_exists-957"><a href="#any_to_exists-957"><span class="linenos">957</span></a><span class="sd"> transformation</span>
|
|
</span><span id="any_to_exists-958"><a href="#any_to_exists-958"><span class="linenos">958</span></a><span class="sd"> """</span>
|
|
</span><span id="any_to_exists-959"><a href="#any_to_exists-959"><span class="linenos">959</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
|
|
</span><span id="any_to_exists-960"><a href="#any_to_exists-960"><span class="linenos">960</span></a> <span class="k">for</span> <span class="nb">any</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">):</span>
|
|
</span><span id="any_to_exists-961"><a href="#any_to_exists-961"><span class="linenos">961</span></a> <span class="n">this</span> <span class="o">=</span> <span class="nb">any</span><span class="o">.</span><span class="n">this</span>
|
|
</span><span id="any_to_exists-962"><a href="#any_to_exists-962"><span class="linenos">962</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">):</span>
|
|
</span><span id="any_to_exists-963"><a href="#any_to_exists-963"><span class="linenos">963</span></a> <span class="k">continue</span>
|
|
</span><span id="any_to_exists-964"><a href="#any_to_exists-964"><span class="linenos">964</span></a>
|
|
</span><span id="any_to_exists-965"><a href="#any_to_exists-965"><span class="linenos">965</span></a> <span class="n">binop</span> <span class="o">=</span> <span class="nb">any</span><span class="o">.</span><span class="n">parent</span>
|
|
</span><span id="any_to_exists-966"><a href="#any_to_exists-966"><span class="linenos">966</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">binop</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">):</span>
|
|
</span><span id="any_to_exists-967"><a href="#any_to_exists-967"><span class="linenos">967</span></a> <span class="n">lambda_arg</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="s2">"x"</span><span class="p">)</span>
|
|
</span><span id="any_to_exists-968"><a href="#any_to_exists-968"><span class="linenos">968</span></a> <span class="nb">any</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">lambda_arg</span><span class="p">)</span>
|
|
</span><span id="any_to_exists-969"><a href="#any_to_exists-969"><span class="linenos">969</span></a> <span class="n">lambda_expr</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Lambda</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">binop</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">lambda_arg</span><span class="p">])</span>
|
|
</span><span id="any_to_exists-970"><a href="#any_to_exists-970"><span class="linenos">970</span></a> <span class="n">binop</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">this</span><span class="o">.</span><span class="n">unnest</span><span class="p">(),</span> <span class="n">expression</span><span class="o">=</span><span class="n">lambda_expr</span><span class="p">))</span>
|
|
</span><span id="any_to_exists-971"><a href="#any_to_exists-971"><span class="linenos">971</span></a>
|
|
</span><span id="any_to_exists-972"><a href="#any_to_exists-972"><span class="linenos">972</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Transform ANY operator to Spark's EXISTS</p>
|
|
|
|
<p>For example,
|
|
- Postgres: SELECT * FROM tbl WHERE 5 > ANY(tbl.col)
|
|
- Spark: SELECT * FROM tbl WHERE EXISTS(tbl.col, x -> x < 5)</p>
|
|
|
|
<p>Both ANY and EXISTS accept queries but currently only array expressions are supported for this
|
|
transformation</p>
|
|
</div>
|
|
|
|
|
|
</section>
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|
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if (!search) {
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return "<h3>Searching...</h3>"
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}
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window.scrollTo({top: 0, left: 0, behavior: 'auto'});
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const results = search(term);
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let html;
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if (results.length === 0) {
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html = `No search results for '${escapeHTML(term)}'.`
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html = `<h4>${results.length} search result${results.length > 1 ? "s" : ""} for '${escapeHTML(term)}'.</h4>`;
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for (let result of results.slice(0, 10)) {
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<a href="${url}" class="attr ${doc.kind}">${heading}</a>
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