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<h2>API Documentation</h2>
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<li>
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<a class="function" href="#qualify_columns">qualify_columns</a>
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</li>
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<a class="function" href="#validate_qualify_columns">validate_qualify_columns</a>
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<a class="function" href="#qualify_outputs">qualify_outputs</a>
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<a class="function" href="#quote_identifiers">quote_identifiers</a>
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<a class="pdoc-button git-button" href="https://github.com/tobymao/sqlglot/tree/main/sqlglot/optimizer/qualify_columns.py">Edit on GitHub</a>
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<h1 class="modulename">
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<a href="./../../sqlglot.html">sqlglot</a><wbr>.<a href="./../optimizer.html">optimizer</a><wbr>.qualify_columns </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">itertools</span>
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</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</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-5"><a href="#L-5"><span class="linenos"> 5</span></a>
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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</span><span class="w"> </span><span class="kn">import</span> <span class="n">alias</span><span class="p">,</span> <span class="n">exp</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.dialects.dialect</span><span class="w"> </span><span class="kn">import</span> <span class="n">Dialect</span><span class="p">,</span> <span class="n">DialectType</span>
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</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</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">OptimizeError</span>
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</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</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">seq_get</span><span class="p">,</span> <span class="n">SingleValuedMapping</span>
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</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a><span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.optimizer.annotate_types</span><span class="w"> </span><span class="kn">import</span> <span class="n">TypeAnnotator</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.optimizer.scope</span><span class="w"> </span><span class="kn">import</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">build_scope</span><span class="p">,</span> <span class="n">traverse_scope</span><span class="p">,</span> <span class="n">walk_in_scope</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.optimizer.simplify</span><span class="w"> </span><span class="kn">import</span> <span class="n">simplify_parens</span>
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</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a><span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.schema</span><span class="w"> </span><span class="kn">import</span> <span class="n">Schema</span><span class="p">,</span> <span class="n">ensure_schema</span>
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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">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-16"><a href="#L-16"><span class="linenos"> 16</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-17"><a href="#L-17"><span class="linenos"> 17</span></a>
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</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a>
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</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a><span class="k">def</span><span class="w"> </span><span class="nf">qualify_columns</span><span class="p">(</span>
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</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</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="L-21"><a href="#L-21"><span class="linenos"> 21</span></a> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span> <span class="o">|</span> <span class="n">Schema</span><span class="p">,</span>
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</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a> <span class="n">expand_alias_refs</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="L-23"><a href="#L-23"><span class="linenos"> 23</span></a> <span class="n">expand_stars</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="L-24"><a href="#L-24"><span class="linenos"> 24</span></a> <span class="n">infer_schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">bool</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
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</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a> <span class="n">allow_partial_qualification</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
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</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</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="L-27"><a href="#L-27"><span class="linenos"> 27</span></a><span class="w"> </span><span class="sd">"""</span>
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</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a><span class="sd"> Rewrite sqlglot AST to have fully qualified columns.</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="sd"> Example:</span>
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</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a><span class="sd"> >>> import sqlglot</span>
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</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a><span class="sd"> >>> schema = {"tbl": {"col": "INT"}}</span>
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</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT col FROM tbl")</span>
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</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a><span class="sd"> >>> qualify_columns(expression, schema).sql()</span>
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</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a><span class="sd"> 'SELECT tbl.col AS col FROM tbl'</span>
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</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a>
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</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a><span class="sd"> Args:</span>
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</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a><span class="sd"> expression: Expression to qualify.</span>
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</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a><span class="sd"> schema: Database schema.</span>
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</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a><span class="sd"> expand_alias_refs: Whether to expand references to aliases.</span>
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</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a><span class="sd"> expand_stars: Whether to expand star queries. This is a necessary step</span>
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</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a><span class="sd"> for most of the optimizer's rules to work; do not set to False unless you</span>
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</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a><span class="sd"> know what you're doing!</span>
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</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a><span class="sd"> infer_schema: Whether to infer the schema if missing.</span>
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</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a><span class="sd"> allow_partial_qualification: Whether to allow partial qualification.</span>
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</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a>
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</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a><span class="sd"> Returns:</span>
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</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a><span class="sd"> The qualified expression.</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="sd"> Notes:</span>
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</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a><span class="sd"> - Currently only handles a single PIVOT or UNPIVOT operator</span>
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</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a><span class="sd"> """</span>
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</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">ensure_schema</span><span class="p">(</span><span class="n">schema</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="n">annotator</span> <span class="o">=</span> <span class="n">TypeAnnotator</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span>
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</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">infer_schema</span> <span class="o">=</span> <span class="n">schema</span><span class="o">.</span><span class="n">empty</span> <span class="k">if</span> <span class="n">infer_schema</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">infer_schema</span>
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</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="n">dialect</span> <span class="o">=</span> <span class="n">Dialect</span><span class="o">.</span><span class="n">get_or_raise</span><span class="p">(</span><span class="n">schema</span><span class="o">.</span><span class="n">dialect</span><span class="p">)</span>
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</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="n">pseudocolumns</span> <span class="o">=</span> <span class="n">dialect</span><span class="o">.</span><span class="n">PSEUDOCOLUMNS</span>
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</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="n">bigquery</span> <span class="o">=</span> <span class="n">dialect</span> <span class="o">==</span> <span class="s2">"bigquery"</span>
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</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a>
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</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</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>
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</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="n">scope_expression</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span>
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</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="n">is_select</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope_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-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">if</span> <span class="n">is_select</span> <span class="ow">and</span> <span class="n">scope_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">"connect"</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="c1"># In Snowflake / Oracle queries that have a CONNECT BY clause, one can use the LEVEL</span>
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</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="c1"># pseudocolumn, which doesn't belong to a table, so we change it into an identifier</span>
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</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="n">scope_expression</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span>
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</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="k">lambda</span> <span class="n">n</span><span class="p">:</span> <span class="n">n</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">n</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="n">n</span><span class="o">.</span><span class="n">name</span> <span class="o">==</span> <span class="s2">"LEVEL"</span> <span class="k">else</span> <span class="n">n</span><span class="p">,</span>
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</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</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="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <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="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span>
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</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a>
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</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="n">resolver</span> <span class="o">=</span> <span class="n">Resolver</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">infer_schema</span><span class="o">=</span><span class="n">infer_schema</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="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><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="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">)</span>
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</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="n">using_column_tables</span> <span class="o">=</span> <span class="n">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span>
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</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a>
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</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="k">if</span> <span class="p">(</span><span class="n">schema</span><span class="o">.</span><span class="n">empty</span> <span class="ow">or</span> <span class="n">dialect</span><span class="o">.</span><span class="n">FORCE_EARLY_ALIAS_REF_EXPANSION</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expand_alias_refs</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">_expand_alias_refs</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">scope</span><span class="p">,</span>
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|
</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="n">resolver</span><span class="p">,</span>
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</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="n">dialect</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="n">expand_only_groupby</span><span class="o">=</span><span class="n">bigquery</span><span class="p">,</span>
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</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="p">)</span>
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</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a>
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</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="n">_convert_columns_to_dots</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span>
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</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="n">_qualify_columns</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">,</span> <span class="n">allow_partial_qualification</span><span class="o">=</span><span class="n">allow_partial_qualification</span><span class="p">)</span>
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</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a>
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</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">schema</span><span class="o">.</span><span class="n">empty</span> <span class="ow">and</span> <span class="n">expand_alias_refs</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="n">_expand_alias_refs</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">,</span> <span class="n">dialect</span><span class="p">)</span>
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</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a>
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</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="k">if</span> <span class="n">is_select</span><span class="p">:</span>
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</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="k">if</span> <span class="n">expand_stars</span><span class="p">:</span>
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</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="n">_expand_stars</span><span class="p">(</span>
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</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="n">scope</span><span class="p">,</span>
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</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="n">resolver</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">using_column_tables</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">pseudocolumns</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="n">annotator</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="p">)</span>
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</span><span id="L-101"><a href="#L-101"><span class="linenos"> 101</span></a> <span class="n">qualify_outputs</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span>
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</span><span id="L-102"><a href="#L-102"><span class="linenos"> 102</span></a>
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</span><span id="L-103"><a href="#L-103"><span class="linenos"> 103</span></a> <span class="n">_expand_group_by</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">dialect</span><span class="p">)</span>
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</span><span id="L-104"><a href="#L-104"><span class="linenos"> 104</span></a>
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</span><span id="L-105"><a href="#L-105"><span class="linenos"> 105</span></a> <span class="c1"># DISTINCT ON and ORDER BY follow the same rules (tested in DuckDB, Postgres, ClickHouse)</span>
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</span><span id="L-106"><a href="#L-106"><span class="linenos"> 106</span></a> <span class="c1"># https://www.postgresql.org/docs/current/sql-select.html#SQL-DISTINCT</span>
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</span><span id="L-107"><a href="#L-107"><span class="linenos"> 107</span></a> <span class="n">_expand_order_by_and_distinct_on</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span>
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</span><span id="L-108"><a href="#L-108"><span class="linenos"> 108</span></a>
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</span><span id="L-109"><a href="#L-109"><span class="linenos"> 109</span></a> <span class="k">if</span> <span class="n">bigquery</span><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">annotator</span><span class="o">.</span><span class="n">annotate_scope</span><span class="p">(</span><span class="n">scope</span><span class="p">)</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">return</span> <span class="n">expression</span>
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</span><span id="L-113"><a href="#L-113"><span class="linenos"> 113</span></a>
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</span><span id="L-114"><a href="#L-114"><span class="linenos"> 114</span></a>
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</span><span id="L-115"><a href="#L-115"><span class="linenos"> 115</span></a><span class="k">def</span><span class="w"> </span><span class="nf">validate_qualify_columns</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>
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</span><span id="L-116"><a href="#L-116"><span class="linenos"> 116</span></a><span class="w"> </span><span class="sd">"""Raise an `OptimizeError` if any columns aren't qualified"""</span>
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</span><span id="L-117"><a href="#L-117"><span class="linenos"> 117</span></a> <span class="n">all_unqualified_columns</span> <span class="o">=</span> <span class="p">[]</span>
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</span><span id="L-118"><a href="#L-118"><span class="linenos"> 118</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>
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</span><span id="L-119"><a href="#L-119"><span class="linenos"> 119</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</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">Select</span><span class="p">):</span>
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</span><span id="L-120"><a href="#L-120"><span class="linenos"> 120</span></a> <span class="n">unqualified_columns</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">unqualified_columns</span>
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</span><span id="L-121"><a href="#L-121"><span class="linenos"> 121</span></a>
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</span><span id="L-122"><a href="#L-122"><span class="linenos"> 122</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_correlated_subquery</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">:</span>
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</span><span id="L-123"><a href="#L-123"><span class="linenos"> 123</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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</span><span id="L-124"><a href="#L-124"><span class="linenos"> 124</span></a> <span class="n">for_table</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">" for table: '</span><span class="si">{</span><span class="n">column</span><span class="o">.</span><span class="n">table</span><span class="si">}</span><span class="s2">'"</span> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="k">else</span> <span class="s2">""</span>
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</span><span id="L-125"><a href="#L-125"><span class="linenos"> 125</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Column '</span><span class="si">{</span><span class="n">column</span><span class="si">}</span><span class="s2">' could not be resolved</span><span class="si">{</span><span class="n">for_table</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
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</span><span id="L-126"><a href="#L-126"><span class="linenos"> 126</span></a>
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</span><span id="L-127"><a href="#L-127"><span class="linenos"> 127</span></a> <span class="k">if</span> <span class="n">unqualified_columns</span> <span class="ow">and</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span> <span class="ow">and</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">unpivot</span><span class="p">:</span>
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</span><span id="L-128"><a href="#L-128"><span class="linenos"> 128</span></a> <span class="c1"># New columns produced by the UNPIVOT can't be qualified, but there may be columns</span>
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</span><span id="L-129"><a href="#L-129"><span class="linenos"> 129</span></a> <span class="c1"># under the UNPIVOT's IN clause that can and should be qualified. We recompute</span>
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</span><span id="L-130"><a href="#L-130"><span class="linenos"> 130</span></a> <span class="c1"># this list here to ensure those in the former category will be excluded.</span>
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</span><span id="L-131"><a href="#L-131"><span class="linenos"> 131</span></a> <span class="n">unpivot_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">_unpivot_columns</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]))</span>
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</span><span id="L-132"><a href="#L-132"><span class="linenos"> 132</span></a> <span class="n">unqualified_columns</span> <span class="o">=</span> <span class="p">[</span><span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">unqualified_columns</span> <span class="k">if</span> <span class="n">c</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">unpivot_columns</span><span class="p">]</span>
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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="n">all_unqualified_columns</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">unqualified_columns</span><span class="p">)</span>
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</span><span id="L-135"><a href="#L-135"><span class="linenos"> 135</span></a>
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</span><span id="L-136"><a href="#L-136"><span class="linenos"> 136</span></a> <span class="k">if</span> <span class="n">all_unqualified_columns</span><span class="p">:</span>
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</span><span id="L-137"><a href="#L-137"><span class="linenos"> 137</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous columns: </span><span class="si">{</span><span class="n">all_unqualified_columns</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
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|
</span><span id="L-138"><a href="#L-138"><span class="linenos"> 138</span></a>
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</span><span id="L-139"><a href="#L-139"><span class="linenos"> 139</span></a> <span class="k">return</span> <span class="n">expression</span>
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|
</span><span id="L-140"><a href="#L-140"><span class="linenos"> 140</span></a>
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</span><span id="L-141"><a href="#L-141"><span class="linenos"> 141</span></a>
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</span><span id="L-142"><a href="#L-142"><span class="linenos"> 142</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_unpivot_columns</span><span class="p">(</span><span class="n">unpivot</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Pivot</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Iterator</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-143"><a href="#L-143"><span class="linenos"> 143</span></a> <span class="n">name_columns</span> <span class="o">=</span> <span class="p">[</span>
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|
</span><span id="L-144"><a href="#L-144"><span class="linenos"> 144</span></a> <span class="n">field</span><span class="o">.</span><span class="n">this</span>
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|
</span><span id="L-145"><a href="#L-145"><span class="linenos"> 145</span></a> <span class="k">for</span> <span class="n">field</span> <span class="ow">in</span> <span class="n">unpivot</span><span class="o">.</span><span class="n">fields</span>
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</span><span id="L-146"><a href="#L-146"><span class="linenos"> 146</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">field</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">In</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">field</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">Column</span><span class="p">)</span>
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</span><span id="L-147"><a href="#L-147"><span class="linenos"> 147</span></a> <span class="p">]</span>
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</span><span id="L-148"><a href="#L-148"><span class="linenos"> 148</span></a> <span class="n">value_columns</span> <span class="o">=</span> <span class="p">(</span><span class="n">c</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">unpivot</span><span class="o">.</span><span class="n">expressions</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">e</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-149"><a href="#L-149"><span class="linenos"> 149</span></a>
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</span><span id="L-150"><a href="#L-150"><span class="linenos"> 150</span></a> <span class="k">return</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">name_columns</span><span class="p">,</span> <span class="n">value_columns</span><span class="p">)</span>
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|
</span><span id="L-151"><a href="#L-151"><span class="linenos"> 151</span></a>
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|
</span><span id="L-152"><a href="#L-152"><span class="linenos"> 152</span></a>
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</span><span id="L-153"><a href="#L-153"><span class="linenos"> 153</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_pop_table_column_aliases</span><span class="p">(</span><span class="n">derived_tables</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">CTE</span> <span class="o">|</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">])</span> <span class="o">-></span> <span class="kc">None</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="w"> </span><span class="sd">"""</span>
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|
</span><span id="L-155"><a href="#L-155"><span class="linenos"> 155</span></a><span class="sd"> Remove table column aliases.</span>
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</span><span id="L-156"><a href="#L-156"><span class="linenos"> 156</span></a>
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|
</span><span id="L-157"><a href="#L-157"><span class="linenos"> 157</span></a><span class="sd"> For example, `col1` and `col2` will be dropped in SELECT ... FROM (SELECT ...) AS foo(col1, col2)</span>
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|
</span><span id="L-158"><a href="#L-158"><span class="linenos"> 158</span></a><span class="sd"> """</span>
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|
</span><span id="L-159"><a href="#L-159"><span class="linenos"> 159</span></a> <span class="k">for</span> <span class="n">derived_table</span> <span class="ow">in</span> <span class="n">derived_tables</span><span class="p">:</span>
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</span><span id="L-160"><a href="#L-160"><span class="linenos"> 160</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">derived_table</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">With</span><span class="p">)</span> <span class="ow">and</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span>
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|
</span><span id="L-161"><a href="#L-161"><span class="linenos"> 161</span></a> <span class="k">continue</span>
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|
</span><span id="L-162"><a href="#L-162"><span class="linenos"> 162</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">derived_table</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-163"><a href="#L-163"><span class="linenos"> 163</span></a> <span class="k">if</span> <span class="n">table_alias</span><span class="p">:</span>
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</span><span id="L-164"><a href="#L-164"><span class="linenos"> 164</span></a> <span class="n">table_alias</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">"columns"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</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">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">:</span> <span class="n">Resolver</span><span class="p">)</span> <span class="o">-></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">t</span><span class="o">.</span><span class="n">Any</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="n">columns</span> <span class="o">=</span> <span class="p">{}</span>
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</span><span id="L-169"><a href="#L-169"><span class="linenos"> 169</span></a>
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</span><span id="L-170"><a href="#L-170"><span class="linenos"> 170</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_update_source_columns</span><span class="p">(</span><span class="n">source_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
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</span><span id="L-171"><a href="#L-171"><span class="linenos"> 171</span></a> <span class="k">for</span> <span class="n">column_name</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">source_name</span><span class="p">):</span>
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</span><span id="L-172"><a href="#L-172"><span class="linenos"> 172</span></a> <span class="k">if</span> <span class="n">column_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span>
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</span><span id="L-173"><a href="#L-173"><span class="linenos"> 173</span></a> <span class="n">columns</span><span class="p">[</span><span class="n">column_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">source_name</span>
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</span><span id="L-174"><a href="#L-174"><span class="linenos"> 174</span></a>
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</span><span id="L-175"><a href="#L-175"><span class="linenos"> 175</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">scope</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">Join</span><span class="p">))</span>
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</span><span id="L-176"><a href="#L-176"><span class="linenos"> 176</span></a> <span class="n">names</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="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">}</span>
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</span><span id="L-177"><a href="#L-177"><span class="linenos"> 177</span></a> <span class="n">ordered</span> <span class="o">=</span> <span class="p">[</span><span class="n">key</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span> <span class="k">if</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">names</span><span class="p">]</span>
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</span><span id="L-178"><a href="#L-178"><span class="linenos"> 178</span></a>
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</span><span id="L-179"><a href="#L-179"><span class="linenos"> 179</span></a> <span class="k">if</span> <span class="n">names</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">ordered</span><span class="p">:</span>
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</span><span id="L-180"><a href="#L-180"><span class="linenos"> 180</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Joins </span><span class="si">{</span><span class="n">names</span><span class="si">}</span><span class="s2"> missing source table </span><span class="si">{</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
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</span><span id="L-181"><a href="#L-181"><span class="linenos"> 181</span></a>
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</span><span id="L-182"><a href="#L-182"><span class="linenos"> 182</span></a> <span class="c1"># Mapping of automatically joined column names to an ordered set of source names (dict).</span>
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</span><span id="L-183"><a href="#L-183"><span class="linenos"> 183</span></a> <span class="n">column_tables</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">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">t</span><span class="o">.</span><span class="n">Any</span><span class="p">]]</span> <span class="o">=</span> <span class="p">{}</span>
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</span><span id="L-184"><a href="#L-184"><span class="linenos"> 184</span></a>
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</span><span id="L-185"><a href="#L-185"><span class="linenos"> 185</span></a> <span class="k">for</span> <span class="n">source_name</span> <span class="ow">in</span> <span class="n">ordered</span><span class="p">:</span>
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</span><span id="L-186"><a href="#L-186"><span class="linenos"> 186</span></a> <span class="n">_update_source_columns</span><span class="p">(</span><span class="n">source_name</span><span class="p">)</span>
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</span><span id="L-187"><a href="#L-187"><span class="linenos"> 187</span></a>
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</span><span id="L-188"><a href="#L-188"><span class="linenos"> 188</span></a> <span class="k">for</span> <span class="n">i</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">joins</span><span class="p">):</span>
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</span><span id="L-189"><a href="#L-189"><span class="linenos"> 189</span></a> <span class="n">source_table</span> <span class="o">=</span> <span class="n">ordered</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-190"><a href="#L-190"><span class="linenos"> 190</span></a> <span class="k">if</span> <span class="n">source_table</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">_update_source_columns</span><span class="p">(</span><span class="n">source_table</span><span class="p">)</span>
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</span><span id="L-192"><a href="#L-192"><span class="linenos"> 192</span></a>
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</span><span id="L-193"><a href="#L-193"><span class="linenos"> 193</span></a> <span class="n">join_table</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span>
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</span><span id="L-194"><a href="#L-194"><span class="linenos"> 194</span></a> <span class="n">ordered</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join_table</span><span class="p">)</span>
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</span><span id="L-195"><a href="#L-195"><span class="linenos"> 195</span></a>
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</span><span id="L-196"><a href="#L-196"><span class="linenos"> 196</span></a> <span class="n">using</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">"using"</span><span class="p">)</span>
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</span><span id="L-197"><a href="#L-197"><span class="linenos"> 197</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">using</span><span class="p">:</span>
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</span><span id="L-198"><a href="#L-198"><span class="linenos"> 198</span></a> <span class="k">continue</span>
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</span><span id="L-199"><a href="#L-199"><span class="linenos"> 199</span></a>
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</span><span id="L-200"><a href="#L-200"><span class="linenos"> 200</span></a> <span class="n">join_columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">join_table</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="n">conditions</span> <span class="o">=</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="n">using_identifier_count</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">using</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">is_semi_or_anti_join</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">is_semi_or_anti_join</span>
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</span><span id="L-204"><a href="#L-204"><span class="linenos"> 204</span></a>
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</span><span id="L-205"><a href="#L-205"><span class="linenos"> 205</span></a> <span class="k">for</span> <span class="n">identifier</span> <span class="ow">in</span> <span class="n">using</span><span class="p">:</span>
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</span><span id="L-206"><a href="#L-206"><span class="linenos"> 206</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="n">identifier</span><span class="o">.</span><span class="n">name</span>
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</span><span id="L-207"><a href="#L-207"><span class="linenos"> 207</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">identifier</span><span class="p">)</span>
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</span><span id="L-208"><a href="#L-208"><span class="linenos"> 208</span></a>
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</span><span id="L-209"><a href="#L-209"><span class="linenos"> 209</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table</span> <span class="ow">or</span> <span class="n">identifier</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">join_columns</span><span class="p">:</span>
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</span><span id="L-210"><a href="#L-210"><span class="linenos"> 210</span></a> <span class="k">if</span> <span class="p">(</span><span class="n">columns</span> <span class="ow">and</span> <span class="s2">"*"</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">)</span> <span class="ow">and</span> <span class="n">join_columns</span><span class="p">:</span>
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</span><span id="L-211"><a href="#L-211"><span class="linenos"> 211</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Cannot automatically join: </span><span class="si">{</span><span class="n">identifier</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
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|
</span><span id="L-212"><a href="#L-212"><span class="linenos"> 212</span></a>
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</span><span id="L-213"><a href="#L-213"><span class="linenos"> 213</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">table</span> <span class="ow">or</span> <span class="n">source_table</span>
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</span><span id="L-214"><a href="#L-214"><span class="linenos"> 214</span></a>
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</span><span id="L-215"><a href="#L-215"><span class="linenos"> 215</span></a> <span class="k">if</span> <span class="n">i</span> <span class="o">==</span> <span class="mi">0</span> <span class="ow">or</span> <span class="n">using_identifier_count</span> <span class="o">==</span> <span class="mi">1</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="n">lhs</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</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">identifier</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</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="k">else</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="n">coalesce_columns</span> <span class="o">=</span> <span class="p">[</span>
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</span><span id="L-219"><a href="#L-219"><span class="linenos"> 219</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">t</span><span class="p">)</span>
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</span><span id="L-220"><a href="#L-220"><span class="linenos"> 220</span></a> <span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="n">ordered</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-221"><a href="#L-221"><span class="linenos"> 221</span></a> <span class="k">if</span> <span class="n">identifier</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">t</span><span class="p">)</span>
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</span><span id="L-222"><a href="#L-222"><span class="linenos"> 222</span></a> <span class="p">]</span>
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|
</span><span id="L-223"><a href="#L-223"><span class="linenos"> 223</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">coalesce_columns</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-224"><a href="#L-224"><span class="linenos"> 224</span></a> <span class="n">lhs</span> <span class="o">=</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="o">*</span><span class="n">coalesce_columns</span><span class="p">)</span>
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</span><span id="L-225"><a href="#L-225"><span class="linenos"> 225</span></a> <span class="k">else</span><span class="p">:</span>
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</span><span id="L-226"><a href="#L-226"><span class="linenos"> 226</span></a> <span class="n">lhs</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">identifier</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">)</span>
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</span><span id="L-227"><a href="#L-227"><span class="linenos"> 227</span></a>
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</span><span id="L-228"><a href="#L-228"><span class="linenos"> 228</span></a> <span class="n">conditions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">lhs</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">identifier</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">join_table</span><span class="p">)))</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="c1"># Set all values in the dict to None, because we only care about the key ordering</span>
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</span><span id="L-231"><a href="#L-231"><span class="linenos"> 231</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">column_tables</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="p">{})</span>
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</span><span id="L-232"><a href="#L-232"><span class="linenos"> 232</span></a>
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</span><span id="L-233"><a href="#L-233"><span class="linenos"> 233</span></a> <span class="c1"># Do not update the dict if this was a SEMI/ANTI join in</span>
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</span><span id="L-234"><a href="#L-234"><span class="linenos"> 234</span></a> <span class="c1"># order to avoid generating COALESCE columns for this join pair</span>
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</span><span id="L-235"><a href="#L-235"><span class="linenos"> 235</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">is_semi_or_anti_join</span><span class="p">:</span>
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</span><span id="L-236"><a href="#L-236"><span class="linenos"> 236</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span>
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|
</span><span id="L-237"><a href="#L-237"><span class="linenos"> 237</span></a> <span class="n">tables</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>
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</span><span id="L-238"><a href="#L-238"><span class="linenos"> 238</span></a> <span class="k">if</span> <span class="n">join_table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">tables</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="n">tables</span><span class="p">[</span><span class="n">join_table</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>
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|
</span><span id="L-240"><a href="#L-240"><span class="linenos"> 240</span></a>
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</span><span id="L-241"><a href="#L-241"><span class="linenos"> 241</span></a> <span class="n">join</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">"using"</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">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="o">*</span><span class="n">conditions</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-243"><a href="#L-243"><span class="linenos"> 243</span></a>
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</span><span id="L-244"><a href="#L-244"><span class="linenos"> 244</span></a> <span class="k">if</span> <span class="n">column_tables</span><span class="p">:</span>
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</span><span id="L-245"><a href="#L-245"><span class="linenos"> 245</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>
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</span><span id="L-246"><a href="#L-246"><span class="linenos"> 246</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">column_tables</span><span class="p">:</span>
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</span><span id="L-247"><a href="#L-247"><span class="linenos"> 247</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">column_tables</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-248"><a href="#L-248"><span class="linenos"> 248</span></a> <span class="n">coalesce_args</span> <span class="o">=</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">column</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">)</span> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</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="n">replacement</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span> <span class="o">=</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="o">*</span><span class="n">coalesce_args</span><span class="p">)</span>
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|
</span><span id="L-250"><a href="#L-250"><span class="linenos"> 250</span></a>
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|
</span><span id="L-251"><a href="#L-251"><span class="linenos"> 251</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</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="L-252"><a href="#L-252"><span class="linenos"> 252</span></a> <span class="c1"># Ensure the USING column keeps its name if it's projected</span>
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|
</span><span id="L-253"><a href="#L-253"><span class="linenos"> 253</span></a> <span class="n">replacement</span> <span class="o">=</span> <span class="n">alias</span><span class="p">(</span><span class="n">replacement</span><span class="p">,</span> <span class="n">alias</span><span class="o">=</span><span class="n">column</span><span class="o">.</span><span class="n">name</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-254"><a href="#L-254"><span class="linenos"> 254</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</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">Struct</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="c1"># Ensure the USING column keeps its name if it's an anonymous STRUCT field</span>
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|
</span><span id="L-256"><a href="#L-256"><span class="linenos"> 256</span></a> <span class="n">replacement</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">PropertyEQ</span><span class="p">(</span>
|
|
</span><span id="L-257"><a href="#L-257"><span class="linenos"> 257</span></a> <span class="n">this</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">column</span><span class="o">.</span><span class="n">name</span><span class="p">),</span> <span class="n">expression</span><span class="o">=</span><span class="n">replacement</span>
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</span><span id="L-258"><a href="#L-258"><span class="linenos"> 258</span></a> <span class="p">)</span>
|
|
</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">scope</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">replacement</span><span class="p">)</span>
|
|
</span><span id="L-261"><a href="#L-261"><span class="linenos"> 261</span></a>
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</span><span id="L-262"><a href="#L-262"><span class="linenos"> 262</span></a> <span class="k">return</span> <span class="n">column_tables</span>
|
|
</span><span id="L-263"><a href="#L-263"><span class="linenos"> 263</span></a>
|
|
</span><span id="L-264"><a href="#L-264"><span class="linenos"> 264</span></a>
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</span><span id="L-265"><a href="#L-265"><span class="linenos"> 265</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_expand_alias_refs</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="n">scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">:</span> <span class="n">Resolver</span><span class="p">,</span> <span class="n">dialect</span><span class="p">:</span> <span class="n">Dialect</span><span class="p">,</span> <span class="n">expand_only_groupby</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span>
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</span><span id="L-267"><a href="#L-267"><span class="linenos"> 267</span></a><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
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</span><span id="L-268"><a href="#L-268"><span class="linenos"> 268</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="L-269"><a href="#L-269"><span class="linenos"> 269</span></a><span class="sd"> Expand references to aliases.</span>
|
|
</span><span id="L-270"><a href="#L-270"><span class="linenos"> 270</span></a><span class="sd"> Example:</span>
|
|
</span><span id="L-271"><a href="#L-271"><span class="linenos"> 271</span></a><span class="sd"> SELECT y.foo AS bar, bar * 2 AS baz FROM y</span>
|
|
</span><span id="L-272"><a href="#L-272"><span class="linenos"> 272</span></a><span class="sd"> => SELECT y.foo AS bar, y.foo * 2 AS baz FROM y</span>
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</span><span id="L-273"><a href="#L-273"><span class="linenos"> 273</span></a><span class="sd"> """</span>
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</span><span id="L-274"><a href="#L-274"><span class="linenos"> 274</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span>
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</span><span id="L-275"><a href="#L-275"><span class="linenos"> 275</span></a>
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</span><span id="L-276"><a href="#L-276"><span class="linenos"> 276</span></a> <span class="k">if</span> <span class="ow">not</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">or</span> <span class="n">dialect</span> <span class="o">==</span> <span class="s2">"oracle"</span><span class="p">:</span>
|
|
</span><span id="L-277"><a href="#L-277"><span class="linenos"> 277</span></a> <span class="k">return</span>
|
|
</span><span id="L-278"><a href="#L-278"><span class="linenos"> 278</span></a>
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|
</span><span id="L-279"><a href="#L-279"><span class="linenos"> 279</span></a> <span class="n">alias_to_expression</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">t</span><span class="o">.</span><span class="n">Tuple</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">int</span><span class="p">]]</span> <span class="o">=</span> <span class="p">{}</span>
|
|
</span><span id="L-280"><a href="#L-280"><span class="linenos"> 280</span></a> <span class="n">projections</span> <span class="o">=</span> <span class="p">{</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="k">for</span> <span class="n">s</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><span id="L-281"><a href="#L-281"><span class="linenos"> 281</span></a>
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</span><span id="L-282"><a href="#L-282"><span class="linenos"> 282</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">replace_columns</span><span class="p">(</span>
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</span><span id="L-283"><a href="#L-283"><span class="linenos"> 283</span></a> <span class="n">node</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</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">resolve_table</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> <span class="n">literal_index</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span>
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</span><span id="L-284"><a href="#L-284"><span class="linenos"> 284</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
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</span><span id="L-285"><a href="#L-285"><span class="linenos"> 285</span></a> <span class="n">is_group_by</span> <span class="o">=</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">Group</span><span class="p">)</span>
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|
</span><span id="L-286"><a href="#L-286"><span class="linenos"> 286</span></a> <span class="n">is_having</span> <span class="o">=</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">Having</span><span class="p">)</span>
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</span><span id="L-287"><a href="#L-287"><span class="linenos"> 287</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">node</span> <span class="ow">or</span> <span class="p">(</span><span class="n">expand_only_groupby</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">is_group_by</span><span class="p">):</span>
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</span><span id="L-288"><a href="#L-288"><span class="linenos"> 288</span></a> <span class="k">return</span>
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|
</span><span id="L-289"><a href="#L-289"><span class="linenos"> 289</span></a>
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</span><span id="L-290"><a href="#L-290"><span class="linenos"> 290</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">walk_in_scope</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">prune</span><span class="o">=</span><span class="k">lambda</span> <span class="n">node</span><span class="p">:</span> <span class="n">node</span><span class="o">.</span><span class="n">is_star</span><span class="p">):</span>
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|
</span><span id="L-291"><a href="#L-291"><span class="linenos"> 291</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</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-292"><a href="#L-292"><span class="linenos"> 292</span></a> <span class="k">continue</span>
|
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</span><span id="L-293"><a href="#L-293"><span class="linenos"> 293</span></a>
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</span><span id="L-294"><a href="#L-294"><span class="linenos"> 294</span></a> <span class="c1"># BigQuery's GROUP BY allows alias expansion only for standalone names, e.g:</span>
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|
</span><span id="L-295"><a href="#L-295"><span class="linenos"> 295</span></a> <span class="c1"># SELECT FUNC(col) AS col FROM t GROUP BY col --> Can be expanded</span>
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</span><span id="L-296"><a href="#L-296"><span class="linenos"> 296</span></a> <span class="c1"># SELECT FUNC(col) AS col FROM t GROUP BY FUNC(col) --> Shouldn't be expanded, will result to FUNC(FUNC(col))</span>
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|
</span><span id="L-297"><a href="#L-297"><span class="linenos"> 297</span></a> <span class="c1"># This not required for the HAVING clause as it can evaluate expressions using both the alias & the table columns</span>
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</span><span id="L-298"><a href="#L-298"><span class="linenos"> 298</span></a> <span class="k">if</span> <span class="n">expand_only_groupby</span> <span class="ow">and</span> <span class="n">is_group_by</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">parent</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">node</span><span class="p">:</span>
|
|
</span><span id="L-299"><a href="#L-299"><span class="linenos"> 299</span></a> <span class="k">continue</span>
|
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</span><span id="L-300"><a href="#L-300"><span class="linenos"> 300</span></a>
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|
</span><span id="L-301"><a href="#L-301"><span class="linenos"> 301</span></a> <span class="n">skip_replace</span> <span class="o">=</span> <span class="kc">False</span>
|
|
</span><span id="L-302"><a href="#L-302"><span class="linenos"> 302</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> <span class="k">if</span> <span class="n">resolve_table</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="k">else</span> <span class="kc">None</span>
|
|
</span><span id="L-303"><a href="#L-303"><span class="linenos"> 303</span></a> <span class="n">alias_expr</span><span class="p">,</span> <span class="n">i</span> <span class="o">=</span> <span class="n">alias_to_expression</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 class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="mi">1</span><span class="p">))</span>
|
|
</span><span id="L-304"><a href="#L-304"><span class="linenos"> 304</span></a>
|
|
</span><span id="L-305"><a href="#L-305"><span class="linenos"> 305</span></a> <span class="k">if</span> <span class="n">alias_expr</span><span class="p">:</span>
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|
</span><span id="L-306"><a href="#L-306"><span class="linenos"> 306</span></a> <span class="n">skip_replace</span> <span class="o">=</span> <span class="nb">bool</span><span class="p">(</span>
|
|
</span><span id="L-307"><a href="#L-307"><span class="linenos"> 307</span></a> <span class="n">alias_expr</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">AggFunc</span><span class="p">)</span>
|
|
</span><span id="L-308"><a href="#L-308"><span class="linenos"> 308</span></a> <span class="ow">and</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">AggFunc</span><span class="p">)</span>
|
|
</span><span id="L-309"><a href="#L-309"><span class="linenos"> 309</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</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">Window</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="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">)</span>
|
|
</span><span id="L-310"><a href="#L-310"><span class="linenos"> 310</span></a> <span class="p">)</span>
|
|
</span><span id="L-311"><a href="#L-311"><span class="linenos"> 311</span></a>
|
|
</span><span id="L-312"><a href="#L-312"><span class="linenos"> 312</span></a> <span class="c1"># BigQuery's having clause gets confused if an alias matches a source.</span>
|
|
</span><span id="L-313"><a href="#L-313"><span class="linenos"> 313</span></a> <span class="c1"># SELECT x.a, max(x.b) as x FROM x GROUP BY 1 HAVING x > 1;</span>
|
|
</span><span id="L-314"><a href="#L-314"><span class="linenos"> 314</span></a> <span class="c1"># If HAVING x is expanded to max(x.b), bigquery treats x as the new projection x instead of the table</span>
|
|
</span><span id="L-315"><a href="#L-315"><span class="linenos"> 315</span></a> <span class="k">if</span> <span class="n">is_having</span> <span class="ow">and</span> <span class="n">dialect</span> <span class="o">==</span> <span class="s2">"bigquery"</span><span class="p">:</span>
|
|
</span><span id="L-316"><a href="#L-316"><span class="linenos"> 316</span></a> <span class="n">skip_replace</span> <span class="o">=</span> <span class="n">skip_replace</span> <span class="ow">or</span> <span class="nb">any</span><span class="p">(</span>
|
|
</span><span id="L-317"><a href="#L-317"><span class="linenos"> 317</span></a> <span class="n">node</span><span class="o">.</span><span class="n">parts</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">projections</span>
|
|
</span><span id="L-318"><a href="#L-318"><span class="linenos"> 318</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">alias_expr</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-319"><a href="#L-319"><span class="linenos"> 319</span></a> <span class="p">)</span>
|
|
</span><span id="L-320"><a href="#L-320"><span class="linenos"> 320</span></a>
|
|
</span><span id="L-321"><a href="#L-321"><span class="linenos"> 321</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">and</span> <span class="p">(</span><span class="ow">not</span> <span class="n">alias_expr</span> <span class="ow">or</span> <span class="n">skip_replace</span><span class="p">):</span>
|
|
</span><span id="L-322"><a href="#L-322"><span class="linenos"> 322</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="n">table</span><span class="p">)</span>
|
|
</span><span id="L-323"><a href="#L-323"><span class="linenos"> 323</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="ow">and</span> <span class="n">alias_expr</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">skip_replace</span><span class="p">:</span>
|
|
</span><span id="L-324"><a href="#L-324"><span class="linenos"> 324</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">alias_expr</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">literal_index</span> <span class="ow">or</span> <span class="n">resolve_table</span><span class="p">):</span>
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|
</span><span id="L-325"><a href="#L-325"><span class="linenos"> 325</span></a> <span class="k">if</span> <span class="n">literal_index</span><span class="p">:</span>
|
|
</span><span id="L-326"><a href="#L-326"><span class="linenos"> 326</span></a> <span class="n">column</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">i</span><span class="p">))</span>
|
|
</span><span id="L-327"><a href="#L-327"><span class="linenos"> 327</span></a> <span class="k">else</span><span class="p">:</span>
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|
</span><span id="L-328"><a href="#L-328"><span class="linenos"> 328</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">column</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">paren</span><span class="p">(</span><span class="n">alias_expr</span><span class="p">))</span>
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|
</span><span id="L-329"><a href="#L-329"><span class="linenos"> 329</span></a> <span class="n">simplified</span> <span class="o">=</span> <span class="n">simplify_parens</span><span class="p">(</span><span class="n">column</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="n">simplified</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">column</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="n">column</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">simplified</span><span class="p">)</span>
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</span><span id="L-332"><a href="#L-332"><span class="linenos"> 332</span></a>
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</span><span id="L-333"><a href="#L-333"><span class="linenos"> 333</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">projection</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">selects</span><span class="p">):</span>
|
|
</span><span id="L-334"><a href="#L-334"><span class="linenos"> 334</span></a> <span class="n">replace_columns</span><span class="p">(</span><span class="n">projection</span><span class="p">)</span>
|
|
</span><span id="L-335"><a href="#L-335"><span class="linenos"> 335</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">projection</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-336"><a href="#L-336"><span class="linenos"> 336</span></a> <span class="n">alias_to_expression</span><span class="p">[</span><span class="n">projection</span><span class="o">.</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">projection</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">i</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span>
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|
</span><span id="L-337"><a href="#L-337"><span class="linenos"> 337</span></a>
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|
</span><span id="L-338"><a href="#L-338"><span class="linenos"> 338</span></a> <span class="n">parent_scope</span> <span class="o">=</span> <span class="n">scope</span>
|
|
</span><span id="L-339"><a href="#L-339"><span class="linenos"> 339</span></a> <span class="k">while</span> <span class="n">parent_scope</span><span class="o">.</span><span class="n">is_union</span><span class="p">:</span>
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|
</span><span id="L-340"><a href="#L-340"><span class="linenos"> 340</span></a> <span class="n">parent_scope</span> <span class="o">=</span> <span class="n">parent_scope</span><span class="o">.</span><span class="n">parent</span>
|
|
</span><span id="L-341"><a href="#L-341"><span class="linenos"> 341</span></a>
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|
</span><span id="L-342"><a href="#L-342"><span class="linenos"> 342</span></a> <span class="c1"># We shouldn't expand aliases if they match the recursive CTE's columns</span>
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</span><span id="L-343"><a href="#L-343"><span class="linenos"> 343</span></a> <span class="k">if</span> <span class="n">parent_scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span>
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|
</span><span id="L-344"><a href="#L-344"><span class="linenos"> 344</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="n">parent_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span>
|
|
</span><span id="L-345"><a href="#L-345"><span class="linenos"> 345</span></a> <span class="k">if</span> <span class="n">cte</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">With</span><span class="p">)</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span>
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|
</span><span id="L-346"><a href="#L-346"><span class="linenos"> 346</span></a> <span class="k">for</span> <span class="n">recursive_cte_column</span> <span class="ow">in</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="ow">or</span> <span class="n">cte</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span>
|
|
</span><span id="L-347"><a href="#L-347"><span class="linenos"> 347</span></a> <span class="n">alias_to_expression</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">recursive_cte_column</span><span class="o">.</span><span class="n">output_name</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
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|
</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="n">replace_columns</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">"where"</span><span class="p">))</span>
|
|
</span><span id="L-350"><a href="#L-350"><span class="linenos"> 350</span></a> <span class="n">replace_columns</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">"group"</span><span class="p">),</span> <span class="n">literal_index</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
|
|
</span><span id="L-351"><a href="#L-351"><span class="linenos"> 351</span></a> <span class="n">replace_columns</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">"having"</span><span class="p">),</span> <span class="n">resolve_table</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
|
|
</span><span id="L-352"><a href="#L-352"><span class="linenos"> 352</span></a> <span class="n">replace_columns</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">"qualify"</span><span class="p">),</span> <span class="n">resolve_table</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
|
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</span><span id="L-353"><a href="#L-353"><span class="linenos"> 353</span></a>
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|
</span><span id="L-354"><a href="#L-354"><span class="linenos"> 354</span></a> <span class="c1"># Snowflake allows alias expansion in the JOIN ... ON clause (and almost everywhere else)</span>
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</span><span id="L-355"><a href="#L-355"><span class="linenos"> 355</span></a> <span class="c1"># https://docs.snowflake.com/en/sql-reference/sql/select#usage-notes</span>
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</span><span id="L-356"><a href="#L-356"><span class="linenos"> 356</span></a> <span class="k">if</span> <span class="n">dialect</span> <span class="o">==</span> <span class="s2">"snowflake"</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="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-358"><a href="#L-358"><span class="linenos"> 358</span></a> <span class="n">replace_columns</span><span class="p">(</span><span class="n">join</span><span class="p">)</span>
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|
</span><span id="L-359"><a href="#L-359"><span class="linenos"> 359</span></a>
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|
</span><span id="L-360"><a href="#L-360"><span class="linenos"> 360</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span>
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</span><span id="L-361"><a href="#L-361"><span class="linenos"> 361</span></a>
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</span><span id="L-362"><a href="#L-362"><span class="linenos"> 362</span></a>
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</span><span id="L-363"><a href="#L-363"><span class="linenos"> 363</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_expand_group_by</span><span class="p">(</span><span class="n">scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">dialect</span><span class="p">:</span> <span class="n">DialectType</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
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|
</span><span id="L-364"><a href="#L-364"><span class="linenos"> 364</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span>
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|
</span><span id="L-365"><a href="#L-365"><span class="linenos"> 365</span></a> <span class="n">group</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">"group"</span><span class="p">)</span>
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</span><span id="L-366"><a href="#L-366"><span class="linenos"> 366</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">group</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">return</span>
|
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</span><span id="L-368"><a href="#L-368"><span class="linenos"> 368</span></a>
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</span><span id="L-369"><a href="#L-369"><span class="linenos"> 369</span></a> <span class="n">group</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">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">group</span><span class="o">.</span><span class="n">expressions</span><span class="p">,</span> <span class="n">dialect</span><span class="p">))</span>
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|
</span><span id="L-370"><a href="#L-370"><span class="linenos"> 370</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"group"</span><span class="p">,</span> <span class="n">group</span><span class="p">)</span>
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|
</span><span id="L-371"><a href="#L-371"><span class="linenos"> 371</span></a>
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</span><span id="L-372"><a href="#L-372"><span class="linenos"> 372</span></a>
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|
</span><span id="L-373"><a href="#L-373"><span class="linenos"> 373</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_expand_order_by_and_distinct_on</span><span class="p">(</span><span class="n">scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">:</span> <span class="n">Resolver</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
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</span><span id="L-374"><a href="#L-374"><span class="linenos"> 374</span></a> <span class="k">for</span> <span class="n">modifier_key</span> <span class="ow">in</span> <span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="s2">"distinct"</span><span class="p">):</span>
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|
</span><span id="L-375"><a href="#L-375"><span class="linenos"> 375</span></a> <span class="n">modifier</span> <span class="o">=</span> <span class="n">scope</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="n">modifier_key</span><span class="p">)</span>
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|
</span><span id="L-376"><a href="#L-376"><span class="linenos"> 376</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">modifier</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Distinct</span><span class="p">):</span>
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|
</span><span id="L-377"><a href="#L-377"><span class="linenos"> 377</span></a> <span class="n">modifier</span> <span class="o">=</span> <span class="n">modifier</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><span id="L-378"><a href="#L-378"><span class="linenos"> 378</span></a>
|
|
</span><span id="L-379"><a href="#L-379"><span class="linenos"> 379</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">modifier</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-380"><a href="#L-380"><span class="linenos"> 380</span></a> <span class="k">continue</span>
|
|
</span><span id="L-381"><a href="#L-381"><span class="linenos"> 381</span></a>
|
|
</span><span id="L-382"><a href="#L-382"><span class="linenos"> 382</span></a> <span class="n">modifier_expressions</span> <span class="o">=</span> <span class="n">modifier</span><span class="o">.</span><span class="n">expressions</span>
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|
</span><span id="L-383"><a href="#L-383"><span class="linenos"> 383</span></a> <span class="k">if</span> <span class="n">modifier_key</span> <span class="o">==</span> <span class="s2">"order"</span><span class="p">:</span>
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|
</span><span id="L-384"><a href="#L-384"><span class="linenos"> 384</span></a> <span class="n">modifier_expressions</span> <span class="o">=</span> <span class="p">[</span><span class="n">ordered</span><span class="o">.</span><span class="n">this</span> <span class="k">for</span> <span class="n">ordered</span> <span class="ow">in</span> <span class="n">modifier_expressions</span><span class="p">]</span>
|
|
</span><span id="L-385"><a href="#L-385"><span class="linenos"> 385</span></a>
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|
</span><span id="L-386"><a href="#L-386"><span class="linenos"> 386</span></a> <span class="k">for</span> <span class="n">original</span><span class="p">,</span> <span class="n">expanded</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span>
|
|
</span><span id="L-387"><a href="#L-387"><span class="linenos"> 387</span></a> <span class="n">modifier_expressions</span><span class="p">,</span>
|
|
</span><span id="L-388"><a href="#L-388"><span class="linenos"> 388</span></a> <span class="n">_expand_positional_references</span><span class="p">(</span>
|
|
</span><span id="L-389"><a href="#L-389"><span class="linenos"> 389</span></a> <span class="n">scope</span><span class="p">,</span> <span class="n">modifier_expressions</span><span class="p">,</span> <span class="n">resolver</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">dialect</span><span class="p">,</span> <span class="n">alias</span><span class="o">=</span><span class="kc">True</span>
|
|
</span><span id="L-390"><a href="#L-390"><span class="linenos"> 390</span></a> <span class="p">),</span>
|
|
</span><span id="L-391"><a href="#L-391"><span class="linenos"> 391</span></a> <span class="p">):</span>
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|
</span><span id="L-392"><a href="#L-392"><span class="linenos"> 392</span></a> <span class="k">for</span> <span class="n">agg</span> <span class="ow">in</span> <span class="n">original</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">AggFunc</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">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">agg</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-394"><a href="#L-394"><span class="linenos"> 394</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span><span class="p">:</span>
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</span><span id="L-395"><a href="#L-395"><span class="linenos"> 395</span></a> <span class="n">col</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="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">col</span><span class="o">.</span><span class="n">name</span><span class="p">))</span>
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</span><span id="L-396"><a href="#L-396"><span class="linenos"> 396</span></a>
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</span><span id="L-397"><a href="#L-397"><span class="linenos"> 397</span></a> <span class="n">original</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">expanded</span><span class="p">)</span>
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</span><span id="L-398"><a href="#L-398"><span class="linenos"> 398</span></a>
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</span><span id="L-399"><a href="#L-399"><span class="linenos"> 399</span></a> <span class="k">if</span> <span class="n">scope</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">"group"</span><span class="p">):</span>
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</span><span id="L-400"><a href="#L-400"><span class="linenos"> 400</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">{</span><span class="n">s</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">column</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">)</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</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-401"><a href="#L-401"><span class="linenos"> 401</span></a>
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</span><span id="L-402"><a href="#L-402"><span class="linenos"> 402</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">modifier_expressions</span><span class="p">:</span>
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</span><span id="L-403"><a href="#L-403"><span class="linenos"> 403</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span>
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</span><span id="L-404"><a href="#L-404"><span class="linenos"> 404</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">_select_by_pos</span><span class="p">(</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">alias</span><span class="p">)</span>
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</span><span id="L-405"><a href="#L-405"><span class="linenos"> 405</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">is_int</span>
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</span><span id="L-406"><a href="#L-406"><span class="linenos"> 406</span></a> <span class="k">else</span> <span class="n">selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression</span><span class="p">)</span>
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|
</span><span id="L-407"><a href="#L-407"><span class="linenos"> 407</span></a> <span class="p">)</span>
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|
</span><span id="L-408"><a href="#L-408"><span class="linenos"> 408</span></a>
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|
</span><span id="L-409"><a href="#L-409"><span class="linenos"> 409</span></a>
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</span><span id="L-410"><a href="#L-410"><span class="linenos"> 410</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_expand_positional_references</span><span class="p">(</span>
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</span><span id="L-411"><a href="#L-411"><span class="linenos"> 411</span></a> <span class="n">scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">expressions</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Iterable</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">dialect</span><span class="p">:</span> <span class="n">DialectType</span><span class="p">,</span> <span class="n">alias</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span>
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</span><span id="L-412"><a href="#L-412"><span class="linenos"> 412</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="L-413"><a href="#L-413"><span class="linenos"> 413</span></a> <span class="n">new_nodes</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-414"><a href="#L-414"><span class="linenos"> 414</span></a> <span class="n">ambiguous_projections</span> <span class="o">=</span> <span class="kc">None</span>
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</span><span id="L-415"><a href="#L-415"><span class="linenos"> 415</span></a>
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</span><span id="L-416"><a href="#L-416"><span class="linenos"> 416</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expressions</span><span class="p">:</span>
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</span><span id="L-417"><a href="#L-417"><span class="linenos"> 417</span></a> <span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">is_int</span><span class="p">:</span>
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</span><span id="L-418"><a href="#L-418"><span class="linenos"> 418</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">_select_by_pos</span><span class="p">(</span><span class="n">scope</span><span class="p">,</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">Literal</span><span class="p">,</span> <span class="n">node</span><span class="p">))</span>
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|
</span><span id="L-419"><a href="#L-419"><span class="linenos"> 419</span></a>
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|
</span><span id="L-420"><a href="#L-420"><span class="linenos"> 420</span></a> <span class="k">if</span> <span class="n">alias</span><span class="p">:</span>
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|
</span><span id="L-421"><a href="#L-421"><span class="linenos"> 421</span></a> <span class="n">new_nodes</span><span class="o">.</span><span class="n">append</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">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 class="o">.</span><span class="n">copy</span><span class="p">()))</span>
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|
</span><span id="L-422"><a href="#L-422"><span class="linenos"> 422</span></a> <span class="k">else</span><span class="p">:</span>
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|
</span><span id="L-423"><a href="#L-423"><span class="linenos"> 423</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span>
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|
</span><span id="L-424"><a href="#L-424"><span class="linenos"> 424</span></a>
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|
</span><span id="L-425"><a href="#L-425"><span class="linenos"> 425</span></a> <span class="k">if</span> <span class="n">dialect</span> <span class="o">==</span> <span class="s2">"bigquery"</span><span class="p">:</span>
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|
</span><span id="L-426"><a href="#L-426"><span class="linenos"> 426</span></a> <span class="k">if</span> <span class="n">ambiguous_projections</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
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|
</span><span id="L-427"><a href="#L-427"><span class="linenos"> 427</span></a> <span class="c1"># When a projection name is also a source name and it is referenced in the</span>
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</span><span id="L-428"><a href="#L-428"><span class="linenos"> 428</span></a> <span class="c1"># GROUP BY clause, BQ can't understand what the identifier corresponds to</span>
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</span><span id="L-429"><a href="#L-429"><span class="linenos"> 429</span></a> <span class="n">ambiguous_projections</span> <span class="o">=</span> <span class="p">{</span>
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</span><span id="L-430"><a href="#L-430"><span class="linenos"> 430</span></a> <span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span>
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</span><span id="L-431"><a href="#L-431"><span class="linenos"> 431</span></a> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span>
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</span><span id="L-432"><a href="#L-432"><span class="linenos"> 432</span></a> <span class="k">if</span> <span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span>
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</span><span id="L-433"><a href="#L-433"><span class="linenos"> 433</span></a> <span class="p">}</span>
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</span><span id="L-434"><a href="#L-434"><span class="linenos"> 434</span></a>
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</span><span id="L-435"><a href="#L-435"><span class="linenos"> 435</span></a> <span class="n">ambiguous</span> <span class="o">=</span> <span class="nb">any</span><span class="p">(</span>
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</span><span id="L-436"><a href="#L-436"><span class="linenos"> 436</span></a> <span class="n">column</span><span class="o">.</span><span class="n">parts</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">ambiguous_projections</span>
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</span><span id="L-437"><a href="#L-437"><span class="linenos"> 437</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">select</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-438"><a href="#L-438"><span class="linenos"> 438</span></a> <span class="p">)</span>
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</span><span id="L-439"><a href="#L-439"><span class="linenos"> 439</span></a> <span class="k">else</span><span class="p">:</span>
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</span><span id="L-440"><a href="#L-440"><span class="linenos"> 440</span></a> <span class="n">ambiguous</span> <span class="o">=</span> <span class="kc">False</span>
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</span><span id="L-441"><a href="#L-441"><span class="linenos"> 441</span></a>
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</span><span id="L-442"><a href="#L-442"><span class="linenos"> 442</span></a> <span class="k">if</span> <span class="p">(</span>
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</span><span id="L-443"><a href="#L-443"><span class="linenos"> 443</span></a> <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">CONSTANTS</span><span class="p">)</span>
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</span><span id="L-444"><a href="#L-444"><span class="linenos"> 444</span></a> <span class="ow">or</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 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-445"><a href="#L-445"><span class="linenos"> 445</span></a> <span class="ow">or</span> <span class="n">ambiguous</span>
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</span><span id="L-446"><a href="#L-446"><span class="linenos"> 446</span></a> <span class="p">):</span>
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</span><span id="L-447"><a href="#L-447"><span class="linenos"> 447</span></a> <span class="n">new_nodes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span>
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</span><span id="L-448"><a href="#L-448"><span class="linenos"> 448</span></a> <span class="k">else</span><span class="p">:</span>
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|
</span><span id="L-449"><a href="#L-449"><span class="linenos"> 449</span></a> <span class="n">new_nodes</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">copy</span><span class="p">())</span>
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</span><span id="L-450"><a href="#L-450"><span class="linenos"> 450</span></a> <span class="k">else</span><span class="p">:</span>
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</span><span id="L-451"><a href="#L-451"><span class="linenos"> 451</span></a> <span class="n">new_nodes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span>
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</span><span id="L-452"><a href="#L-452"><span class="linenos"> 452</span></a>
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</span><span id="L-453"><a href="#L-453"><span class="linenos"> 453</span></a> <span class="k">return</span> <span class="n">new_nodes</span>
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</span><span id="L-454"><a href="#L-454"><span class="linenos"> 454</span></a>
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</span><span id="L-455"><a href="#L-455"><span class="linenos"> 455</span></a>
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</span><span id="L-456"><a href="#L-456"><span class="linenos"> 456</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_select_by_pos</span><span class="p">(</span><span class="n">scope</span><span class="p">:</span> <span class="n">Scope</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">Literal</span><span class="p">)</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="L-457"><a href="#L-457"><span class="linenos"> 457</span></a> <span class="k">try</span><span class="p">:</span>
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</span><span id="L-458"><a href="#L-458"><span class="linenos"> 458</span></a> <span class="k">return</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="nb">int</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">assert_is</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-459"><a href="#L-459"><span class="linenos"> 459</span></a> <span class="k">except</span> <span class="ne">IndexError</span><span class="p">:</span>
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</span><span id="L-460"><a href="#L-460"><span class="linenos"> 460</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown output column: </span><span class="si">{</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
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</span><span id="L-461"><a href="#L-461"><span class="linenos"> 461</span></a>
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</span><span id="L-462"><a href="#L-462"><span class="linenos"> 462</span></a>
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</span><span id="L-463"><a href="#L-463"><span class="linenos"> 463</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_convert_columns_to_dots</span><span class="p">(</span><span class="n">scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">:</span> <span class="n">Resolver</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
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</span><span id="L-464"><a href="#L-464"><span class="linenos"> 464</span></a><span class="w"> </span><span class="sd">"""</span>
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|
</span><span id="L-465"><a href="#L-465"><span class="linenos"> 465</span></a><span class="sd"> Converts `Column` instances that represent struct field lookup into chained `Dots`.</span>
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</span><span id="L-466"><a href="#L-466"><span class="linenos"> 466</span></a>
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</span><span id="L-467"><a href="#L-467"><span class="linenos"> 467</span></a><span class="sd"> Struct field lookups look like columns (e.g. "struct"."field"), but they need to be</span>
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</span><span id="L-468"><a href="#L-468"><span class="linenos"> 468</span></a><span class="sd"> qualified separately and represented as Dot(Dot(...(<table>.<column>, field1), field2, ...)).</span>
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</span><span id="L-469"><a href="#L-469"><span class="linenos"> 469</span></a><span class="sd"> """</span>
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</span><span id="L-470"><a href="#L-470"><span class="linenos"> 470</span></a> <span class="n">converted</span> <span class="o">=</span> <span class="kc">False</span>
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</span><span id="L-471"><a href="#L-471"><span class="linenos"> 471</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">stars</span><span class="p">):</span>
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</span><span id="L-472"><a href="#L-472"><span class="linenos"> 472</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Dot</span><span class="p">):</span>
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</span><span id="L-473"><a href="#L-473"><span class="linenos"> 473</span></a> <span class="k">continue</span>
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|
</span><span id="L-474"><a href="#L-474"><span class="linenos"> 474</span></a>
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|
</span><span id="L-475"><a href="#L-475"><span class="linenos"> 475</span></a> <span class="n">column_table</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span> <span class="o">|</span> <span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">]</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span>
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|
</span><span id="L-476"><a href="#L-476"><span class="linenos"> 476</span></a> <span class="k">if</span> <span class="p">(</span>
|
|
</span><span id="L-477"><a href="#L-477"><span class="linenos"> 477</span></a> <span class="n">column_table</span>
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|
</span><span id="L-478"><a href="#L-478"><span class="linenos"> 478</span></a> <span class="ow">and</span> <span class="n">column_table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span>
|
|
</span><span id="L-479"><a href="#L-479"><span class="linenos"> 479</span></a> <span class="ow">and</span> <span class="p">(</span>
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|
</span><span id="L-480"><a href="#L-480"><span class="linenos"> 480</span></a> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span>
|
|
</span><span id="L-481"><a href="#L-481"><span class="linenos"> 481</span></a> <span class="ow">or</span> <span class="n">column_table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">sources</span>
|
|
</span><span id="L-482"><a href="#L-482"><span class="linenos"> 482</span></a> <span class="ow">or</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_correlated_subquery</span>
|
|
</span><span id="L-483"><a href="#L-483"><span class="linenos"> 483</span></a> <span class="p">)</span>
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</span><span id="L-484"><a href="#L-484"><span class="linenos"> 484</span></a> <span class="p">):</span>
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</span><span id="L-485"><a href="#L-485"><span class="linenos"> 485</span></a> <span class="n">root</span><span class="p">,</span> <span class="o">*</span><span class="n">parts</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">parts</span>
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|
</span><span id="L-486"><a href="#L-486"><span class="linenos"> 486</span></a>
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</span><span id="L-487"><a href="#L-487"><span class="linenos"> 487</span></a> <span class="k">if</span> <span class="n">root</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span>
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|
</span><span id="L-488"><a href="#L-488"><span class="linenos"> 488</span></a> <span class="c1"># The struct is already qualified, but we still need to change the AST</span>
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</span><span id="L-489"><a href="#L-489"><span class="linenos"> 489</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">root</span>
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</span><span id="L-490"><a href="#L-490"><span class="linenos"> 490</span></a> <span class="n">root</span><span class="p">,</span> <span class="o">*</span><span class="n">parts</span> <span class="o">=</span> <span class="n">parts</span>
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</span><span id="L-491"><a href="#L-491"><span class="linenos"> 491</span></a> <span class="k">else</span><span class="p">:</span>
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|
</span><span id="L-492"><a href="#L-492"><span class="linenos"> 492</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
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|
</span><span id="L-493"><a href="#L-493"><span class="linenos"> 493</span></a>
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</span><span id="L-494"><a href="#L-494"><span class="linenos"> 494</span></a> <span class="k">if</span> <span class="n">column_table</span><span class="p">:</span>
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|
</span><span id="L-495"><a href="#L-495"><span class="linenos"> 495</span></a> <span class="n">converted</span> <span class="o">=</span> <span class="kc">True</span>
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</span><span id="L-496"><a href="#L-496"><span class="linenos"> 496</span></a> <span class="n">column</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">Dot</span><span class="o">.</span><span class="n">build</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">root</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">column_table</span><span class="p">),</span> <span class="o">*</span><span class="n">parts</span><span class="p">]))</span>
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</span><span id="L-497"><a href="#L-497"><span class="linenos"> 497</span></a>
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|
</span><span id="L-498"><a href="#L-498"><span class="linenos"> 498</span></a> <span class="k">if</span> <span class="n">converted</span><span class="p">:</span>
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|
</span><span id="L-499"><a href="#L-499"><span class="linenos"> 499</span></a> <span class="c1"># We want to re-aggregate the converted columns, otherwise they'd be skipped in</span>
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</span><span id="L-500"><a href="#L-500"><span class="linenos"> 500</span></a> <span class="c1"># a `for column in scope.columns` iteration, even though they shouldn't be</span>
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|
</span><span id="L-501"><a href="#L-501"><span class="linenos"> 501</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span>
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|
</span><span id="L-502"><a href="#L-502"><span class="linenos"> 502</span></a>
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|
</span><span id="L-503"><a href="#L-503"><span class="linenos"> 503</span></a>
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</span><span id="L-504"><a href="#L-504"><span class="linenos"> 504</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_qualify_columns</span><span class="p">(</span><span class="n">scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">:</span> <span class="n">Resolver</span><span class="p">,</span> <span class="n">allow_partial_qualification</span><span class="p">:</span> <span class="nb">bool</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
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|
</span><span id="L-505"><a href="#L-505"><span class="linenos"> 505</span></a><span class="w"> </span><span class="sd">"""Disambiguate columns, ensuring each column specifies a source"""</span>
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|
</span><span id="L-506"><a href="#L-506"><span class="linenos"> 506</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>
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</span><span id="L-507"><a href="#L-507"><span class="linenos"> 507</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span>
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|
</span><span id="L-508"><a href="#L-508"><span class="linenos"> 508</span></a> <span class="n">column_name</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span>
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|
</span><span id="L-509"><a href="#L-509"><span class="linenos"> 509</span></a>
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|
</span><span id="L-510"><a href="#L-510"><span class="linenos"> 510</span></a> <span class="k">if</span> <span class="n">column_table</span> <span class="ow">and</span> <span class="n">column_table</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span>
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|
</span><span id="L-511"><a href="#L-511"><span class="linenos"> 511</span></a> <span class="n">source_columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">column_table</span><span class="p">)</span>
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|
</span><span id="L-512"><a href="#L-512"><span class="linenos"> 512</span></a> <span class="k">if</span> <span class="p">(</span>
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|
</span><span id="L-513"><a href="#L-513"><span class="linenos"> 513</span></a> <span class="ow">not</span> <span class="n">allow_partial_qualification</span>
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|
</span><span id="L-514"><a href="#L-514"><span class="linenos"> 514</span></a> <span class="ow">and</span> <span class="n">source_columns</span>
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|
</span><span id="L-515"><a href="#L-515"><span class="linenos"> 515</span></a> <span class="ow">and</span> <span class="n">column_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">source_columns</span>
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|
</span><span id="L-516"><a href="#L-516"><span class="linenos"> 516</span></a> <span class="ow">and</span> <span class="s2">"*"</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">source_columns</span>
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|
</span><span id="L-517"><a href="#L-517"><span class="linenos"> 517</span></a> <span class="p">):</span>
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|
</span><span id="L-518"><a href="#L-518"><span class="linenos"> 518</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown column: </span><span class="si">{</span><span class="n">column_name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
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|
</span><span id="L-519"><a href="#L-519"><span class="linenos"> 519</span></a>
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|
</span><span id="L-520"><a href="#L-520"><span class="linenos"> 520</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column_table</span><span class="p">:</span>
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|
</span><span id="L-521"><a href="#L-521"><span class="linenos"> 521</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span> <span class="ow">and</span> <span class="ow">not</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">Pivot</span><span class="p">):</span>
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|
</span><span id="L-522"><a href="#L-522"><span class="linenos"> 522</span></a> <span class="c1"># If the column is under the Pivot expression, we need to qualify it</span>
|
|
</span><span id="L-523"><a href="#L-523"><span class="linenos"> 523</span></a> <span class="c1"># using the name of the pivoted source instead of the pivot's alias</span>
|
|
</span><span id="L-524"><a href="#L-524"><span class="linenos"> 524</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="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">alias</span><span class="p">))</span>
|
|
</span><span id="L-525"><a href="#L-525"><span class="linenos"> 525</span></a> <span class="k">continue</span>
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|
</span><span id="L-526"><a href="#L-526"><span class="linenos"> 526</span></a>
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|
</span><span id="L-527"><a href="#L-527"><span class="linenos"> 527</span></a> <span class="c1"># column_table can be a '' because bigquery unnest has no table alias</span>
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|
</span><span id="L-528"><a href="#L-528"><span class="linenos"> 528</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span>
|
|
</span><span id="L-529"><a href="#L-529"><span class="linenos"> 529</span></a> <span class="k">if</span> <span class="n">column_table</span><span class="p">:</span>
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|
</span><span id="L-530"><a href="#L-530"><span class="linenos"> 530</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="n">column_table</span><span class="p">)</span>
|
|
</span><span id="L-531"><a href="#L-531"><span class="linenos"> 531</span></a>
|
|
</span><span id="L-532"><a href="#L-532"><span class="linenos"> 532</span></a> <span class="k">for</span> <span class="n">pivot</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">:</span>
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|
</span><span id="L-533"><a href="#L-533"><span class="linenos"> 533</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">pivot</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-534"><a href="#L-534"><span class="linenos"> 534</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">all_columns</span><span class="p">:</span>
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|
</span><span id="L-535"><a href="#L-535"><span class="linenos"> 535</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</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="L-536"><a href="#L-536"><span class="linenos"> 536</span></a> <span class="k">if</span> <span class="n">column_table</span><span class="p">:</span>
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|
</span><span id="L-537"><a href="#L-537"><span class="linenos"> 537</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="n">column_table</span><span class="p">)</span>
|
|
</span><span id="L-538"><a href="#L-538"><span class="linenos"> 538</span></a>
|
|
</span><span id="L-539"><a href="#L-539"><span class="linenos"> 539</span></a>
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|
</span><span id="L-540"><a href="#L-540"><span class="linenos"> 540</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_expand_struct_stars</span><span class="p">(</span>
|
|
</span><span id="L-541"><a href="#L-541"><span class="linenos"> 541</span></a> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Dot</span><span class="p">,</span>
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</span><span id="L-542"><a href="#L-542"><span class="linenos"> 542</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">Alias</span><span class="p">]:</span>
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|
</span><span id="L-543"><a href="#L-543"><span class="linenos"> 543</span></a><span class="w"> </span><span class="sd">"""[BigQuery] Expand/Flatten foo.bar.* where bar is a struct column"""</span>
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|
</span><span id="L-544"><a href="#L-544"><span class="linenos"> 544</span></a>
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|
</span><span id="L-545"><a href="#L-545"><span class="linenos"> 545</span></a> <span class="n">dot_column</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">Column</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">Column</span><span class="p">))</span>
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|
</span><span id="L-546"><a href="#L-546"><span class="linenos"> 546</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">dot_column</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">STRUCT</span><span class="p">):</span>
|
|
</span><span id="L-547"><a href="#L-547"><span class="linenos"> 547</span></a> <span class="k">return</span> <span class="p">[]</span>
|
|
</span><span id="L-548"><a href="#L-548"><span class="linenos"> 548</span></a>
|
|
</span><span id="L-549"><a href="#L-549"><span class="linenos"> 549</span></a> <span class="c1"># All nested struct values are ColumnDefs, so normalize the first exp.Column in one</span>
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|
</span><span id="L-550"><a href="#L-550"><span class="linenos"> 550</span></a> <span class="n">dot_column</span> <span class="o">=</span> <span class="n">dot_column</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
|
|
</span><span id="L-551"><a href="#L-551"><span class="linenos"> 551</span></a> <span class="n">starting_struct</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">ColumnDef</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">dot_column</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">kind</span><span class="o">=</span><span class="n">dot_column</span><span class="o">.</span><span class="n">type</span><span class="p">)</span>
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|
</span><span id="L-552"><a href="#L-552"><span class="linenos"> 552</span></a>
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|
</span><span id="L-553"><a href="#L-553"><span class="linenos"> 553</span></a> <span class="c1"># First part is the table name and last part is the star so they can be dropped</span>
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|
</span><span id="L-554"><a href="#L-554"><span class="linenos"> 554</span></a> <span class="n">dot_parts</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">parts</span><span class="p">[</span><span class="mi">1</span><span class="p">:</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span>
|
|
</span><span id="L-555"><a href="#L-555"><span class="linenos"> 555</span></a>
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|
</span><span id="L-556"><a href="#L-556"><span class="linenos"> 556</span></a> <span class="c1"># If we're expanding a nested struct eg. t.c.f1.f2.* find the last struct (f2 in this case)</span>
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|
</span><span id="L-557"><a href="#L-557"><span class="linenos"> 557</span></a> <span class="k">for</span> <span class="n">part</span> <span class="ow">in</span> <span class="n">dot_parts</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span>
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|
</span><span id="L-558"><a href="#L-558"><span class="linenos"> 558</span></a> <span class="k">for</span> <span class="n">field</span> <span class="ow">in</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">DataType</span><span class="p">,</span> <span class="n">starting_struct</span><span class="o">.</span><span class="n">kind</span><span class="p">)</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span>
|
|
</span><span id="L-559"><a href="#L-559"><span class="linenos"> 559</span></a> <span class="c1"># Unable to expand star unless all fields are named</span>
|
|
</span><span id="L-560"><a href="#L-560"><span class="linenos"> 560</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">field</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">Identifier</span><span class="p">):</span>
|
|
</span><span id="L-561"><a href="#L-561"><span class="linenos"> 561</span></a> <span class="k">return</span> <span class="p">[]</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">if</span> <span class="n">field</span><span class="o">.</span><span class="n">name</span> <span class="o">==</span> <span class="n">part</span><span class="o">.</span><span class="n">name</span> <span class="ow">and</span> <span class="n">field</span><span class="o">.</span><span class="n">kind</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">STRUCT</span><span class="p">):</span>
|
|
</span><span id="L-564"><a href="#L-564"><span class="linenos"> 564</span></a> <span class="n">starting_struct</span> <span class="o">=</span> <span class="n">field</span>
|
|
</span><span id="L-565"><a href="#L-565"><span class="linenos"> 565</span></a> <span class="k">break</span>
|
|
</span><span id="L-566"><a href="#L-566"><span class="linenos"> 566</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-567"><a href="#L-567"><span class="linenos"> 567</span></a> <span class="c1"># There is no matching field in the struct</span>
|
|
</span><span id="L-568"><a href="#L-568"><span class="linenos"> 568</span></a> <span class="k">return</span> <span class="p">[]</span>
|
|
</span><span id="L-569"><a href="#L-569"><span class="linenos"> 569</span></a>
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|
</span><span id="L-570"><a href="#L-570"><span class="linenos"> 570</span></a> <span class="n">taken_names</span> <span class="o">=</span> <span class="nb">set</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="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span>
|
|
</span><span id="L-572"><a href="#L-572"><span class="linenos"> 572</span></a>
|
|
</span><span id="L-573"><a href="#L-573"><span class="linenos"> 573</span></a> <span class="k">for</span> <span class="n">field</span> <span class="ow">in</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">DataType</span><span class="p">,</span> <span class="n">starting_struct</span><span class="o">.</span><span class="n">kind</span><span class="p">)</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span>
|
|
</span><span id="L-574"><a href="#L-574"><span class="linenos"> 574</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">field</span><span class="o">.</span><span class="n">name</span>
|
|
</span><span id="L-575"><a href="#L-575"><span class="linenos"> 575</span></a>
|
|
</span><span id="L-576"><a href="#L-576"><span class="linenos"> 576</span></a> <span class="c1"># Ambiguous or anonymous fields can't be expanded</span>
|
|
</span><span id="L-577"><a href="#L-577"><span class="linenos"> 577</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">taken_names</span> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">field</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">Identifier</span><span class="p">):</span>
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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="p">[]</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> <span class="n">taken_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="L-581"><a href="#L-581"><span class="linenos"> 581</span></a>
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|
</span><span id="L-582"><a href="#L-582"><span class="linenos"> 582</span></a> <span class="n">this</span> <span class="o">=</span> <span class="n">field</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
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</span><span id="L-583"><a href="#L-583"><span class="linenos"> 583</span></a> <span class="n">root</span><span class="p">,</span> <span class="o">*</span><span class="n">parts</span> <span class="o">=</span> <span class="p">[</span><span class="n">part</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">for</span> <span class="n">part</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">dot_parts</span><span class="p">,</span> <span class="p">[</span><span class="n">this</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="n">new_column</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-585"><a href="#L-585"><span class="linenos"> 585</span></a> <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">Identifier</span><span class="p">,</span> <span class="n">root</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="n">table</span><span class="o">=</span><span class="n">dot_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">"table"</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="n">fields</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">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">Identifier</span><span class="p">],</span> <span class="n">parts</span><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="p">)</span>
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|
</span><span id="L-589"><a href="#L-589"><span class="linenos"> 589</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">alias</span><span class="p">(</span><span class="n">new_column</span><span class="p">,</span> <span class="n">this</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-590"><a href="#L-590"><span class="linenos"> 590</span></a>
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|
</span><span id="L-591"><a href="#L-591"><span class="linenos"> 591</span></a> <span class="k">return</span> <span class="n">new_selections</span>
|
|
</span><span id="L-592"><a href="#L-592"><span class="linenos"> 592</span></a>
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|
</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><span class="k">def</span><span class="w"> </span><span class="nf">_expand_stars</span><span class="p">(</span>
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|
</span><span id="L-595"><a href="#L-595"><span class="linenos"> 595</span></a> <span class="n">scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span>
|
|
</span><span id="L-596"><a href="#L-596"><span class="linenos"> 596</span></a> <span class="n">resolver</span><span class="p">:</span> <span class="n">Resolver</span><span class="p">,</span>
|
|
</span><span id="L-597"><a href="#L-597"><span class="linenos"> 597</span></a> <span class="n">using_column_tables</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">t</span><span class="o">.</span><span class="n">Any</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">pseudocolumns</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>
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|
</span><span id="L-599"><a href="#L-599"><span class="linenos"> 599</span></a> <span class="n">annotator</span><span class="p">:</span> <span class="n">TypeAnnotator</span><span class="p">,</span>
|
|
</span><span id="L-600"><a href="#L-600"><span class="linenos"> 600</span></a><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
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|
</span><span id="L-601"><a href="#L-601"><span class="linenos"> 601</span></a><span class="w"> </span><span class="sd">"""Expand stars to lists of column selections"""</span>
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</span><span id="L-602"><a href="#L-602"><span class="linenos"> 602</span></a>
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</span><span id="L-603"><a href="#L-603"><span class="linenos"> 603</span></a> <span class="n">new_selections</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-604"><a href="#L-604"><span class="linenos"> 604</span></a> <span class="n">except_columns</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">int</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="o">=</span> <span class="p">{}</span>
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|
</span><span id="L-605"><a href="#L-605"><span class="linenos"> 605</span></a> <span class="n">replace_columns</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">int</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">Alias</span><span class="p">]]</span> <span class="o">=</span> <span class="p">{}</span>
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|
</span><span id="L-606"><a href="#L-606"><span class="linenos"> 606</span></a> <span class="n">rename_columns</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">int</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="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="p">{}</span>
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|
</span><span id="L-607"><a href="#L-607"><span class="linenos"> 607</span></a>
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</span><span id="L-608"><a href="#L-608"><span class="linenos"> 608</span></a> <span class="n">coalesced_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
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|
</span><span id="L-609"><a href="#L-609"><span class="linenos"> 609</span></a> <span class="n">dialect</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">dialect</span>
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|
</span><span id="L-610"><a href="#L-610"><span class="linenos"> 610</span></a>
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</span><span id="L-611"><a href="#L-611"><span class="linenos"> 611</span></a> <span class="n">pivot_output_columns</span> <span class="o">=</span> <span class="kc">None</span>
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</span><span id="L-612"><a href="#L-612"><span class="linenos"> 612</span></a> <span class="n">pivot_exclude_columns</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="o">=</span> <span class="nb">set</span><span class="p">()</span>
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|
</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="n">pivot</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">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Pivot</span><span class="p">],</span> <span class="n">seq_get</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">,</span> <span class="mi">0</span><span class="p">))</span>
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|
</span><span id="L-615"><a href="#L-615"><span class="linenos"> 615</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">pivot</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Pivot</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">pivot</span><span class="o">.</span><span class="n">alias_column_names</span><span class="p">:</span>
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|
</span><span id="L-616"><a href="#L-616"><span class="linenos"> 616</span></a> <span class="k">if</span> <span class="n">pivot</span><span class="o">.</span><span class="n">unpivot</span><span class="p">:</span>
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|
</span><span id="L-617"><a href="#L-617"><span class="linenos"> 617</span></a> <span class="n">pivot_output_columns</span> <span class="o">=</span> <span class="p">[</span><span class="n">c</span><span class="o">.</span><span class="n">output_name</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">_unpivot_columns</span><span class="p">(</span><span class="n">pivot</span><span class="p">)]</span>
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|
</span><span id="L-618"><a href="#L-618"><span class="linenos"> 618</span></a>
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|
</span><span id="L-619"><a href="#L-619"><span class="linenos"> 619</span></a> <span class="k">for</span> <span class="n">field</span> <span class="ow">in</span> <span class="n">pivot</span><span class="o">.</span><span class="n">fields</span><span class="p">:</span>
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</span><span id="L-620"><a href="#L-620"><span class="linenos"> 620</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">field</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">In</span><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">pivot_exclude_columns</span><span class="o">.</span><span class="n">update</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 class="n">c</span><span class="o">.</span><span class="n">output_name</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">field</span><span class="o">.</span><span class="n">expressions</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">e</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-623"><a href="#L-623"><span class="linenos"> 623</span></a> <span class="p">)</span>
|
|
</span><span id="L-624"><a href="#L-624"><span class="linenos"> 624</span></a>
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|
</span><span id="L-625"><a href="#L-625"><span class="linenos"> 625</span></a> <span class="k">else</span><span class="p">:</span>
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|
</span><span id="L-626"><a href="#L-626"><span class="linenos"> 626</span></a> <span class="n">pivot_exclude_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">c</span><span class="o">.</span><span class="n">output_name</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">pivot</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-627"><a href="#L-627"><span class="linenos"> 627</span></a>
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|
</span><span id="L-628"><a href="#L-628"><span class="linenos"> 628</span></a> <span class="n">pivot_output_columns</span> <span class="o">=</span> <span class="p">[</span><span class="n">c</span><span class="o">.</span><span class="n">output_name</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">pivot</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">"columns"</span><span class="p">,</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">if</span> <span class="ow">not</span> <span class="n">pivot_output_columns</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">pivot_output_columns</span> <span class="o">=</span> <span class="p">[</span><span class="n">c</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">pivot</span><span class="o">.</span><span class="n">expressions</span><span class="p">]</span>
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</span><span id="L-631"><a href="#L-631"><span class="linenos"> 631</span></a>
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</span><span id="L-632"><a href="#L-632"><span class="linenos"> 632</span></a> <span class="n">is_bigquery</span> <span class="o">=</span> <span class="n">dialect</span> <span class="o">==</span> <span class="s2">"bigquery"</span>
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</span><span id="L-633"><a href="#L-633"><span class="linenos"> 633</span></a> <span class="k">if</span> <span class="n">is_bigquery</span> <span class="ow">and</span> <span class="nb">any</span><span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">col</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Dot</span><span class="p">)</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">stars</span><span class="p">):</span>
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</span><span id="L-634"><a href="#L-634"><span class="linenos"> 634</span></a> <span class="c1"># Found struct expansion, annotate scope ahead of time</span>
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|
</span><span id="L-635"><a href="#L-635"><span class="linenos"> 635</span></a> <span class="n">annotator</span><span class="o">.</span><span class="n">annotate_scope</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span>
|
|
</span><span id="L-636"><a href="#L-636"><span class="linenos"> 636</span></a>
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|
</span><span id="L-637"><a href="#L-637"><span class="linenos"> 637</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</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-638"><a href="#L-638"><span class="linenos"> 638</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="p">[]</span>
|
|
</span><span id="L-639"><a href="#L-639"><span class="linenos"> 639</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">Star</span><span class="p">):</span>
|
|
</span><span id="L-640"><a href="#L-640"><span class="linenos"> 640</span></a> <span class="n">tables</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span>
|
|
</span><span id="L-641"><a href="#L-641"><span class="linenos"> 641</span></a> <span class="n">_add_except_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">except_columns</span><span class="p">)</span>
|
|
</span><span id="L-642"><a href="#L-642"><span class="linenos"> 642</span></a> <span class="n">_add_replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">replace_columns</span><span class="p">)</span>
|
|
</span><span id="L-643"><a href="#L-643"><span class="linenos"> 643</span></a> <span class="n">_add_rename_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">rename_columns</span><span class="p">)</span>
|
|
</span><span id="L-644"><a href="#L-644"><span class="linenos"> 644</span></a> <span class="k">elif</span> <span class="n">expression</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span>
|
|
</span><span id="L-645"><a href="#L-645"><span class="linenos"> 645</span></a> <span class="k">if</span> <span class="ow">not</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">Dot</span><span class="p">):</span>
|
|
</span><span id="L-646"><a href="#L-646"><span class="linenos"> 646</span></a> <span class="n">tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">table</span><span class="p">)</span>
|
|
</span><span id="L-647"><a href="#L-647"><span class="linenos"> 647</span></a> <span class="n">_add_except_columns</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">tables</span><span class="p">,</span> <span class="n">except_columns</span><span class="p">)</span>
|
|
</span><span id="L-648"><a href="#L-648"><span class="linenos"> 648</span></a> <span class="n">_add_replace_columns</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">tables</span><span class="p">,</span> <span class="n">replace_columns</span><span class="p">)</span>
|
|
</span><span id="L-649"><a href="#L-649"><span class="linenos"> 649</span></a> <span class="n">_add_rename_columns</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">tables</span><span class="p">,</span> <span class="n">rename_columns</span><span class="p">)</span>
|
|
</span><span id="L-650"><a href="#L-650"><span class="linenos"> 650</span></a> <span class="k">elif</span> <span class="n">is_bigquery</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="n">struct_fields</span> <span class="o">=</span> <span class="n">_expand_struct_stars</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
|
</span><span id="L-652"><a href="#L-652"><span class="linenos"> 652</span></a> <span class="k">if</span> <span class="n">struct_fields</span><span class="p">:</span>
|
|
</span><span id="L-653"><a href="#L-653"><span class="linenos"> 653</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">struct_fields</span><span class="p">)</span>
|
|
</span><span id="L-654"><a href="#L-654"><span class="linenos"> 654</span></a> <span class="k">continue</span>
|
|
</span><span id="L-655"><a href="#L-655"><span class="linenos"> 655</span></a>
|
|
</span><span id="L-656"><a href="#L-656"><span class="linenos"> 656</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">tables</span><span class="p">:</span>
|
|
</span><span id="L-657"><a href="#L-657"><span class="linenos"> 657</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
|
</span><span id="L-658"><a href="#L-658"><span class="linenos"> 658</span></a> <span class="k">continue</span>
|
|
</span><span id="L-659"><a href="#L-659"><span class="linenos"> 659</span></a>
|
|
</span><span id="L-660"><a href="#L-660"><span class="linenos"> 660</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span>
|
|
</span><span id="L-661"><a href="#L-661"><span class="linenos"> 661</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span>
|
|
</span><span id="L-662"><a href="#L-662"><span class="linenos"> 662</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
|
|
</span><span id="L-663"><a href="#L-663"><span class="linenos"> 663</span></a>
|
|
</span><span id="L-664"><a href="#L-664"><span class="linenos"> 664</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">table</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
|
|
</span><span id="L-665"><a href="#L-665"><span class="linenos"> 665</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">columns</span> <span class="ow">or</span> <span class="n">scope</span><span class="o">.</span><span class="n">outer_columns</span>
|
|
</span><span id="L-666"><a href="#L-666"><span class="linenos"> 666</span></a>
|
|
</span><span id="L-667"><a href="#L-667"><span class="linenos"> 667</span></a> <span class="k">if</span> <span class="n">pseudocolumns</span><span class="p">:</span>
|
|
</span><span id="L-668"><a href="#L-668"><span class="linenos"> 668</span></a> <span class="n">columns</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="ow">in</span> <span class="n">columns</span> <span class="k">if</span> <span class="n">name</span><span class="o">.</span><span class="n">upper</span><span class="p">()</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">pseudocolumns</span><span class="p">]</span>
|
|
</span><span id="L-669"><a href="#L-669"><span class="linenos"> 669</span></a>
|
|
</span><span id="L-670"><a href="#L-670"><span class="linenos"> 670</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span>
|
|
</span><span id="L-671"><a href="#L-671"><span class="linenos"> 671</span></a> <span class="k">return</span>
|
|
</span><span id="L-672"><a href="#L-672"><span class="linenos"> 672</span></a>
|
|
</span><span id="L-673"><a href="#L-673"><span class="linenos"> 673</span></a> <span class="n">table_id</span> <span class="o">=</span> <span class="nb">id</span><span class="p">(</span><span class="n">table</span><span class="p">)</span>
|
|
</span><span id="L-674"><a href="#L-674"><span class="linenos"> 674</span></a> <span class="n">columns_to_exclude</span> <span class="o">=</span> <span class="n">except_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_id</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">set</span><span class="p">()</span>
|
|
</span><span id="L-675"><a href="#L-675"><span class="linenos"> 675</span></a> <span class="n">renamed_columns</span> <span class="o">=</span> <span class="n">rename_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_id</span><span class="p">,</span> <span class="p">{})</span>
|
|
</span><span id="L-676"><a href="#L-676"><span class="linenos"> 676</span></a> <span class="n">replaced_columns</span> <span class="o">=</span> <span class="n">replace_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_id</span><span class="p">,</span> <span class="p">{})</span>
|
|
</span><span id="L-677"><a href="#L-677"><span class="linenos"> 677</span></a>
|
|
</span><span id="L-678"><a href="#L-678"><span class="linenos"> 678</span></a> <span class="k">if</span> <span class="n">pivot</span><span class="p">:</span>
|
|
</span><span id="L-679"><a href="#L-679"><span class="linenos"> 679</span></a> <span class="k">if</span> <span class="n">pivot_output_columns</span> <span class="ow">and</span> <span class="n">pivot_exclude_columns</span><span class="p">:</span>
|
|
</span><span id="L-680"><a href="#L-680"><span class="linenos"> 680</span></a> <span class="n">pivot_columns</span> <span class="o">=</span> <span class="p">[</span><span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">columns</span> <span class="k">if</span> <span class="n">c</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">pivot_exclude_columns</span><span class="p">]</span>
|
|
</span><span id="L-681"><a href="#L-681"><span class="linenos"> 681</span></a> <span class="n">pivot_columns</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">pivot_output_columns</span><span class="p">)</span>
|
|
</span><span id="L-682"><a href="#L-682"><span class="linenos"> 682</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-683"><a href="#L-683"><span class="linenos"> 683</span></a> <span class="n">pivot_columns</span> <span class="o">=</span> <span class="n">pivot</span><span class="o">.</span><span class="n">alias_column_names</span>
|
|
</span><span id="L-684"><a href="#L-684"><span class="linenos"> 684</span></a>
|
|
</span><span id="L-685"><a href="#L-685"><span class="linenos"> 685</span></a> <span class="k">if</span> <span class="n">pivot_columns</span><span class="p">:</span>
|
|
</span><span id="L-686"><a href="#L-686"><span class="linenos"> 686</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span>
|
|
</span><span id="L-687"><a href="#L-687"><span class="linenos"> 687</span></a> <span class="n">alias</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">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">pivot</span><span class="o">.</span><span class="n">alias</span><span class="p">),</span> <span class="n">name</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-688"><a href="#L-688"><span class="linenos"> 688</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">pivot_columns</span>
|
|
</span><span id="L-689"><a href="#L-689"><span class="linenos"> 689</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">columns_to_exclude</span>
|
|
</span><span id="L-690"><a href="#L-690"><span class="linenos"> 690</span></a> <span class="p">)</span>
|
|
</span><span id="L-691"><a href="#L-691"><span class="linenos"> 691</span></a> <span class="k">continue</span>
|
|
</span><span id="L-692"><a href="#L-692"><span class="linenos"> 692</span></a>
|
|
</span><span id="L-693"><a href="#L-693"><span class="linenos"> 693</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span>
|
|
</span><span id="L-694"><a href="#L-694"><span class="linenos"> 694</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">columns_to_exclude</span> <span class="ow">or</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">coalesced_columns</span><span class="p">:</span>
|
|
</span><span id="L-695"><a href="#L-695"><span class="linenos"> 695</span></a> <span class="k">continue</span>
|
|
</span><span id="L-696"><a href="#L-696"><span class="linenos"> 696</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">using_column_tables</span> <span class="ow">and</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">using_column_tables</span><span class="p">[</span><span class="n">name</span><span class="p">]:</span>
|
|
</span><span id="L-697"><a href="#L-697"><span class="linenos"> 697</span></a> <span class="n">coalesced_columns</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-698"><a href="#L-698"><span class="linenos"> 698</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">using_column_tables</span><span class="p">[</span><span class="n">name</span><span class="p">]</span>
|
|
</span><span id="L-699"><a href="#L-699"><span class="linenos"> 699</span></a> <span class="n">coalesce_args</span> <span class="o">=</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">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">)</span> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">]</span>
|
|
</span><span id="L-700"><a href="#L-700"><span class="linenos"> 700</span></a>
|
|
</span><span id="L-701"><a href="#L-701"><span class="linenos"> 701</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
|
|
</span><span id="L-702"><a href="#L-702"><span class="linenos"> 702</span></a> <span class="n">alias</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="o">*</span><span class="n">coalesce_args</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">name</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-703"><a href="#L-703"><span class="linenos"> 703</span></a> <span class="p">)</span>
|
|
</span><span id="L-704"><a href="#L-704"><span class="linenos"> 704</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-705"><a href="#L-705"><span class="linenos"> 705</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="n">renamed_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span>
|
|
</span><span id="L-706"><a href="#L-706"><span class="linenos"> 706</span></a> <span class="n">selection_expr</span> <span class="o">=</span> <span class="n">replaced_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">)</span>
|
|
</span><span id="L-707"><a href="#L-707"><span class="linenos"> 707</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
|
|
</span><span id="L-708"><a href="#L-708"><span class="linenos"> 708</span></a> <span class="n">alias</span><span class="p">(</span><span class="n">selection_expr</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="L-709"><a href="#L-709"><span class="linenos"> 709</span></a> <span class="k">if</span> <span class="n">alias_</span> <span class="o">!=</span> <span class="n">name</span>
|
|
</span><span id="L-710"><a href="#L-710"><span class="linenos"> 710</span></a> <span class="k">else</span> <span class="n">selection_expr</span>
|
|
</span><span id="L-711"><a href="#L-711"><span class="linenos"> 711</span></a> <span class="p">)</span>
|
|
</span><span id="L-712"><a href="#L-712"><span class="linenos"> 712</span></a>
|
|
</span><span id="L-713"><a href="#L-713"><span class="linenos"> 713</span></a> <span class="c1"># Ensures we don't overwrite the initial selections with an empty list</span>
|
|
</span><span id="L-714"><a href="#L-714"><span class="linenos"> 714</span></a> <span class="k">if</span> <span class="n">new_selections</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</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">Select</span><span class="p">):</span>
|
|
</span><span id="L-715"><a href="#L-715"><span class="linenos"> 715</span></a> <span class="n">scope</span><span class="o">.</span><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">new_selections</span><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><span id="L-718"><a href="#L-718"><span class="linenos"> 718</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_add_except_columns</span><span class="p">(</span>
|
|
</span><span id="L-719"><a href="#L-719"><span class="linenos"> 719</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 class="n">tables</span><span class="p">,</span> <span class="n">except_columns</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">int</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><span id="L-720"><a href="#L-720"><span class="linenos"> 720</span></a><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="L-721"><a href="#L-721"><span class="linenos"> 721</span></a> <span class="n">except_</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">"except"</span><span class="p">)</span>
|
|
</span><span id="L-722"><a href="#L-722"><span class="linenos"> 722</span></a>
|
|
</span><span id="L-723"><a href="#L-723"><span class="linenos"> 723</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">except_</span><span class="p">:</span>
|
|
</span><span id="L-724"><a href="#L-724"><span class="linenos"> 724</span></a> <span class="k">return</span>
|
|
</span><span id="L-725"><a href="#L-725"><span class="linenos"> 725</span></a>
|
|
</span><span id="L-726"><a href="#L-726"><span class="linenos"> 726</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">e</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">except_</span><span class="p">}</span>
|
|
</span><span id="L-727"><a href="#L-727"><span class="linenos"> 727</span></a>
|
|
</span><span id="L-728"><a href="#L-728"><span class="linenos"> 728</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span>
|
|
</span><span id="L-729"><a href="#L-729"><span class="linenos"> 729</span></a> <span class="n">except_columns</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">table</span><span class="p">)]</span> <span class="o">=</span> <span class="n">columns</span>
|
|
</span><span id="L-730"><a href="#L-730"><span class="linenos"> 730</span></a>
|
|
</span><span id="L-731"><a href="#L-731"><span class="linenos"> 731</span></a>
|
|
</span><span id="L-732"><a href="#L-732"><span class="linenos"> 732</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_add_rename_columns</span><span class="p">(</span>
|
|
</span><span id="L-733"><a href="#L-733"><span class="linenos"> 733</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 class="n">tables</span><span class="p">,</span> <span class="n">rename_columns</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">int</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="nb">str</span><span class="p">]]</span>
|
|
</span><span id="L-734"><a href="#L-734"><span class="linenos"> 734</span></a><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="L-735"><a href="#L-735"><span class="linenos"> 735</span></a> <span class="n">rename</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">"rename"</span><span class="p">)</span>
|
|
</span><span id="L-736"><a href="#L-736"><span class="linenos"> 736</span></a>
|
|
</span><span id="L-737"><a href="#L-737"><span class="linenos"> 737</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">rename</span><span class="p">:</span>
|
|
</span><span id="L-738"><a href="#L-738"><span class="linenos"> 738</span></a> <span class="k">return</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 class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">e</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> <span class="n">e</span><span class="o">.</span><span class="n">alias</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">rename</span><span class="p">}</span>
|
|
</span><span id="L-741"><a href="#L-741"><span class="linenos"> 741</span></a>
|
|
</span><span id="L-742"><a href="#L-742"><span class="linenos"> 742</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span>
|
|
</span><span id="L-743"><a href="#L-743"><span class="linenos"> 743</span></a> <span class="n">rename_columns</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">table</span><span class="p">)]</span> <span class="o">=</span> <span class="n">columns</span>
|
|
</span><span id="L-744"><a href="#L-744"><span class="linenos"> 744</span></a>
|
|
</span><span id="L-745"><a href="#L-745"><span class="linenos"> 745</span></a>
|
|
</span><span id="L-746"><a href="#L-746"><span class="linenos"> 746</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_add_replace_columns</span><span class="p">(</span>
|
|
</span><span id="L-747"><a href="#L-747"><span class="linenos"> 747</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 class="n">tables</span><span class="p">,</span> <span class="n">replace_columns</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">int</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">Alias</span><span class="p">]]</span>
|
|
</span><span id="L-748"><a href="#L-748"><span class="linenos"> 748</span></a><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="L-749"><a href="#L-749"><span class="linenos"> 749</span></a> <span class="n">replace</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">"replace"</span><span class="p">)</span>
|
|
</span><span id="L-750"><a href="#L-750"><span class="linenos"> 750</span></a>
|
|
</span><span id="L-751"><a href="#L-751"><span class="linenos"> 751</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">replace</span><span class="p">:</span>
|
|
</span><span id="L-752"><a href="#L-752"><span class="linenos"> 752</span></a> <span class="k">return</span>
|
|
</span><span id="L-753"><a href="#L-753"><span class="linenos"> 753</span></a>
|
|
</span><span id="L-754"><a href="#L-754"><span class="linenos"> 754</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">e</span><span class="o">.</span><span class="n">alias</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">replace</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">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span>
|
|
</span><span id="L-757"><a href="#L-757"><span class="linenos"> 757</span></a> <span class="n">replace_columns</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">table</span><span class="p">)]</span> <span class="o">=</span> <span class="n">columns</span>
|
|
</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><span id="L-760"><a href="#L-760"><span class="linenos"> 760</span></a><span class="k">def</span><span class="w"> </span><span class="nf">qualify_outputs</span><span class="p">(</span><span class="n">scope_or_expression</span><span class="p">:</span> <span class="n">Scope</span> <span class="o">|</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-761"><a href="#L-761"><span class="linenos"> 761</span></a><span class="w"> </span><span class="sd">"""Ensure all output columns are aliased"""</span>
|
|
</span><span id="L-762"><a href="#L-762"><span class="linenos"> 762</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope_or_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-763"><a href="#L-763"><span class="linenos"> 763</span></a> <span class="n">scope</span> <span class="o">=</span> <span class="n">build_scope</span><span class="p">(</span><span class="n">scope_or_expression</span><span class="p">)</span>
|
|
</span><span id="L-764"><a href="#L-764"><span class="linenos"> 764</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span>
|
|
</span><span id="L-765"><a href="#L-765"><span class="linenos"> 765</span></a> <span class="k">return</span>
|
|
</span><span id="L-766"><a href="#L-766"><span class="linenos"> 766</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-767"><a href="#L-767"><span class="linenos"> 767</span></a> <span class="n">scope</span> <span class="o">=</span> <span class="n">scope_or_expression</span>
|
|
</span><span id="L-768"><a href="#L-768"><span class="linenos"> 768</span></a>
|
|
</span><span id="L-769"><a href="#L-769"><span class="linenos"> 769</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span>
|
|
</span><span id="L-770"><a href="#L-770"><span class="linenos"> 770</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">aliased_column</span><span class="p">)</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span>
|
|
</span><span id="L-771"><a href="#L-771"><span class="linenos"> 771</span></a> <span class="n">itertools</span><span class="o">.</span><span class="n">zip_longest</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">outer_columns</span><span class="p">)</span>
|
|
</span><span id="L-772"><a href="#L-772"><span class="linenos"> 772</span></a> <span class="p">):</span>
|
|
</span><span id="L-773"><a href="#L-773"><span class="linenos"> 773</span></a> <span class="k">if</span> <span class="n">selection</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="L-774"><a href="#L-774"><span class="linenos"> 774</span></a> <span class="k">break</span>
|
|
</span><span id="L-775"><a href="#L-775"><span class="linenos"> 775</span></a>
|
|
</span><span id="L-776"><a href="#L-776"><span class="linenos"> 776</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span>
|
|
</span><span id="L-777"><a href="#L-777"><span class="linenos"> 777</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">selection</span><span class="o">.</span><span class="n">output_name</span><span class="p">:</span>
|
|
</span><span id="L-778"><a href="#L-778"><span class="linenos"> 778</span></a> <span class="n">selection</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">TableAlias</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">to_identifier</span><span class="p">(</span><span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">)))</span>
|
|
</span><span id="L-779"><a href="#L-779"><span class="linenos"> 779</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">selection</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="ow">and</span> <span class="ow">not</span> <span class="n">selection</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span>
|
|
</span><span id="L-780"><a href="#L-780"><span class="linenos"> 780</span></a> <span class="n">selection</span> <span class="o">=</span> <span class="n">alias</span><span class="p">(</span>
|
|
</span><span id="L-781"><a href="#L-781"><span class="linenos"> 781</span></a> <span class="n">selection</span><span class="p">,</span>
|
|
</span><span id="L-782"><a href="#L-782"><span class="linenos"> 782</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">selection</span><span class="o">.</span><span class="n">output_name</span> <span class="ow">or</span> <span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">,</span>
|
|
</span><span id="L-783"><a href="#L-783"><span class="linenos"> 783</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
|
|
</span><span id="L-784"><a href="#L-784"><span class="linenos"> 784</span></a> <span class="p">)</span>
|
|
</span><span id="L-785"><a href="#L-785"><span class="linenos"> 785</span></a> <span class="k">if</span> <span class="n">aliased_column</span><span class="p">:</span>
|
|
</span><span id="L-786"><a href="#L-786"><span class="linenos"> 786</span></a> <span class="n">selection</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">aliased_column</span><span class="p">))</span>
|
|
</span><span id="L-787"><a href="#L-787"><span class="linenos"> 787</span></a>
|
|
</span><span id="L-788"><a href="#L-788"><span class="linenos"> 788</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">selection</span><span class="p">)</span>
|
|
</span><span id="L-789"><a href="#L-789"><span class="linenos"> 789</span></a>
|
|
</span><span id="L-790"><a href="#L-790"><span class="linenos"> 790</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</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">Select</span><span class="p">):</span>
|
|
</span><span id="L-791"><a href="#L-791"><span class="linenos"> 791</span></a> <span class="n">scope</span><span class="o">.</span><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">new_selections</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><span id="L-794"><a href="#L-794"><span class="linenos"> 794</span></a><span class="k">def</span><span class="w"> </span><span class="nf">quote_identifiers</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="n">dialect</span><span class="p">:</span> <span class="n">DialectType</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">identify</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
|
|
</span><span id="L-795"><a href="#L-795"><span class="linenos"> 795</span></a><span class="w"> </span><span class="sd">"""Makes sure all identifiers that need to be quoted are quoted."""</span>
|
|
</span><span id="L-796"><a href="#L-796"><span class="linenos"> 796</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span>
|
|
</span><span id="L-797"><a href="#L-797"><span class="linenos"> 797</span></a> <span class="n">Dialect</span><span class="o">.</span><span class="n">get_or_raise</span><span class="p">(</span><span class="n">dialect</span><span class="p">)</span><span class="o">.</span><span class="n">quote_identifier</span><span class="p">,</span> <span class="n">identify</span><span class="o">=</span><span class="n">identify</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span>
|
|
</span><span id="L-798"><a href="#L-798"><span class="linenos"> 798</span></a> <span class="p">)</span> <span class="c1"># type: ignore</span>
|
|
</span><span id="L-799"><a href="#L-799"><span class="linenos"> 799</span></a>
|
|
</span><span id="L-800"><a href="#L-800"><span class="linenos"> 800</span></a>
|
|
</span><span id="L-801"><a href="#L-801"><span class="linenos"> 801</span></a><span class="k">def</span><span class="w"> </span><span class="nf">pushdown_cte_alias_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-802"><a href="#L-802"><span class="linenos"> 802</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="L-803"><a href="#L-803"><span class="linenos"> 803</span></a><span class="sd"> Pushes down the CTE alias columns into the projection,</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 class="sd"> This step is useful in Snowflake where the CTE alias columns can be referenced in the HAVING.</span>
|
|
</span><span id="L-806"><a href="#L-806"><span class="linenos"> 806</span></a>
|
|
</span><span id="L-807"><a href="#L-807"><span class="linenos"> 807</span></a><span class="sd"> Example:</span>
|
|
</span><span id="L-808"><a href="#L-808"><span class="linenos"> 808</span></a><span class="sd"> >>> import sqlglot</span>
|
|
</span><span id="L-809"><a href="#L-809"><span class="linenos"> 809</span></a><span class="sd"> >>> expression = sqlglot.parse_one("WITH y (c) AS (SELECT SUM(a) FROM ( SELECT 1 a ) AS x HAVING c > 0) SELECT c FROM y")</span>
|
|
</span><span id="L-810"><a href="#L-810"><span class="linenos"> 810</span></a><span class="sd"> >>> pushdown_cte_alias_columns(expression).sql()</span>
|
|
</span><span id="L-811"><a href="#L-811"><span class="linenos"> 811</span></a><span class="sd"> 'WITH y(c) AS (SELECT SUM(a) AS c FROM (SELECT 1 AS a) AS x HAVING c > 0) SELECT c FROM y'</span>
|
|
</span><span id="L-812"><a href="#L-812"><span class="linenos"> 812</span></a>
|
|
</span><span id="L-813"><a href="#L-813"><span class="linenos"> 813</span></a><span class="sd"> Args:</span>
|
|
</span><span id="L-814"><a href="#L-814"><span class="linenos"> 814</span></a><span class="sd"> expression: Expression to pushdown.</span>
|
|
</span><span id="L-815"><a href="#L-815"><span class="linenos"> 815</span></a>
|
|
</span><span id="L-816"><a href="#L-816"><span class="linenos"> 816</span></a><span class="sd"> Returns:</span>
|
|
</span><span id="L-817"><a href="#L-817"><span class="linenos"> 817</span></a><span class="sd"> The expression with the CTE aliases pushed down into the projection.</span>
|
|
</span><span id="L-818"><a href="#L-818"><span class="linenos"> 818</span></a><span class="sd"> """</span>
|
|
</span><span id="L-819"><a href="#L-819"><span class="linenos"> 819</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">find_all</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="L-820"><a href="#L-820"><span class="linenos"> 820</span></a> <span class="k">if</span> <span class="n">cte</span><span class="o">.</span><span class="n">alias_column_names</span><span class="p">:</span>
|
|
</span><span id="L-821"><a href="#L-821"><span class="linenos"> 821</span></a> <span class="n">new_expressions</span> <span class="o">=</span> <span class="p">[]</span>
|
|
</span><span id="L-822"><a href="#L-822"><span class="linenos"> 822</span></a> <span class="k">for</span> <span class="n">_alias</span><span class="p">,</span> <span class="n">projection</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">cte</span><span class="o">.</span><span class="n">alias_column_names</span><span class="p">,</span> <span class="n">cte</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-823"><a href="#L-823"><span class="linenos"> 823</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">projection</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-824"><a href="#L-824"><span class="linenos"> 824</span></a> <span class="n">projection</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">_alias</span><span class="p">)</span>
|
|
</span><span id="L-825"><a href="#L-825"><span class="linenos"> 825</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-826"><a href="#L-826"><span class="linenos"> 826</span></a> <span class="n">projection</span> <span class="o">=</span> <span class="n">alias</span><span class="p">(</span><span class="n">projection</span><span class="p">,</span> <span class="n">alias</span><span class="o">=</span><span class="n">_alias</span><span class="p">)</span>
|
|
</span><span id="L-827"><a href="#L-827"><span class="linenos"> 827</span></a> <span class="n">new_expressions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">projection</span><span class="p">)</span>
|
|
</span><span id="L-828"><a href="#L-828"><span class="linenos"> 828</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">this</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">new_expressions</span><span class="p">)</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 class="k">return</span> <span class="n">expression</span>
|
|
</span><span id="L-831"><a href="#L-831"><span class="linenos"> 831</span></a>
|
|
</span><span id="L-832"><a href="#L-832"><span class="linenos"> 832</span></a>
|
|
</span><span id="L-833"><a href="#L-833"><span class="linenos"> 833</span></a><span class="k">class</span><span class="w"> </span><span class="nc">Resolver</span><span class="p">:</span>
|
|
</span><span id="L-834"><a href="#L-834"><span class="linenos"> 834</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="L-835"><a href="#L-835"><span class="linenos"> 835</span></a><span class="sd"> Helper for resolving columns.</span>
|
|
</span><span id="L-836"><a href="#L-836"><span class="linenos"> 836</span></a>
|
|
</span><span id="L-837"><a href="#L-837"><span class="linenos"> 837</span></a><span class="sd"> This is a class so we can lazily load some things and easily share them across functions.</span>
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</span><span id="L-838"><a href="#L-838"><span class="linenos"> 838</span></a><span class="sd"> """</span>
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</span><span id="L-839"><a href="#L-839"><span class="linenos"> 839</span></a>
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</span><span id="L-840"><a href="#L-840"><span class="linenos"> 840</span></a> <span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">:</span> <span class="n">Schema</span><span class="p">,</span> <span class="n">infer_schema</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="L-841"><a href="#L-841"><span class="linenos"> 841</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span> <span class="o">=</span> <span class="n">scope</span>
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</span><span id="L-842"><a href="#L-842"><span class="linenos"> 842</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">schema</span>
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</span><span id="L-843"><a href="#L-843"><span class="linenos"> 843</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</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">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]]]</span> <span class="o">=</span> <span class="kc">None</span>
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</span><span id="L-844"><a href="#L-844"><span class="linenos"> 844</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Mapping</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span>
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</span><span id="L-845"><a href="#L-845"><span class="linenos"> 845</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</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="o">=</span> <span class="kc">None</span>
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</span><span id="L-846"><a href="#L-846"><span class="linenos"> 846</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_infer_schema</span> <span class="o">=</span> <span class="n">infer_schema</span>
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</span><span id="L-847"><a href="#L-847"><span class="linenos"> 847</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_source_columns_cache</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="n">t</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">bool</span><span class="p">],</span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="p">{}</span>
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</span><span id="L-848"><a href="#L-848"><span class="linenos"> 848</span></a>
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</span><span id="L-849"><a href="#L-849"><span class="linenos"> 849</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">get_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</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-850"><a href="#L-850"><span class="linenos"> 850</span></a><span class="w"> </span><span class="sd">"""</span>
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</span><span id="L-851"><a href="#L-851"><span class="linenos"> 851</span></a><span class="sd"> Get the table for a column name.</span>
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</span><span id="L-852"><a href="#L-852"><span class="linenos"> 852</span></a>
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</span><span id="L-853"><a href="#L-853"><span class="linenos"> 853</span></a><span class="sd"> Args:</span>
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</span><span id="L-854"><a href="#L-854"><span class="linenos"> 854</span></a><span class="sd"> column_name: The column name to find the table for.</span>
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</span><span id="L-855"><a href="#L-855"><span class="linenos"> 855</span></a><span class="sd"> Returns:</span>
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</span><span id="L-856"><a href="#L-856"><span class="linenos"> 856</span></a><span class="sd"> The table name if it can be found/inferred.</span>
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</span><span id="L-857"><a href="#L-857"><span class="linenos"> 857</span></a><span class="sd"> """</span>
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</span><span id="L-858"><a href="#L-858"><span class="linenos"> 858</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
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</span><span id="L-859"><a href="#L-859"><span class="linenos"> 859</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_unambiguous_columns</span><span class="p">(</span>
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</span><span id="L-860"><a href="#L-860"><span class="linenos"> 860</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span>
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</span><span id="L-861"><a href="#L-861"><span class="linenos"> 861</span></a> <span class="p">)</span>
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</span><span id="L-862"><a href="#L-862"><span class="linenos"> 862</span></a>
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</span><span id="L-863"><a href="#L-863"><span class="linenos"> 863</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span>
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</span><span id="L-864"><a href="#L-864"><span class="linenos"> 864</span></a>
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</span><span id="L-865"><a href="#L-865"><span class="linenos"> 865</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_name</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_infer_schema</span><span class="p">:</span>
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</span><span id="L-866"><a href="#L-866"><span class="linenos"> 866</span></a> <span class="n">sources_without_schema</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span>
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</span><span id="L-867"><a href="#L-867"><span class="linenos"> 867</span></a> <span class="n">source</span>
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</span><span id="L-868"><a href="#L-868"><span class="linenos"> 868</span></a> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span>
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</span><span id="L-869"><a href="#L-869"><span class="linenos"> 869</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span>
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</span><span id="L-870"><a href="#L-870"><span class="linenos"> 870</span></a> <span class="p">)</span>
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</span><span id="L-871"><a href="#L-871"><span class="linenos"> 871</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</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-872"><a href="#L-872"><span class="linenos"> 872</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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</span><span id="L-873"><a href="#L-873"><span class="linenos"> 873</span></a>
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</span><span id="L-874"><a href="#L-874"><span class="linenos"> 874</span></a> <span class="k">if</span> <span class="n">table_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span>
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</span><span id="L-875"><a href="#L-875"><span class="linenos"> 875</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span>
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</span><span id="L-876"><a href="#L-876"><span class="linenos"> 876</span></a>
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</span><span id="L-877"><a href="#L-877"><span class="linenos"> 877</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span>
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</span><span id="L-878"><a href="#L-878"><span class="linenos"> 878</span></a>
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</span><span id="L-879"><a href="#L-879"><span class="linenos"> 879</span></a> <span class="k">if</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">Query</span><span class="p">):</span>
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</span><span id="L-880"><a href="#L-880"><span class="linenos"> 880</span></a> <span class="k">while</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">alias</span> <span class="o">!=</span> <span class="n">table_name</span><span class="p">:</span>
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</span><span id="L-881"><a href="#L-881"><span class="linenos"> 881</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">parent</span>
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</span><span id="L-882"><a href="#L-882"><span class="linenos"> 882</span></a>
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</span><span id="L-883"><a href="#L-883"><span class="linenos"> 883</span></a> <span class="n">node_alias</span> <span class="o">=</span> <span class="n">node</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-884"><a href="#L-884"><span class="linenos"> 884</span></a> <span class="k">if</span> <span class="n">node_alias</span><span class="p">:</span>
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</span><span id="L-885"><a href="#L-885"><span class="linenos"> 885</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">node_alias</span><span class="o">.</span><span class="n">this</span><span class="p">)</span>
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</span><span id="L-886"><a href="#L-886"><span class="linenos"> 886</span></a>
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</span><span id="L-887"><a href="#L-887"><span class="linenos"> 887</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span>
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</span><span id="L-888"><a href="#L-888"><span class="linenos"> 888</span></a>
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</span><span id="L-889"><a href="#L-889"><span class="linenos"> 889</span></a> <span class="nd">@property</span>
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</span><span id="L-890"><a href="#L-890"><span class="linenos"> 890</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">all_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></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>
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</span><span id="L-891"><a href="#L-891"><span class="linenos"> 891</span></a><span class="w"> </span><span class="sd">"""All available columns of all sources in this scope"""</span>
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</span><span id="L-892"><a href="#L-892"><span class="linenos"> 892</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
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</span><span id="L-893"><a href="#L-893"><span class="linenos"> 893</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="p">{</span>
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</span><span id="L-894"><a href="#L-894"><span class="linenos"> 894</span></a> <span class="n">column</span> <span class="k">for</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span>
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</span><span id="L-895"><a href="#L-895"><span class="linenos"> 895</span></a> <span class="p">}</span>
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</span><span id="L-896"><a href="#L-896"><span class="linenos"> 896</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span>
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</span><span id="L-897"><a href="#L-897"><span class="linenos"> 897</span></a>
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</span><span id="L-898"><a href="#L-898"><span class="linenos"> 898</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</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="n">only_visible</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span>
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</span><span id="L-899"><a href="#L-899"><span class="linenos"> 899</span></a><span class="w"> </span><span class="sd">"""Resolve the source columns for a given source `name`."""</span>
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</span><span id="L-900"><a href="#L-900"><span class="linenos"> 900</span></a> <span class="n">cache_key</span> <span class="o">=</span> <span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span>
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</span><span id="L-901"><a href="#L-901"><span class="linenos"> 901</span></a> <span class="k">if</span> <span class="n">cache_key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_source_columns_cache</span><span class="p">:</span>
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</span><span id="L-902"><a href="#L-902"><span class="linenos"> 902</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span>
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</span><span id="L-903"><a href="#L-903"><span class="linenos"> 903</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
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</span><span id="L-904"><a href="#L-904"><span class="linenos"> 904</span></a>
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</span><span id="L-905"><a href="#L-905"><span class="linenos"> 905</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span>
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|
</span><span id="L-906"><a href="#L-906"><span class="linenos"> 906</span></a>
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|
</span><span id="L-907"><a href="#L-907"><span class="linenos"> 907</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <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="L-908"><a href="#L-908"><span class="linenos"> 908</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span>
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</span><span id="L-909"><a href="#L-909"><span class="linenos"> 909</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span>
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|
</span><span id="L-910"><a href="#L-910"><span class="linenos"> 910</span></a> <span class="n">source</span><span class="o">.</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">Values</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-911"><a href="#L-911"><span class="linenos"> 911</span></a> <span class="p">):</span>
|
|
</span><span id="L-912"><a href="#L-912"><span class="linenos"> 912</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span>
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|
</span><span id="L-913"><a href="#L-913"><span class="linenos"> 913</span></a>
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|
</span><span id="L-914"><a href="#L-914"><span class="linenos"> 914</span></a> <span class="c1"># in bigquery, unnest structs are automatically scoped as tables, so you can</span>
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|
</span><span id="L-915"><a href="#L-915"><span class="linenos"> 915</span></a> <span class="c1"># directly select a struct field in a query.</span>
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|
</span><span id="L-916"><a href="#L-916"><span class="linenos"> 916</span></a> <span class="c1"># this handles the case where the unnest is statically defined.</span>
|
|
</span><span id="L-917"><a href="#L-917"><span class="linenos"> 917</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">dialect</span> <span class="o">==</span> <span class="s2">"bigquery"</span><span class="p">:</span>
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|
</span><span id="L-918"><a href="#L-918"><span class="linenos"> 918</span></a> <span class="k">if</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</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">STRUCT</span><span class="p">):</span>
|
|
</span><span id="L-919"><a href="#L-919"><span class="linenos"> 919</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> <span class="c1"># type: ignore</span>
|
|
</span><span id="L-920"><a href="#L-920"><span class="linenos"> 920</span></a> <span class="n">columns</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">k</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
|
|
</span><span id="L-921"><a href="#L-921"><span class="linenos"> 921</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</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">SetOperation</span><span class="p">):</span>
|
|
</span><span id="L-922"><a href="#L-922"><span class="linenos"> 922</span></a> <span class="n">set_op</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span>
|
|
</span><span id="L-923"><a href="#L-923"><span class="linenos"> 923</span></a>
|
|
</span><span id="L-924"><a href="#L-924"><span class="linenos"> 924</span></a> <span class="c1"># BigQuery specific set operations modifiers, e.g INNER UNION ALL BY NAME</span>
|
|
</span><span id="L-925"><a href="#L-925"><span class="linenos"> 925</span></a> <span class="n">on_column_list</span> <span class="o">=</span> <span class="n">set_op</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><span id="L-926"><a href="#L-926"><span class="linenos"> 926</span></a>
|
|
</span><span id="L-927"><a href="#L-927"><span class="linenos"> 927</span></a> <span class="k">if</span> <span class="n">on_column_list</span><span class="p">:</span>
|
|
</span><span id="L-928"><a href="#L-928"><span class="linenos"> 928</span></a> <span class="c1"># The resulting columns are the columns in the ON clause:</span>
|
|
</span><span id="L-929"><a href="#L-929"><span class="linenos"> 929</span></a> <span class="c1"># {INNER | LEFT | FULL} UNION ALL BY NAME ON (col1, col2, ...)</span>
|
|
</span><span id="L-930"><a href="#L-930"><span class="linenos"> 930</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">[</span><span class="n">col</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">on_column_list</span><span class="p">]</span>
|
|
</span><span id="L-931"><a href="#L-931"><span class="linenos"> 931</span></a> <span class="k">elif</span> <span class="n">set_op</span><span class="o">.</span><span class="n">side</span> <span class="ow">or</span> <span class="n">set_op</span><span class="o">.</span><span class="n">kind</span><span class="p">:</span>
|
|
</span><span id="L-932"><a href="#L-932"><span class="linenos"> 932</span></a> <span class="n">side</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">side</span>
|
|
</span><span id="L-933"><a href="#L-933"><span class="linenos"> 933</span></a> <span class="n">kind</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">kind</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">left</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">left</span><span class="o">.</span><span class="n">named_selects</span>
|
|
</span><span id="L-936"><a href="#L-936"><span class="linenos"> 936</span></a> <span class="n">right</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">right</span><span class="o">.</span><span class="n">named_selects</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="c1"># We use dict.fromkeys to deduplicate keys and maintain insertion order</span>
|
|
</span><span id="L-939"><a href="#L-939"><span class="linenos"> 939</span></a> <span class="k">if</span> <span class="n">side</span> <span class="o">==</span> <span class="s2">"LEFT"</span><span class="p">:</span>
|
|
</span><span id="L-940"><a href="#L-940"><span class="linenos"> 940</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">left</span>
|
|
</span><span id="L-941"><a href="#L-941"><span class="linenos"> 941</span></a> <span class="k">elif</span> <span class="n">side</span> <span class="o">==</span> <span class="s2">"FULL"</span><span class="p">:</span>
|
|
</span><span id="L-942"><a href="#L-942"><span class="linenos"> 942</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">dict</span><span class="o">.</span><span class="n">fromkeys</span><span class="p">(</span><span class="n">left</span> <span class="o">+</span> <span class="n">right</span><span class="p">))</span>
|
|
</span><span id="L-943"><a href="#L-943"><span class="linenos"> 943</span></a> <span class="k">elif</span> <span class="n">kind</span> <span class="o">==</span> <span class="s2">"INNER"</span><span class="p">:</span>
|
|
</span><span id="L-944"><a href="#L-944"><span class="linenos"> 944</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">dict</span><span class="o">.</span><span class="n">fromkeys</span><span class="p">(</span><span class="n">left</span><span class="p">)</span><span class="o">.</span><span class="n">keys</span><span class="p">()</span> <span class="o">&</span> <span class="nb">dict</span><span class="o">.</span><span class="n">fromkeys</span><span class="p">(</span><span class="n">right</span><span class="p">)</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span>
|
|
</span><span id="L-945"><a href="#L-945"><span class="linenos"> 945</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-946"><a href="#L-946"><span class="linenos"> 946</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">named_selects</span>
|
|
</span><span id="L-947"><a href="#L-947"><span class="linenos"> 947</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-948"><a href="#L-948"><span class="linenos"> 948</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span>
|
|
</span><span id="L-949"><a href="#L-949"><span class="linenos"> 949</span></a>
|
|
</span><span id="L-950"><a href="#L-950"><span class="linenos"> 950</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
|
|
</span><span id="L-951"><a href="#L-951"><span class="linenos"> 951</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span>
|
|
</span><span id="L-952"><a href="#L-952"><span class="linenos"> 952</span></a> <span class="n">column_aliases</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span>
|
|
</span><span id="L-953"><a href="#L-953"><span class="linenos"> 953</span></a> <span class="k">elif</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">Expression</span><span class="p">):</span>
|
|
</span><span id="L-954"><a href="#L-954"><span class="linenos"> 954</span></a> <span class="n">column_aliases</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">alias_column_names</span>
|
|
</span><span id="L-955"><a href="#L-955"><span class="linenos"> 955</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="L-956"><a href="#L-956"><span class="linenos"> 956</span></a> <span class="n">column_aliases</span> <span class="o">=</span> <span class="p">[]</span>
|
|
</span><span id="L-957"><a href="#L-957"><span class="linenos"> 957</span></a>
|
|
</span><span id="L-958"><a href="#L-958"><span class="linenos"> 958</span></a> <span class="k">if</span> <span class="n">column_aliases</span><span class="p">:</span>
|
|
</span><span id="L-959"><a href="#L-959"><span class="linenos"> 959</span></a> <span class="c1"># If the source's columns are aliased, their aliases shadow the corresponding column names.</span>
|
|
</span><span id="L-960"><a href="#L-960"><span class="linenos"> 960</span></a> <span class="c1"># This can be expensive if there are lots of columns, so only do this if column_aliases exist.</span>
|
|
</span><span id="L-961"><a href="#L-961"><span class="linenos"> 961</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">[</span>
|
|
</span><span id="L-962"><a href="#L-962"><span class="linenos"> 962</span></a> <span class="n">alias</span> <span class="ow">or</span> <span class="n">name</span>
|
|
</span><span id="L-963"><a href="#L-963"><span class="linenos"> 963</span></a> <span class="k">for</span> <span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">zip_longest</span><span class="p">(</span><span class="n">columns</span><span class="p">,</span> <span class="n">column_aliases</span><span class="p">)</span>
|
|
</span><span id="L-964"><a href="#L-964"><span class="linenos"> 964</span></a> <span class="p">]</span>
|
|
</span><span id="L-965"><a href="#L-965"><span class="linenos"> 965</span></a>
|
|
</span><span id="L-966"><a href="#L-966"><span class="linenos"> 966</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_source_columns_cache</span><span class="p">[</span><span class="n">cache_key</span><span class="p">]</span> <span class="o">=</span> <span class="n">columns</span>
|
|
</span><span id="L-967"><a href="#L-967"><span class="linenos"> 967</span></a>
|
|
</span><span id="L-968"><a href="#L-968"><span class="linenos"> 968</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_source_columns_cache</span><span class="p">[</span><span class="n">cache_key</span><span class="p">]</span>
|
|
</span><span id="L-969"><a href="#L-969"><span class="linenos"> 969</span></a>
|
|
</span><span id="L-970"><a href="#L-970"><span class="linenos"> 970</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_get_all_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></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">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]]:</span>
|
|
</span><span id="L-971"><a href="#L-971"><span class="linenos"> 971</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="L-972"><a href="#L-972"><span class="linenos"> 972</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="p">{</span>
|
|
</span><span id="L-973"><a href="#L-973"><span class="linenos"> 973</span></a> <span class="n">source_name</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">source_name</span><span class="p">)</span>
|
|
</span><span id="L-974"><a href="#L-974"><span class="linenos"> 974</span></a> <span class="k">for</span> <span class="n">source_name</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span>
|
|
</span><span id="L-975"><a href="#L-975"><span class="linenos"> 975</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">(),</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">lateral_sources</span><span class="o">.</span><span class="n">items</span><span class="p">()</span>
|
|
</span><span id="L-976"><a href="#L-976"><span class="linenos"> 976</span></a> <span class="p">)</span>
|
|
</span><span id="L-977"><a href="#L-977"><span class="linenos"> 977</span></a> <span class="p">}</span>
|
|
</span><span id="L-978"><a href="#L-978"><span class="linenos"> 978</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span>
|
|
</span><span id="L-979"><a href="#L-979"><span class="linenos"> 979</span></a>
|
|
</span><span id="L-980"><a href="#L-980"><span class="linenos"> 980</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_get_unambiguous_columns</span><span class="p">(</span>
|
|
</span><span id="L-981"><a href="#L-981"><span class="linenos"> 981</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">source_columns</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">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span>
|
|
</span><span id="L-982"><a href="#L-982"><span class="linenos"> 982</span></a> <span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Mapping</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]:</span>
|
|
</span><span id="L-983"><a href="#L-983"><span class="linenos"> 983</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="L-984"><a href="#L-984"><span class="linenos"> 984</span></a><span class="sd"> Find all the unambiguous columns in sources.</span>
|
|
</span><span id="L-985"><a href="#L-985"><span class="linenos"> 985</span></a>
|
|
</span><span id="L-986"><a href="#L-986"><span class="linenos"> 986</span></a><span class="sd"> Args:</span>
|
|
</span><span id="L-987"><a href="#L-987"><span class="linenos"> 987</span></a><span class="sd"> source_columns: Mapping of names to source columns.</span>
|
|
</span><span id="L-988"><a href="#L-988"><span class="linenos"> 988</span></a>
|
|
</span><span id="L-989"><a href="#L-989"><span class="linenos"> 989</span></a><span class="sd"> Returns:</span>
|
|
</span><span id="L-990"><a href="#L-990"><span class="linenos"> 990</span></a><span class="sd"> Mapping of column name to source name.</span>
|
|
</span><span id="L-991"><a href="#L-991"><span class="linenos"> 991</span></a><span class="sd"> """</span>
|
|
</span><span id="L-992"><a href="#L-992"><span class="linenos"> 992</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source_columns</span><span class="p">:</span>
|
|
</span><span id="L-993"><a href="#L-993"><span class="linenos"> 993</span></a> <span class="k">return</span> <span class="p">{}</span>
|
|
</span><span id="L-994"><a href="#L-994"><span class="linenos"> 994</span></a>
|
|
</span><span id="L-995"><a href="#L-995"><span class="linenos"> 995</span></a> <span class="n">source_columns_pairs</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">source_columns</span><span class="o">.</span><span class="n">items</span><span class="p">())</span>
|
|
</span><span id="L-996"><a href="#L-996"><span class="linenos"> 996</span></a>
|
|
</span><span id="L-997"><a href="#L-997"><span class="linenos"> 997</span></a> <span class="n">first_table</span><span class="p">,</span> <span class="n">first_columns</span> <span class="o">=</span> <span class="n">source_columns_pairs</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
|
|
</span><span id="L-998"><a href="#L-998"><span class="linenos"> 998</span></a>
|
|
</span><span id="L-999"><a href="#L-999"><span class="linenos"> 999</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">source_columns_pairs</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
|
|
</span><span id="L-1000"><a href="#L-1000"><span class="linenos">1000</span></a> <span class="c1"># Performance optimization - avoid copying first_columns if there is only one table.</span>
|
|
</span><span id="L-1001"><a href="#L-1001"><span class="linenos">1001</span></a> <span class="k">return</span> <span class="n">SingleValuedMapping</span><span class="p">(</span><span class="n">first_columns</span><span class="p">,</span> <span class="n">first_table</span><span class="p">)</span>
|
|
</span><span id="L-1002"><a href="#L-1002"><span class="linenos">1002</span></a>
|
|
</span><span id="L-1003"><a href="#L-1003"><span class="linenos">1003</span></a> <span class="n">unambiguous_columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">col</span><span class="p">:</span> <span class="n">first_table</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">first_columns</span><span class="p">}</span>
|
|
</span><span id="L-1004"><a href="#L-1004"><span class="linenos">1004</span></a> <span class="n">all_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">unambiguous_columns</span><span class="p">)</span>
|
|
</span><span id="L-1005"><a href="#L-1005"><span class="linenos">1005</span></a>
|
|
</span><span id="L-1006"><a href="#L-1006"><span class="linenos">1006</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="n">source_columns_pairs</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span>
|
|
</span><span id="L-1007"><a href="#L-1007"><span class="linenos">1007</span></a> <span class="n">unique</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span>
|
|
</span><span id="L-1008"><a href="#L-1008"><span class="linenos">1008</span></a> <span class="n">ambiguous</span> <span class="o">=</span> <span class="n">all_columns</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="n">unique</span><span class="p">)</span>
|
|
</span><span id="L-1009"><a href="#L-1009"><span class="linenos">1009</span></a> <span class="n">all_columns</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span>
|
|
</span><span id="L-1010"><a href="#L-1010"><span class="linenos">1010</span></a>
|
|
</span><span id="L-1011"><a href="#L-1011"><span class="linenos">1011</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">ambiguous</span><span class="p">:</span>
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</span><span id="L-1012"><a href="#L-1012"><span class="linenos">1012</span></a> <span class="n">unambiguous_columns</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
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</span><span id="L-1013"><a href="#L-1013"><span class="linenos">1013</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">unique</span><span class="o">.</span><span class="n">difference</span><span class="p">(</span><span class="n">ambiguous</span><span class="p">):</span>
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</span><span id="L-1014"><a href="#L-1014"><span class="linenos">1014</span></a> <span class="n">unambiguous_columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">table</span>
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</span><span id="L-1015"><a href="#L-1015"><span class="linenos">1015</span></a>
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</span><span id="L-1016"><a href="#L-1016"><span class="linenos">1016</span></a> <span class="k">return</span> <span class="n">unambiguous_columns</span>
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</span></pre></div>
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</section>
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<section id="qualify_columns">
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<input id="qualify_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">qualify_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="param"> <span class="n">schema</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Dict</span><span class="p">,</span> <span class="n"><a href="../schema.html#Schema">sqlglot.schema.Schema</a></span><span class="p">]</span>,</span><span class="param"> <span class="n">expand_alias_refs</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span>,</span><span class="param"> <span class="n">expand_stars</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span>,</span><span class="param"> <span class="n">infer_schema</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">bool</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">allow_partial_qualification</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</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="qualify_columns-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#qualify_columns"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="qualify_columns-20"><a href="#qualify_columns-20"><span class="linenos"> 20</span></a><span class="k">def</span><span class="w"> </span><span class="nf">qualify_columns</span><span class="p">(</span>
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</span><span id="qualify_columns-21"><a href="#qualify_columns-21"><span class="linenos"> 21</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="qualify_columns-22"><a href="#qualify_columns-22"><span class="linenos"> 22</span></a> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span> <span class="o">|</span> <span class="n">Schema</span><span class="p">,</span>
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</span><span id="qualify_columns-23"><a href="#qualify_columns-23"><span class="linenos"> 23</span></a> <span class="n">expand_alias_refs</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="qualify_columns-24"><a href="#qualify_columns-24"><span class="linenos"> 24</span></a> <span class="n">expand_stars</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="qualify_columns-25"><a href="#qualify_columns-25"><span class="linenos"> 25</span></a> <span class="n">infer_schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">bool</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
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</span><span id="qualify_columns-26"><a href="#qualify_columns-26"><span class="linenos"> 26</span></a> <span class="n">allow_partial_qualification</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
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</span><span id="qualify_columns-27"><a href="#qualify_columns-27"><span class="linenos"> 27</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="qualify_columns-28"><a href="#qualify_columns-28"><span class="linenos"> 28</span></a><span class="w"> </span><span class="sd">"""</span>
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</span><span id="qualify_columns-29"><a href="#qualify_columns-29"><span class="linenos"> 29</span></a><span class="sd"> Rewrite sqlglot AST to have fully qualified columns.</span>
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</span><span id="qualify_columns-30"><a href="#qualify_columns-30"><span class="linenos"> 30</span></a>
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</span><span id="qualify_columns-31"><a href="#qualify_columns-31"><span class="linenos"> 31</span></a><span class="sd"> Example:</span>
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</span><span id="qualify_columns-32"><a href="#qualify_columns-32"><span class="linenos"> 32</span></a><span class="sd"> >>> import sqlglot</span>
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</span><span id="qualify_columns-33"><a href="#qualify_columns-33"><span class="linenos"> 33</span></a><span class="sd"> >>> schema = {"tbl": {"col": "INT"}}</span>
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</span><span id="qualify_columns-34"><a href="#qualify_columns-34"><span class="linenos"> 34</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT col FROM tbl")</span>
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</span><span id="qualify_columns-35"><a href="#qualify_columns-35"><span class="linenos"> 35</span></a><span class="sd"> >>> qualify_columns(expression, schema).sql()</span>
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</span><span id="qualify_columns-36"><a href="#qualify_columns-36"><span class="linenos"> 36</span></a><span class="sd"> 'SELECT tbl.col AS col FROM tbl'</span>
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</span><span id="qualify_columns-37"><a href="#qualify_columns-37"><span class="linenos"> 37</span></a>
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</span><span id="qualify_columns-38"><a href="#qualify_columns-38"><span class="linenos"> 38</span></a><span class="sd"> Args:</span>
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</span><span id="qualify_columns-39"><a href="#qualify_columns-39"><span class="linenos"> 39</span></a><span class="sd"> expression: Expression to qualify.</span>
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</span><span id="qualify_columns-40"><a href="#qualify_columns-40"><span class="linenos"> 40</span></a><span class="sd"> schema: Database schema.</span>
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</span><span id="qualify_columns-41"><a href="#qualify_columns-41"><span class="linenos"> 41</span></a><span class="sd"> expand_alias_refs: Whether to expand references to aliases.</span>
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</span><span id="qualify_columns-42"><a href="#qualify_columns-42"><span class="linenos"> 42</span></a><span class="sd"> expand_stars: Whether to expand star queries. This is a necessary step</span>
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</span><span id="qualify_columns-43"><a href="#qualify_columns-43"><span class="linenos"> 43</span></a><span class="sd"> for most of the optimizer's rules to work; do not set to False unless you</span>
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</span><span id="qualify_columns-44"><a href="#qualify_columns-44"><span class="linenos"> 44</span></a><span class="sd"> know what you're doing!</span>
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</span><span id="qualify_columns-45"><a href="#qualify_columns-45"><span class="linenos"> 45</span></a><span class="sd"> infer_schema: Whether to infer the schema if missing.</span>
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</span><span id="qualify_columns-46"><a href="#qualify_columns-46"><span class="linenos"> 46</span></a><span class="sd"> allow_partial_qualification: Whether to allow partial qualification.</span>
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</span><span id="qualify_columns-47"><a href="#qualify_columns-47"><span class="linenos"> 47</span></a>
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</span><span id="qualify_columns-48"><a href="#qualify_columns-48"><span class="linenos"> 48</span></a><span class="sd"> Returns:</span>
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</span><span id="qualify_columns-49"><a href="#qualify_columns-49"><span class="linenos"> 49</span></a><span class="sd"> The qualified expression.</span>
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</span><span id="qualify_columns-50"><a href="#qualify_columns-50"><span class="linenos"> 50</span></a>
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</span><span id="qualify_columns-51"><a href="#qualify_columns-51"><span class="linenos"> 51</span></a><span class="sd"> Notes:</span>
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</span><span id="qualify_columns-52"><a href="#qualify_columns-52"><span class="linenos"> 52</span></a><span class="sd"> - Currently only handles a single PIVOT or UNPIVOT operator</span>
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</span><span id="qualify_columns-53"><a href="#qualify_columns-53"><span class="linenos"> 53</span></a><span class="sd"> """</span>
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</span><span id="qualify_columns-54"><a href="#qualify_columns-54"><span class="linenos"> 54</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">ensure_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span>
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</span><span id="qualify_columns-55"><a href="#qualify_columns-55"><span class="linenos"> 55</span></a> <span class="n">annotator</span> <span class="o">=</span> <span class="n">TypeAnnotator</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span>
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</span><span id="qualify_columns-56"><a href="#qualify_columns-56"><span class="linenos"> 56</span></a> <span class="n">infer_schema</span> <span class="o">=</span> <span class="n">schema</span><span class="o">.</span><span class="n">empty</span> <span class="k">if</span> <span class="n">infer_schema</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">infer_schema</span>
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</span><span id="qualify_columns-57"><a href="#qualify_columns-57"><span class="linenos"> 57</span></a> <span class="n">dialect</span> <span class="o">=</span> <span class="n">Dialect</span><span class="o">.</span><span class="n">get_or_raise</span><span class="p">(</span><span class="n">schema</span><span class="o">.</span><span class="n">dialect</span><span class="p">)</span>
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</span><span id="qualify_columns-58"><a href="#qualify_columns-58"><span class="linenos"> 58</span></a> <span class="n">pseudocolumns</span> <span class="o">=</span> <span class="n">dialect</span><span class="o">.</span><span class="n">PSEUDOCOLUMNS</span>
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</span><span id="qualify_columns-59"><a href="#qualify_columns-59"><span class="linenos"> 59</span></a> <span class="n">bigquery</span> <span class="o">=</span> <span class="n">dialect</span> <span class="o">==</span> <span class="s2">"bigquery"</span>
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</span><span id="qualify_columns-60"><a href="#qualify_columns-60"><span class="linenos"> 60</span></a>
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</span><span id="qualify_columns-61"><a href="#qualify_columns-61"><span class="linenos"> 61</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>
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</span><span id="qualify_columns-62"><a href="#qualify_columns-62"><span class="linenos"> 62</span></a> <span class="n">scope_expression</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span>
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</span><span id="qualify_columns-63"><a href="#qualify_columns-63"><span class="linenos"> 63</span></a> <span class="n">is_select</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope_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="qualify_columns-64"><a href="#qualify_columns-64"><span class="linenos"> 64</span></a>
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</span><span id="qualify_columns-65"><a href="#qualify_columns-65"><span class="linenos"> 65</span></a> <span class="k">if</span> <span class="n">is_select</span> <span class="ow">and</span> <span class="n">scope_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">"connect"</span><span class="p">):</span>
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</span><span id="qualify_columns-66"><a href="#qualify_columns-66"><span class="linenos"> 66</span></a> <span class="c1"># In Snowflake / Oracle queries that have a CONNECT BY clause, one can use the LEVEL</span>
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</span><span id="qualify_columns-67"><a href="#qualify_columns-67"><span class="linenos"> 67</span></a> <span class="c1"># pseudocolumn, which doesn't belong to a table, so we change it into an identifier</span>
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</span><span id="qualify_columns-68"><a href="#qualify_columns-68"><span class="linenos"> 68</span></a> <span class="n">scope_expression</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span>
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</span><span id="qualify_columns-69"><a href="#qualify_columns-69"><span class="linenos"> 69</span></a> <span class="k">lambda</span> <span class="n">n</span><span class="p">:</span> <span class="n">n</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">n</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="n">n</span><span class="o">.</span><span class="n">name</span> <span class="o">==</span> <span class="s2">"LEVEL"</span> <span class="k">else</span> <span class="n">n</span><span class="p">,</span>
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</span><span id="qualify_columns-70"><a href="#qualify_columns-70"><span class="linenos"> 70</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="qualify_columns-71"><a href="#qualify_columns-71"><span class="linenos"> 71</span></a> <span class="p">)</span>
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</span><span id="qualify_columns-72"><a href="#qualify_columns-72"><span class="linenos"> 72</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span>
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</span><span id="qualify_columns-73"><a href="#qualify_columns-73"><span class="linenos"> 73</span></a>
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</span><span id="qualify_columns-74"><a href="#qualify_columns-74"><span class="linenos"> 74</span></a> <span class="n">resolver</span> <span class="o">=</span> <span class="n">Resolver</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">infer_schema</span><span class="o">=</span><span class="n">infer_schema</span><span class="p">)</span>
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</span><span id="qualify_columns-75"><a href="#qualify_columns-75"><span class="linenos"> 75</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">)</span>
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</span><span id="qualify_columns-76"><a href="#qualify_columns-76"><span class="linenos"> 76</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">)</span>
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</span><span id="qualify_columns-77"><a href="#qualify_columns-77"><span class="linenos"> 77</span></a> <span class="n">using_column_tables</span> <span class="o">=</span> <span class="n">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span>
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</span><span id="qualify_columns-78"><a href="#qualify_columns-78"><span class="linenos"> 78</span></a>
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</span><span id="qualify_columns-79"><a href="#qualify_columns-79"><span class="linenos"> 79</span></a> <span class="k">if</span> <span class="p">(</span><span class="n">schema</span><span class="o">.</span><span class="n">empty</span> <span class="ow">or</span> <span class="n">dialect</span><span class="o">.</span><span class="n">FORCE_EARLY_ALIAS_REF_EXPANSION</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expand_alias_refs</span><span class="p">:</span>
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</span><span id="qualify_columns-80"><a href="#qualify_columns-80"><span class="linenos"> 80</span></a> <span class="n">_expand_alias_refs</span><span class="p">(</span>
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</span><span id="qualify_columns-81"><a href="#qualify_columns-81"><span class="linenos"> 81</span></a> <span class="n">scope</span><span class="p">,</span>
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</span><span id="qualify_columns-82"><a href="#qualify_columns-82"><span class="linenos"> 82</span></a> <span class="n">resolver</span><span class="p">,</span>
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</span><span id="qualify_columns-83"><a href="#qualify_columns-83"><span class="linenos"> 83</span></a> <span class="n">dialect</span><span class="p">,</span>
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</span><span id="qualify_columns-84"><a href="#qualify_columns-84"><span class="linenos"> 84</span></a> <span class="n">expand_only_groupby</span><span class="o">=</span><span class="n">bigquery</span><span class="p">,</span>
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</span><span id="qualify_columns-85"><a href="#qualify_columns-85"><span class="linenos"> 85</span></a> <span class="p">)</span>
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</span><span id="qualify_columns-86"><a href="#qualify_columns-86"><span class="linenos"> 86</span></a>
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</span><span id="qualify_columns-87"><a href="#qualify_columns-87"><span class="linenos"> 87</span></a> <span class="n">_convert_columns_to_dots</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span>
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</span><span id="qualify_columns-88"><a href="#qualify_columns-88"><span class="linenos"> 88</span></a> <span class="n">_qualify_columns</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">,</span> <span class="n">allow_partial_qualification</span><span class="o">=</span><span class="n">allow_partial_qualification</span><span class="p">)</span>
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</span><span id="qualify_columns-89"><a href="#qualify_columns-89"><span class="linenos"> 89</span></a>
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</span><span id="qualify_columns-90"><a href="#qualify_columns-90"><span class="linenos"> 90</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">schema</span><span class="o">.</span><span class="n">empty</span> <span class="ow">and</span> <span class="n">expand_alias_refs</span><span class="p">:</span>
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</span><span id="qualify_columns-91"><a href="#qualify_columns-91"><span class="linenos"> 91</span></a> <span class="n">_expand_alias_refs</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">,</span> <span class="n">dialect</span><span class="p">)</span>
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</span><span id="qualify_columns-92"><a href="#qualify_columns-92"><span class="linenos"> 92</span></a>
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</span><span id="qualify_columns-93"><a href="#qualify_columns-93"><span class="linenos"> 93</span></a> <span class="k">if</span> <span class="n">is_select</span><span class="p">:</span>
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</span><span id="qualify_columns-94"><a href="#qualify_columns-94"><span class="linenos"> 94</span></a> <span class="k">if</span> <span class="n">expand_stars</span><span class="p">:</span>
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</span><span id="qualify_columns-95"><a href="#qualify_columns-95"><span class="linenos"> 95</span></a> <span class="n">_expand_stars</span><span class="p">(</span>
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</span><span id="qualify_columns-96"><a href="#qualify_columns-96"><span class="linenos"> 96</span></a> <span class="n">scope</span><span class="p">,</span>
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</span><span id="qualify_columns-97"><a href="#qualify_columns-97"><span class="linenos"> 97</span></a> <span class="n">resolver</span><span class="p">,</span>
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</span><span id="qualify_columns-98"><a href="#qualify_columns-98"><span class="linenos"> 98</span></a> <span class="n">using_column_tables</span><span class="p">,</span>
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</span><span id="qualify_columns-99"><a href="#qualify_columns-99"><span class="linenos"> 99</span></a> <span class="n">pseudocolumns</span><span class="p">,</span>
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</span><span id="qualify_columns-100"><a href="#qualify_columns-100"><span class="linenos">100</span></a> <span class="n">annotator</span><span class="p">,</span>
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</span><span id="qualify_columns-101"><a href="#qualify_columns-101"><span class="linenos">101</span></a> <span class="p">)</span>
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</span><span id="qualify_columns-102"><a href="#qualify_columns-102"><span class="linenos">102</span></a> <span class="n">qualify_outputs</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span>
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</span><span id="qualify_columns-103"><a href="#qualify_columns-103"><span class="linenos">103</span></a>
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</span><span id="qualify_columns-104"><a href="#qualify_columns-104"><span class="linenos">104</span></a> <span class="n">_expand_group_by</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">dialect</span><span class="p">)</span>
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</span><span id="qualify_columns-105"><a href="#qualify_columns-105"><span class="linenos">105</span></a>
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</span><span id="qualify_columns-106"><a href="#qualify_columns-106"><span class="linenos">106</span></a> <span class="c1"># DISTINCT ON and ORDER BY follow the same rules (tested in DuckDB, Postgres, ClickHouse)</span>
|
|
</span><span id="qualify_columns-107"><a href="#qualify_columns-107"><span class="linenos">107</span></a> <span class="c1"># https://www.postgresql.org/docs/current/sql-select.html#SQL-DISTINCT</span>
|
|
</span><span id="qualify_columns-108"><a href="#qualify_columns-108"><span class="linenos">108</span></a> <span class="n">_expand_order_by_and_distinct_on</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span>
|
|
</span><span id="qualify_columns-109"><a href="#qualify_columns-109"><span class="linenos">109</span></a>
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|
</span><span id="qualify_columns-110"><a href="#qualify_columns-110"><span class="linenos">110</span></a> <span class="k">if</span> <span class="n">bigquery</span><span class="p">:</span>
|
|
</span><span id="qualify_columns-111"><a href="#qualify_columns-111"><span class="linenos">111</span></a> <span class="n">annotator</span><span class="o">.</span><span class="n">annotate_scope</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span>
|
|
</span><span id="qualify_columns-112"><a href="#qualify_columns-112"><span class="linenos">112</span></a>
|
|
</span><span id="qualify_columns-113"><a href="#qualify_columns-113"><span class="linenos">113</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Rewrite sqlglot AST to have fully qualified columns.</p>
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|
|
|
<h6 id="example">Example:</h6>
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|
|
|
<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>
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|
<span class="gp">>>> </span><span class="n">schema</span> <span class="o">=</span> <span class="p">{</span><span class="s2">"tbl"</span><span class="p">:</span> <span class="p">{</span><span class="s2">"col"</span><span class="p">:</span> <span class="s2">"INT"</span><span class="p">}}</span>
|
|
<span class="gp">>>> </span><span class="n">expression</span> <span class="o">=</span> <span class="n"><a href="../../sqlglot.html#parse_one">sqlglot.parse_one</a></span><span class="p">(</span><span class="s2">"SELECT col FROM tbl"</span><span class="p">)</span>
|
|
<span class="gp">>>> </span><span class="n">qualify_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span>
|
|
<span class="go">'SELECT tbl.col AS col FROM tbl'</span>
|
|
</code></pre>
|
|
</div>
|
|
</blockquote>
|
|
|
|
<h6 id="arguments">Arguments:</h6>
|
|
|
|
<ul>
|
|
<li><strong>expression:</strong> Expression to qualify.</li>
|
|
<li><strong>schema:</strong> Database schema.</li>
|
|
<li><strong>expand_alias_refs:</strong> Whether to expand references to aliases.</li>
|
|
<li><strong>expand_stars:</strong> Whether to expand star queries. This is a necessary step
|
|
for most of the optimizer's rules to work; do not set to False unless you
|
|
know what you're doing!</li>
|
|
<li><strong>infer_schema:</strong> Whether to infer the schema if missing.</li>
|
|
<li><strong>allow_partial_qualification:</strong> Whether to allow partial qualification.</li>
|
|
</ul>
|
|
|
|
<h6 id="returns">Returns:</h6>
|
|
|
|
<blockquote>
|
|
<p>The qualified expression.</p>
|
|
</blockquote>
|
|
|
|
<h6 id="notes">Notes:</h6>
|
|
|
|
<blockquote>
|
|
<ul>
|
|
<li>Currently only handles a single PIVOT or UNPIVOT operator</li>
|
|
</ul>
|
|
</blockquote>
|
|
</div>
|
|
|
|
|
|
</section>
|
|
<section id="validate_qualify_columns">
|
|
<input id="validate_qualify_columns-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">validate_qualify_columns</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>
|
|
|
|
<label class="view-source-button" for="validate_qualify_columns-view-source"><span>View Source</span></label>
|
|
|
|
</div>
|
|
<a class="headerlink" href="#validate_qualify_columns"></a>
|
|
<div class="pdoc-code codehilite"><pre><span></span><span id="validate_qualify_columns-116"><a href="#validate_qualify_columns-116"><span class="linenos">116</span></a><span class="k">def</span><span class="w"> </span><span class="nf">validate_qualify_columns</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="validate_qualify_columns-117"><a href="#validate_qualify_columns-117"><span class="linenos">117</span></a><span class="w"> </span><span class="sd">"""Raise an `OptimizeError` if any columns aren't qualified"""</span>
|
|
</span><span id="validate_qualify_columns-118"><a href="#validate_qualify_columns-118"><span class="linenos">118</span></a> <span class="n">all_unqualified_columns</span> <span class="o">=</span> <span class="p">[]</span>
|
|
</span><span id="validate_qualify_columns-119"><a href="#validate_qualify_columns-119"><span class="linenos">119</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="validate_qualify_columns-120"><a href="#validate_qualify_columns-120"><span class="linenos">120</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</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">Select</span><span class="p">):</span>
|
|
</span><span id="validate_qualify_columns-121"><a href="#validate_qualify_columns-121"><span class="linenos">121</span></a> <span class="n">unqualified_columns</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">unqualified_columns</span>
|
|
</span><span id="validate_qualify_columns-122"><a href="#validate_qualify_columns-122"><span class="linenos">122</span></a>
|
|
</span><span id="validate_qualify_columns-123"><a href="#validate_qualify_columns-123"><span class="linenos">123</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_correlated_subquery</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">:</span>
|
|
</span><span id="validate_qualify_columns-124"><a href="#validate_qualify_columns-124"><span class="linenos">124</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
|
|
</span><span id="validate_qualify_columns-125"><a href="#validate_qualify_columns-125"><span class="linenos">125</span></a> <span class="n">for_table</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">" for table: '</span><span class="si">{</span><span class="n">column</span><span class="o">.</span><span class="n">table</span><span class="si">}</span><span class="s2">'"</span> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="k">else</span> <span class="s2">""</span>
|
|
</span><span id="validate_qualify_columns-126"><a href="#validate_qualify_columns-126"><span class="linenos">126</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Column '</span><span class="si">{</span><span class="n">column</span><span class="si">}</span><span class="s2">' could not be resolved</span><span class="si">{</span><span class="n">for_table</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
|
|
</span><span id="validate_qualify_columns-127"><a href="#validate_qualify_columns-127"><span class="linenos">127</span></a>
|
|
</span><span id="validate_qualify_columns-128"><a href="#validate_qualify_columns-128"><span class="linenos">128</span></a> <span class="k">if</span> <span class="n">unqualified_columns</span> <span class="ow">and</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span> <span class="ow">and</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">unpivot</span><span class="p">:</span>
|
|
</span><span id="validate_qualify_columns-129"><a href="#validate_qualify_columns-129"><span class="linenos">129</span></a> <span class="c1"># New columns produced by the UNPIVOT can't be qualified, but there may be columns</span>
|
|
</span><span id="validate_qualify_columns-130"><a href="#validate_qualify_columns-130"><span class="linenos">130</span></a> <span class="c1"># under the UNPIVOT's IN clause that can and should be qualified. We recompute</span>
|
|
</span><span id="validate_qualify_columns-131"><a href="#validate_qualify_columns-131"><span class="linenos">131</span></a> <span class="c1"># this list here to ensure those in the former category will be excluded.</span>
|
|
</span><span id="validate_qualify_columns-132"><a href="#validate_qualify_columns-132"><span class="linenos">132</span></a> <span class="n">unpivot_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">_unpivot_columns</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]))</span>
|
|
</span><span id="validate_qualify_columns-133"><a href="#validate_qualify_columns-133"><span class="linenos">133</span></a> <span class="n">unqualified_columns</span> <span class="o">=</span> <span class="p">[</span><span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">unqualified_columns</span> <span class="k">if</span> <span class="n">c</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">unpivot_columns</span><span class="p">]</span>
|
|
</span><span id="validate_qualify_columns-134"><a href="#validate_qualify_columns-134"><span class="linenos">134</span></a>
|
|
</span><span id="validate_qualify_columns-135"><a href="#validate_qualify_columns-135"><span class="linenos">135</span></a> <span class="n">all_unqualified_columns</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">unqualified_columns</span><span class="p">)</span>
|
|
</span><span id="validate_qualify_columns-136"><a href="#validate_qualify_columns-136"><span class="linenos">136</span></a>
|
|
</span><span id="validate_qualify_columns-137"><a href="#validate_qualify_columns-137"><span class="linenos">137</span></a> <span class="k">if</span> <span class="n">all_unqualified_columns</span><span class="p">:</span>
|
|
</span><span id="validate_qualify_columns-138"><a href="#validate_qualify_columns-138"><span class="linenos">138</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous columns: </span><span class="si">{</span><span class="n">all_unqualified_columns</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
|
|
</span><span id="validate_qualify_columns-139"><a href="#validate_qualify_columns-139"><span class="linenos">139</span></a>
|
|
</span><span id="validate_qualify_columns-140"><a href="#validate_qualify_columns-140"><span class="linenos">140</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Raise an <code>OptimizeError</code> if any columns aren't qualified</p>
|
|
</div>
|
|
|
|
|
|
</section>
|
|
<section id="qualify_outputs">
|
|
<input id="qualify_outputs-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">qualify_outputs</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">scope_or_expression</span><span class="p">:</span> <span class="n"><a href="scope.html#Scope">sqlglot.optimizer.scope.Scope</a></span> <span class="o">|</span> <span class="n"><a href="../expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="kc">None</span>:</span></span>
|
|
|
|
<label class="view-source-button" for="qualify_outputs-view-source"><span>View Source</span></label>
|
|
|
|
</div>
|
|
<a class="headerlink" href="#qualify_outputs"></a>
|
|
<div class="pdoc-code codehilite"><pre><span></span><span id="qualify_outputs-761"><a href="#qualify_outputs-761"><span class="linenos">761</span></a><span class="k">def</span><span class="w"> </span><span class="nf">qualify_outputs</span><span class="p">(</span><span class="n">scope_or_expression</span><span class="p">:</span> <span class="n">Scope</span> <span class="o">|</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="qualify_outputs-762"><a href="#qualify_outputs-762"><span class="linenos">762</span></a><span class="w"> </span><span class="sd">"""Ensure all output columns are aliased"""</span>
|
|
</span><span id="qualify_outputs-763"><a href="#qualify_outputs-763"><span class="linenos">763</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope_or_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="qualify_outputs-764"><a href="#qualify_outputs-764"><span class="linenos">764</span></a> <span class="n">scope</span> <span class="o">=</span> <span class="n">build_scope</span><span class="p">(</span><span class="n">scope_or_expression</span><span class="p">)</span>
|
|
</span><span id="qualify_outputs-765"><a href="#qualify_outputs-765"><span class="linenos">765</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span>
|
|
</span><span id="qualify_outputs-766"><a href="#qualify_outputs-766"><span class="linenos">766</span></a> <span class="k">return</span>
|
|
</span><span id="qualify_outputs-767"><a href="#qualify_outputs-767"><span class="linenos">767</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="qualify_outputs-768"><a href="#qualify_outputs-768"><span class="linenos">768</span></a> <span class="n">scope</span> <span class="o">=</span> <span class="n">scope_or_expression</span>
|
|
</span><span id="qualify_outputs-769"><a href="#qualify_outputs-769"><span class="linenos">769</span></a>
|
|
</span><span id="qualify_outputs-770"><a href="#qualify_outputs-770"><span class="linenos">770</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span>
|
|
</span><span id="qualify_outputs-771"><a href="#qualify_outputs-771"><span class="linenos">771</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">aliased_column</span><span class="p">)</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span>
|
|
</span><span id="qualify_outputs-772"><a href="#qualify_outputs-772"><span class="linenos">772</span></a> <span class="n">itertools</span><span class="o">.</span><span class="n">zip_longest</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">outer_columns</span><span class="p">)</span>
|
|
</span><span id="qualify_outputs-773"><a href="#qualify_outputs-773"><span class="linenos">773</span></a> <span class="p">):</span>
|
|
</span><span id="qualify_outputs-774"><a href="#qualify_outputs-774"><span class="linenos">774</span></a> <span class="k">if</span> <span class="n">selection</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="qualify_outputs-775"><a href="#qualify_outputs-775"><span class="linenos">775</span></a> <span class="k">break</span>
|
|
</span><span id="qualify_outputs-776"><a href="#qualify_outputs-776"><span class="linenos">776</span></a>
|
|
</span><span id="qualify_outputs-777"><a href="#qualify_outputs-777"><span class="linenos">777</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span>
|
|
</span><span id="qualify_outputs-778"><a href="#qualify_outputs-778"><span class="linenos">778</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">selection</span><span class="o">.</span><span class="n">output_name</span><span class="p">:</span>
|
|
</span><span id="qualify_outputs-779"><a href="#qualify_outputs-779"><span class="linenos">779</span></a> <span class="n">selection</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">TableAlias</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">to_identifier</span><span class="p">(</span><span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">)))</span>
|
|
</span><span id="qualify_outputs-780"><a href="#qualify_outputs-780"><span class="linenos">780</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">selection</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="ow">and</span> <span class="ow">not</span> <span class="n">selection</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span>
|
|
</span><span id="qualify_outputs-781"><a href="#qualify_outputs-781"><span class="linenos">781</span></a> <span class="n">selection</span> <span class="o">=</span> <span class="n">alias</span><span class="p">(</span>
|
|
</span><span id="qualify_outputs-782"><a href="#qualify_outputs-782"><span class="linenos">782</span></a> <span class="n">selection</span><span class="p">,</span>
|
|
</span><span id="qualify_outputs-783"><a href="#qualify_outputs-783"><span class="linenos">783</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">selection</span><span class="o">.</span><span class="n">output_name</span> <span class="ow">or</span> <span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">,</span>
|
|
</span><span id="qualify_outputs-784"><a href="#qualify_outputs-784"><span class="linenos">784</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
|
|
</span><span id="qualify_outputs-785"><a href="#qualify_outputs-785"><span class="linenos">785</span></a> <span class="p">)</span>
|
|
</span><span id="qualify_outputs-786"><a href="#qualify_outputs-786"><span class="linenos">786</span></a> <span class="k">if</span> <span class="n">aliased_column</span><span class="p">:</span>
|
|
</span><span id="qualify_outputs-787"><a href="#qualify_outputs-787"><span class="linenos">787</span></a> <span class="n">selection</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">aliased_column</span><span class="p">))</span>
|
|
</span><span id="qualify_outputs-788"><a href="#qualify_outputs-788"><span class="linenos">788</span></a>
|
|
</span><span id="qualify_outputs-789"><a href="#qualify_outputs-789"><span class="linenos">789</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">selection</span><span class="p">)</span>
|
|
</span><span id="qualify_outputs-790"><a href="#qualify_outputs-790"><span class="linenos">790</span></a>
|
|
</span><span id="qualify_outputs-791"><a href="#qualify_outputs-791"><span class="linenos">791</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</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">Select</span><span class="p">):</span>
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|
</span><span id="qualify_outputs-792"><a href="#qualify_outputs-792"><span class="linenos">792</span></a> <span class="n">scope</span><span class="o">.</span><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">new_selections</span><span class="p">)</span>
|
|
</span></pre></div>
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<div class="docstring"><p>Ensure all output columns are aliased</p>
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</div>
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</section>
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<section id="quote_identifiers">
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<input id="quote_identifiers-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>
|
|
<span class="name">quote_identifiers</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="o">~</span><span class="n">E</span>,</span><span class="param"> <span class="n">dialect</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n"><a href="../dialects.html#Dialect">sqlglot.dialects.Dialect</a></span><span class="p">,</span> <span class="n">Type</span><span class="p">[</span><span class="n"><a href="../dialects.html#Dialect">sqlglot.dialects.Dialect</a></span><span class="p">],</span> <span class="n">NoneType</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">identify</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="o">~</span><span class="n">E</span>:</span></span>
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<label class="view-source-button" for="quote_identifiers-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#quote_identifiers"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="quote_identifiers-795"><a href="#quote_identifiers-795"><span class="linenos">795</span></a><span class="k">def</span><span class="w"> </span><span class="nf">quote_identifiers</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="n">dialect</span><span class="p">:</span> <span class="n">DialectType</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">identify</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
|
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</span><span id="quote_identifiers-796"><a href="#quote_identifiers-796"><span class="linenos">796</span></a><span class="w"> </span><span class="sd">"""Makes sure all identifiers that need to be quoted are quoted."""</span>
|
|
</span><span id="quote_identifiers-797"><a href="#quote_identifiers-797"><span class="linenos">797</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span>
|
|
</span><span id="quote_identifiers-798"><a href="#quote_identifiers-798"><span class="linenos">798</span></a> <span class="n">Dialect</span><span class="o">.</span><span class="n">get_or_raise</span><span class="p">(</span><span class="n">dialect</span><span class="p">)</span><span class="o">.</span><span class="n">quote_identifier</span><span class="p">,</span> <span class="n">identify</span><span class="o">=</span><span class="n">identify</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span>
|
|
</span><span id="quote_identifiers-799"><a href="#quote_identifiers-799"><span class="linenos">799</span></a> <span class="p">)</span> <span class="c1"># type: ignore</span>
|
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</span></pre></div>
|
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|
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|
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<div class="docstring"><p>Makes sure all identifiers that need to be quoted are quoted.</p>
|
|
</div>
|
|
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</section>
|
|
<section id="pushdown_cte_alias_columns">
|
|
<input id="pushdown_cte_alias_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>
|
|
<span class="name">pushdown_cte_alias_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>
|
|
|
|
<label class="view-source-button" for="pushdown_cte_alias_columns-view-source"><span>View Source</span></label>
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|
|
|
</div>
|
|
<a class="headerlink" href="#pushdown_cte_alias_columns"></a>
|
|
<div class="pdoc-code codehilite"><pre><span></span><span id="pushdown_cte_alias_columns-802"><a href="#pushdown_cte_alias_columns-802"><span class="linenos">802</span></a><span class="k">def</span><span class="w"> </span><span class="nf">pushdown_cte_alias_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="pushdown_cte_alias_columns-803"><a href="#pushdown_cte_alias_columns-803"><span class="linenos">803</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="pushdown_cte_alias_columns-804"><a href="#pushdown_cte_alias_columns-804"><span class="linenos">804</span></a><span class="sd"> Pushes down the CTE alias columns into the projection,</span>
|
|
</span><span id="pushdown_cte_alias_columns-805"><a href="#pushdown_cte_alias_columns-805"><span class="linenos">805</span></a>
|
|
</span><span id="pushdown_cte_alias_columns-806"><a href="#pushdown_cte_alias_columns-806"><span class="linenos">806</span></a><span class="sd"> This step is useful in Snowflake where the CTE alias columns can be referenced in the HAVING.</span>
|
|
</span><span id="pushdown_cte_alias_columns-807"><a href="#pushdown_cte_alias_columns-807"><span class="linenos">807</span></a>
|
|
</span><span id="pushdown_cte_alias_columns-808"><a href="#pushdown_cte_alias_columns-808"><span class="linenos">808</span></a><span class="sd"> Example:</span>
|
|
</span><span id="pushdown_cte_alias_columns-809"><a href="#pushdown_cte_alias_columns-809"><span class="linenos">809</span></a><span class="sd"> >>> import sqlglot</span>
|
|
</span><span id="pushdown_cte_alias_columns-810"><a href="#pushdown_cte_alias_columns-810"><span class="linenos">810</span></a><span class="sd"> >>> expression = sqlglot.parse_one("WITH y (c) AS (SELECT SUM(a) FROM ( SELECT 1 a ) AS x HAVING c > 0) SELECT c FROM y")</span>
|
|
</span><span id="pushdown_cte_alias_columns-811"><a href="#pushdown_cte_alias_columns-811"><span class="linenos">811</span></a><span class="sd"> >>> pushdown_cte_alias_columns(expression).sql()</span>
|
|
</span><span id="pushdown_cte_alias_columns-812"><a href="#pushdown_cte_alias_columns-812"><span class="linenos">812</span></a><span class="sd"> 'WITH y(c) AS (SELECT SUM(a) AS c FROM (SELECT 1 AS a) AS x HAVING c > 0) SELECT c FROM y'</span>
|
|
</span><span id="pushdown_cte_alias_columns-813"><a href="#pushdown_cte_alias_columns-813"><span class="linenos">813</span></a>
|
|
</span><span id="pushdown_cte_alias_columns-814"><a href="#pushdown_cte_alias_columns-814"><span class="linenos">814</span></a><span class="sd"> Args:</span>
|
|
</span><span id="pushdown_cte_alias_columns-815"><a href="#pushdown_cte_alias_columns-815"><span class="linenos">815</span></a><span class="sd"> expression: Expression to pushdown.</span>
|
|
</span><span id="pushdown_cte_alias_columns-816"><a href="#pushdown_cte_alias_columns-816"><span class="linenos">816</span></a>
|
|
</span><span id="pushdown_cte_alias_columns-817"><a href="#pushdown_cte_alias_columns-817"><span class="linenos">817</span></a><span class="sd"> Returns:</span>
|
|
</span><span id="pushdown_cte_alias_columns-818"><a href="#pushdown_cte_alias_columns-818"><span class="linenos">818</span></a><span class="sd"> The expression with the CTE aliases pushed down into the projection.</span>
|
|
</span><span id="pushdown_cte_alias_columns-819"><a href="#pushdown_cte_alias_columns-819"><span class="linenos">819</span></a><span class="sd"> """</span>
|
|
</span><span id="pushdown_cte_alias_columns-820"><a href="#pushdown_cte_alias_columns-820"><span class="linenos">820</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">find_all</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="pushdown_cte_alias_columns-821"><a href="#pushdown_cte_alias_columns-821"><span class="linenos">821</span></a> <span class="k">if</span> <span class="n">cte</span><span class="o">.</span><span class="n">alias_column_names</span><span class="p">:</span>
|
|
</span><span id="pushdown_cte_alias_columns-822"><a href="#pushdown_cte_alias_columns-822"><span class="linenos">822</span></a> <span class="n">new_expressions</span> <span class="o">=</span> <span class="p">[]</span>
|
|
</span><span id="pushdown_cte_alias_columns-823"><a href="#pushdown_cte_alias_columns-823"><span class="linenos">823</span></a> <span class="k">for</span> <span class="n">_alias</span><span class="p">,</span> <span class="n">projection</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">cte</span><span class="o">.</span><span class="n">alias_column_names</span><span class="p">,</span> <span class="n">cte</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="pushdown_cte_alias_columns-824"><a href="#pushdown_cte_alias_columns-824"><span class="linenos">824</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">projection</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="pushdown_cte_alias_columns-825"><a href="#pushdown_cte_alias_columns-825"><span class="linenos">825</span></a> <span class="n">projection</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">_alias</span><span class="p">)</span>
|
|
</span><span id="pushdown_cte_alias_columns-826"><a href="#pushdown_cte_alias_columns-826"><span class="linenos">826</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="pushdown_cte_alias_columns-827"><a href="#pushdown_cte_alias_columns-827"><span class="linenos">827</span></a> <span class="n">projection</span> <span class="o">=</span> <span class="n">alias</span><span class="p">(</span><span class="n">projection</span><span class="p">,</span> <span class="n">alias</span><span class="o">=</span><span class="n">_alias</span><span class="p">)</span>
|
|
</span><span id="pushdown_cte_alias_columns-828"><a href="#pushdown_cte_alias_columns-828"><span class="linenos">828</span></a> <span class="n">new_expressions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">projection</span><span class="p">)</span>
|
|
</span><span id="pushdown_cte_alias_columns-829"><a href="#pushdown_cte_alias_columns-829"><span class="linenos">829</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">this</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">new_expressions</span><span class="p">)</span>
|
|
</span><span id="pushdown_cte_alias_columns-830"><a href="#pushdown_cte_alias_columns-830"><span class="linenos">830</span></a>
|
|
</span><span id="pushdown_cte_alias_columns-831"><a href="#pushdown_cte_alias_columns-831"><span class="linenos">831</span></a> <span class="k">return</span> <span class="n">expression</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Pushes down the CTE alias columns into the projection,</p>
|
|
|
|
<p>This step is useful in Snowflake where the CTE alias columns can be referenced in the HAVING.</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">expression</span> <span class="o">=</span> <span class="n"><a href="../../sqlglot.html#parse_one">sqlglot.parse_one</a></span><span class="p">(</span><span class="s2">"WITH y (c) AS (SELECT SUM(a) FROM ( SELECT 1 a ) AS x HAVING c > 0) SELECT c FROM y"</span><span class="p">)</span>
|
|
<span class="gp">>>> </span><span class="n">pushdown_cte_alias_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span>
|
|
<span class="go">'WITH y(c) AS (SELECT SUM(a) AS c FROM (SELECT 1 AS a) AS x HAVING c > 0) SELECT c FROM y'</span>
|
|
</code></pre>
|
|
</div>
|
|
</blockquote>
|
|
|
|
<h6 id="arguments">Arguments:</h6>
|
|
|
|
<ul>
|
|
<li><strong>expression:</strong> Expression to pushdown.</li>
|
|
</ul>
|
|
|
|
<h6 id="returns">Returns:</h6>
|
|
|
|
<blockquote>
|
|
<p>The expression with the CTE aliases pushed down into the projection.</p>
|
|
</blockquote>
|
|
</div>
|
|
|
|
|
|
</section>
|
|
<section id="Resolver">
|
|
<input id="Resolver-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
|
<div class="attr class">
|
|
|
|
<span class="def">class</span>
|
|
<span class="name">Resolver</span>:
|
|
|
|
<label class="view-source-button" for="Resolver-view-source"><span>View Source</span></label>
|
|
|
|
</div>
|
|
<a class="headerlink" href="#Resolver"></a>
|
|
<div class="pdoc-code codehilite"><pre><span></span><span id="Resolver-834"><a href="#Resolver-834"><span class="linenos"> 834</span></a><span class="k">class</span><span class="w"> </span><span class="nc">Resolver</span><span class="p">:</span>
|
|
</span><span id="Resolver-835"><a href="#Resolver-835"><span class="linenos"> 835</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="Resolver-836"><a href="#Resolver-836"><span class="linenos"> 836</span></a><span class="sd"> Helper for resolving columns.</span>
|
|
</span><span id="Resolver-837"><a href="#Resolver-837"><span class="linenos"> 837</span></a>
|
|
</span><span id="Resolver-838"><a href="#Resolver-838"><span class="linenos"> 838</span></a><span class="sd"> This is a class so we can lazily load some things and easily share them across functions.</span>
|
|
</span><span id="Resolver-839"><a href="#Resolver-839"><span class="linenos"> 839</span></a><span class="sd"> """</span>
|
|
</span><span id="Resolver-840"><a href="#Resolver-840"><span class="linenos"> 840</span></a>
|
|
</span><span id="Resolver-841"><a href="#Resolver-841"><span class="linenos"> 841</span></a> <span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">:</span> <span class="n">Schema</span><span class="p">,</span> <span class="n">infer_schema</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="Resolver-842"><a href="#Resolver-842"><span class="linenos"> 842</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span> <span class="o">=</span> <span class="n">scope</span>
|
|
</span><span id="Resolver-843"><a href="#Resolver-843"><span class="linenos"> 843</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">schema</span>
|
|
</span><span id="Resolver-844"><a href="#Resolver-844"><span class="linenos"> 844</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</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">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]]]</span> <span class="o">=</span> <span class="kc">None</span>
|
|
</span><span id="Resolver-845"><a href="#Resolver-845"><span class="linenos"> 845</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Mapping</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span>
|
|
</span><span id="Resolver-846"><a href="#Resolver-846"><span class="linenos"> 846</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</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="o">=</span> <span class="kc">None</span>
|
|
</span><span id="Resolver-847"><a href="#Resolver-847"><span class="linenos"> 847</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_infer_schema</span> <span class="o">=</span> <span class="n">infer_schema</span>
|
|
</span><span id="Resolver-848"><a href="#Resolver-848"><span class="linenos"> 848</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_source_columns_cache</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="n">t</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">bool</span><span class="p">],</span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="p">{}</span>
|
|
</span><span id="Resolver-849"><a href="#Resolver-849"><span class="linenos"> 849</span></a>
|
|
</span><span id="Resolver-850"><a href="#Resolver-850"><span class="linenos"> 850</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">get_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</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="Resolver-851"><a href="#Resolver-851"><span class="linenos"> 851</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="Resolver-852"><a href="#Resolver-852"><span class="linenos"> 852</span></a><span class="sd"> Get the table for a column name.</span>
|
|
</span><span id="Resolver-853"><a href="#Resolver-853"><span class="linenos"> 853</span></a>
|
|
</span><span id="Resolver-854"><a href="#Resolver-854"><span class="linenos"> 854</span></a><span class="sd"> Args:</span>
|
|
</span><span id="Resolver-855"><a href="#Resolver-855"><span class="linenos"> 855</span></a><span class="sd"> column_name: The column name to find the table for.</span>
|
|
</span><span id="Resolver-856"><a href="#Resolver-856"><span class="linenos"> 856</span></a><span class="sd"> Returns:</span>
|
|
</span><span id="Resolver-857"><a href="#Resolver-857"><span class="linenos"> 857</span></a><span class="sd"> The table name if it can be found/inferred.</span>
|
|
</span><span id="Resolver-858"><a href="#Resolver-858"><span class="linenos"> 858</span></a><span class="sd"> """</span>
|
|
</span><span id="Resolver-859"><a href="#Resolver-859"><span class="linenos"> 859</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="Resolver-860"><a href="#Resolver-860"><span class="linenos"> 860</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_unambiguous_columns</span><span class="p">(</span>
|
|
</span><span id="Resolver-861"><a href="#Resolver-861"><span class="linenos"> 861</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span>
|
|
</span><span id="Resolver-862"><a href="#Resolver-862"><span class="linenos"> 862</span></a> <span class="p">)</span>
|
|
</span><span id="Resolver-863"><a href="#Resolver-863"><span class="linenos"> 863</span></a>
|
|
</span><span id="Resolver-864"><a href="#Resolver-864"><span class="linenos"> 864</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span>
|
|
</span><span id="Resolver-865"><a href="#Resolver-865"><span class="linenos"> 865</span></a>
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|
</span><span id="Resolver-866"><a href="#Resolver-866"><span class="linenos"> 866</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_name</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_infer_schema</span><span class="p">:</span>
|
|
</span><span id="Resolver-867"><a href="#Resolver-867"><span class="linenos"> 867</span></a> <span class="n">sources_without_schema</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span>
|
|
</span><span id="Resolver-868"><a href="#Resolver-868"><span class="linenos"> 868</span></a> <span class="n">source</span>
|
|
</span><span id="Resolver-869"><a href="#Resolver-869"><span class="linenos"> 869</span></a> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span>
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|
</span><span id="Resolver-870"><a href="#Resolver-870"><span class="linenos"> 870</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span>
|
|
</span><span id="Resolver-871"><a href="#Resolver-871"><span class="linenos"> 871</span></a> <span class="p">)</span>
|
|
</span><span id="Resolver-872"><a href="#Resolver-872"><span class="linenos"> 872</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
|
|
</span><span id="Resolver-873"><a href="#Resolver-873"><span class="linenos"> 873</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
|
|
</span><span id="Resolver-874"><a href="#Resolver-874"><span class="linenos"> 874</span></a>
|
|
</span><span id="Resolver-875"><a href="#Resolver-875"><span class="linenos"> 875</span></a> <span class="k">if</span> <span class="n">table_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span>
|
|
</span><span id="Resolver-876"><a href="#Resolver-876"><span class="linenos"> 876</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span>
|
|
</span><span id="Resolver-877"><a href="#Resolver-877"><span class="linenos"> 877</span></a>
|
|
</span><span id="Resolver-878"><a href="#Resolver-878"><span class="linenos"> 878</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span>
|
|
</span><span id="Resolver-879"><a href="#Resolver-879"><span class="linenos"> 879</span></a>
|
|
</span><span id="Resolver-880"><a href="#Resolver-880"><span class="linenos"> 880</span></a> <span class="k">if</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">Query</span><span class="p">):</span>
|
|
</span><span id="Resolver-881"><a href="#Resolver-881"><span class="linenos"> 881</span></a> <span class="k">while</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">alias</span> <span class="o">!=</span> <span class="n">table_name</span><span class="p">:</span>
|
|
</span><span id="Resolver-882"><a href="#Resolver-882"><span class="linenos"> 882</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">parent</span>
|
|
</span><span id="Resolver-883"><a href="#Resolver-883"><span class="linenos"> 883</span></a>
|
|
</span><span id="Resolver-884"><a href="#Resolver-884"><span class="linenos"> 884</span></a> <span class="n">node_alias</span> <span class="o">=</span> <span class="n">node</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="Resolver-885"><a href="#Resolver-885"><span class="linenos"> 885</span></a> <span class="k">if</span> <span class="n">node_alias</span><span class="p">:</span>
|
|
</span><span id="Resolver-886"><a href="#Resolver-886"><span class="linenos"> 886</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">node_alias</span><span class="o">.</span><span class="n">this</span><span class="p">)</span>
|
|
</span><span id="Resolver-887"><a href="#Resolver-887"><span class="linenos"> 887</span></a>
|
|
</span><span id="Resolver-888"><a href="#Resolver-888"><span class="linenos"> 888</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span>
|
|
</span><span id="Resolver-889"><a href="#Resolver-889"><span class="linenos"> 889</span></a>
|
|
</span><span id="Resolver-890"><a href="#Resolver-890"><span class="linenos"> 890</span></a> <span class="nd">@property</span>
|
|
</span><span id="Resolver-891"><a href="#Resolver-891"><span class="linenos"> 891</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">all_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></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><span id="Resolver-892"><a href="#Resolver-892"><span class="linenos"> 892</span></a><span class="w"> </span><span class="sd">"""All available columns of all sources in this scope"""</span>
|
|
</span><span id="Resolver-893"><a href="#Resolver-893"><span class="linenos"> 893</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="Resolver-894"><a href="#Resolver-894"><span class="linenos"> 894</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="p">{</span>
|
|
</span><span id="Resolver-895"><a href="#Resolver-895"><span class="linenos"> 895</span></a> <span class="n">column</span> <span class="k">for</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span>
|
|
</span><span id="Resolver-896"><a href="#Resolver-896"><span class="linenos"> 896</span></a> <span class="p">}</span>
|
|
</span><span id="Resolver-897"><a href="#Resolver-897"><span class="linenos"> 897</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span>
|
|
</span><span id="Resolver-898"><a href="#Resolver-898"><span class="linenos"> 898</span></a>
|
|
</span><span id="Resolver-899"><a href="#Resolver-899"><span class="linenos"> 899</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</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="n">only_visible</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span>
|
|
</span><span id="Resolver-900"><a href="#Resolver-900"><span class="linenos"> 900</span></a><span class="w"> </span><span class="sd">"""Resolve the source columns for a given source `name`."""</span>
|
|
</span><span id="Resolver-901"><a href="#Resolver-901"><span class="linenos"> 901</span></a> <span class="n">cache_key</span> <span class="o">=</span> <span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span>
|
|
</span><span id="Resolver-902"><a href="#Resolver-902"><span class="linenos"> 902</span></a> <span class="k">if</span> <span class="n">cache_key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_source_columns_cache</span><span class="p">:</span>
|
|
</span><span id="Resolver-903"><a href="#Resolver-903"><span class="linenos"> 903</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span>
|
|
</span><span id="Resolver-904"><a href="#Resolver-904"><span class="linenos"> 904</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
|
|
</span><span id="Resolver-905"><a href="#Resolver-905"><span class="linenos"> 905</span></a>
|
|
</span><span id="Resolver-906"><a href="#Resolver-906"><span class="linenos"> 906</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span>
|
|
</span><span id="Resolver-907"><a href="#Resolver-907"><span class="linenos"> 907</span></a>
|
|
</span><span id="Resolver-908"><a href="#Resolver-908"><span class="linenos"> 908</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span>
|
|
</span><span id="Resolver-909"><a href="#Resolver-909"><span class="linenos"> 909</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span>
|
|
</span><span id="Resolver-910"><a href="#Resolver-910"><span class="linenos"> 910</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span>
|
|
</span><span id="Resolver-911"><a href="#Resolver-911"><span class="linenos"> 911</span></a> <span class="n">source</span><span class="o">.</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">Values</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="Resolver-912"><a href="#Resolver-912"><span class="linenos"> 912</span></a> <span class="p">):</span>
|
|
</span><span id="Resolver-913"><a href="#Resolver-913"><span class="linenos"> 913</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span>
|
|
</span><span id="Resolver-914"><a href="#Resolver-914"><span class="linenos"> 914</span></a>
|
|
</span><span id="Resolver-915"><a href="#Resolver-915"><span class="linenos"> 915</span></a> <span class="c1"># in bigquery, unnest structs are automatically scoped as tables, so you can</span>
|
|
</span><span id="Resolver-916"><a href="#Resolver-916"><span class="linenos"> 916</span></a> <span class="c1"># directly select a struct field in a query.</span>
|
|
</span><span id="Resolver-917"><a href="#Resolver-917"><span class="linenos"> 917</span></a> <span class="c1"># this handles the case where the unnest is statically defined.</span>
|
|
</span><span id="Resolver-918"><a href="#Resolver-918"><span class="linenos"> 918</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">dialect</span> <span class="o">==</span> <span class="s2">"bigquery"</span><span class="p">:</span>
|
|
</span><span id="Resolver-919"><a href="#Resolver-919"><span class="linenos"> 919</span></a> <span class="k">if</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</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">STRUCT</span><span class="p">):</span>
|
|
</span><span id="Resolver-920"><a href="#Resolver-920"><span class="linenos"> 920</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> <span class="c1"># type: ignore</span>
|
|
</span><span id="Resolver-921"><a href="#Resolver-921"><span class="linenos"> 921</span></a> <span class="n">columns</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">k</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
|
|
</span><span id="Resolver-922"><a href="#Resolver-922"><span class="linenos"> 922</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</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">SetOperation</span><span class="p">):</span>
|
|
</span><span id="Resolver-923"><a href="#Resolver-923"><span class="linenos"> 923</span></a> <span class="n">set_op</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span>
|
|
</span><span id="Resolver-924"><a href="#Resolver-924"><span class="linenos"> 924</span></a>
|
|
</span><span id="Resolver-925"><a href="#Resolver-925"><span class="linenos"> 925</span></a> <span class="c1"># BigQuery specific set operations modifiers, e.g INNER UNION ALL BY NAME</span>
|
|
</span><span id="Resolver-926"><a href="#Resolver-926"><span class="linenos"> 926</span></a> <span class="n">on_column_list</span> <span class="o">=</span> <span class="n">set_op</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><span id="Resolver-927"><a href="#Resolver-927"><span class="linenos"> 927</span></a>
|
|
</span><span id="Resolver-928"><a href="#Resolver-928"><span class="linenos"> 928</span></a> <span class="k">if</span> <span class="n">on_column_list</span><span class="p">:</span>
|
|
</span><span id="Resolver-929"><a href="#Resolver-929"><span class="linenos"> 929</span></a> <span class="c1"># The resulting columns are the columns in the ON clause:</span>
|
|
</span><span id="Resolver-930"><a href="#Resolver-930"><span class="linenos"> 930</span></a> <span class="c1"># {INNER | LEFT | FULL} UNION ALL BY NAME ON (col1, col2, ...)</span>
|
|
</span><span id="Resolver-931"><a href="#Resolver-931"><span class="linenos"> 931</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">[</span><span class="n">col</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">on_column_list</span><span class="p">]</span>
|
|
</span><span id="Resolver-932"><a href="#Resolver-932"><span class="linenos"> 932</span></a> <span class="k">elif</span> <span class="n">set_op</span><span class="o">.</span><span class="n">side</span> <span class="ow">or</span> <span class="n">set_op</span><span class="o">.</span><span class="n">kind</span><span class="p">:</span>
|
|
</span><span id="Resolver-933"><a href="#Resolver-933"><span class="linenos"> 933</span></a> <span class="n">side</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">side</span>
|
|
</span><span id="Resolver-934"><a href="#Resolver-934"><span class="linenos"> 934</span></a> <span class="n">kind</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">kind</span>
|
|
</span><span id="Resolver-935"><a href="#Resolver-935"><span class="linenos"> 935</span></a>
|
|
</span><span id="Resolver-936"><a href="#Resolver-936"><span class="linenos"> 936</span></a> <span class="n">left</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">left</span><span class="o">.</span><span class="n">named_selects</span>
|
|
</span><span id="Resolver-937"><a href="#Resolver-937"><span class="linenos"> 937</span></a> <span class="n">right</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">right</span><span class="o">.</span><span class="n">named_selects</span>
|
|
</span><span id="Resolver-938"><a href="#Resolver-938"><span class="linenos"> 938</span></a>
|
|
</span><span id="Resolver-939"><a href="#Resolver-939"><span class="linenos"> 939</span></a> <span class="c1"># We use dict.fromkeys to deduplicate keys and maintain insertion order</span>
|
|
</span><span id="Resolver-940"><a href="#Resolver-940"><span class="linenos"> 940</span></a> <span class="k">if</span> <span class="n">side</span> <span class="o">==</span> <span class="s2">"LEFT"</span><span class="p">:</span>
|
|
</span><span id="Resolver-941"><a href="#Resolver-941"><span class="linenos"> 941</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">left</span>
|
|
</span><span id="Resolver-942"><a href="#Resolver-942"><span class="linenos"> 942</span></a> <span class="k">elif</span> <span class="n">side</span> <span class="o">==</span> <span class="s2">"FULL"</span><span class="p">:</span>
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</span><span id="Resolver-943"><a href="#Resolver-943"><span class="linenos"> 943</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">dict</span><span class="o">.</span><span class="n">fromkeys</span><span class="p">(</span><span class="n">left</span> <span class="o">+</span> <span class="n">right</span><span class="p">))</span>
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</span><span id="Resolver-944"><a href="#Resolver-944"><span class="linenos"> 944</span></a> <span class="k">elif</span> <span class="n">kind</span> <span class="o">==</span> <span class="s2">"INNER"</span><span class="p">:</span>
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</span><span id="Resolver-945"><a href="#Resolver-945"><span class="linenos"> 945</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">dict</span><span class="o">.</span><span class="n">fromkeys</span><span class="p">(</span><span class="n">left</span><span class="p">)</span><span class="o">.</span><span class="n">keys</span><span class="p">()</span> <span class="o">&</span> <span class="nb">dict</span><span class="o">.</span><span class="n">fromkeys</span><span class="p">(</span><span class="n">right</span><span class="p">)</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span>
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</span><span id="Resolver-946"><a href="#Resolver-946"><span class="linenos"> 946</span></a> <span class="k">else</span><span class="p">:</span>
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</span><span id="Resolver-947"><a href="#Resolver-947"><span class="linenos"> 947</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">named_selects</span>
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</span><span id="Resolver-948"><a href="#Resolver-948"><span class="linenos"> 948</span></a> <span class="k">else</span><span class="p">:</span>
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</span><span id="Resolver-949"><a href="#Resolver-949"><span class="linenos"> 949</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span>
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</span><span id="Resolver-950"><a href="#Resolver-950"><span class="linenos"> 950</span></a>
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</span><span id="Resolver-951"><a href="#Resolver-951"><span class="linenos"> 951</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
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</span><span id="Resolver-952"><a href="#Resolver-952"><span class="linenos"> 952</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span>
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</span><span id="Resolver-953"><a href="#Resolver-953"><span class="linenos"> 953</span></a> <span class="n">column_aliases</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span>
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</span><span id="Resolver-954"><a href="#Resolver-954"><span class="linenos"> 954</span></a> <span class="k">elif</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">Expression</span><span class="p">):</span>
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</span><span id="Resolver-955"><a href="#Resolver-955"><span class="linenos"> 955</span></a> <span class="n">column_aliases</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">alias_column_names</span>
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</span><span id="Resolver-956"><a href="#Resolver-956"><span class="linenos"> 956</span></a> <span class="k">else</span><span class="p">:</span>
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</span><span id="Resolver-957"><a href="#Resolver-957"><span class="linenos"> 957</span></a> <span class="n">column_aliases</span> <span class="o">=</span> <span class="p">[]</span>
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</span><span id="Resolver-958"><a href="#Resolver-958"><span class="linenos"> 958</span></a>
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</span><span id="Resolver-959"><a href="#Resolver-959"><span class="linenos"> 959</span></a> <span class="k">if</span> <span class="n">column_aliases</span><span class="p">:</span>
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</span><span id="Resolver-960"><a href="#Resolver-960"><span class="linenos"> 960</span></a> <span class="c1"># If the source's columns are aliased, their aliases shadow the corresponding column names.</span>
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</span><span id="Resolver-961"><a href="#Resolver-961"><span class="linenos"> 961</span></a> <span class="c1"># This can be expensive if there are lots of columns, so only do this if column_aliases exist.</span>
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</span><span id="Resolver-962"><a href="#Resolver-962"><span class="linenos"> 962</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">[</span>
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</span><span id="Resolver-963"><a href="#Resolver-963"><span class="linenos"> 963</span></a> <span class="n">alias</span> <span class="ow">or</span> <span class="n">name</span>
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</span><span id="Resolver-964"><a href="#Resolver-964"><span class="linenos"> 964</span></a> <span class="k">for</span> <span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">zip_longest</span><span class="p">(</span><span class="n">columns</span><span class="p">,</span> <span class="n">column_aliases</span><span class="p">)</span>
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</span><span id="Resolver-965"><a href="#Resolver-965"><span class="linenos"> 965</span></a> <span class="p">]</span>
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</span><span id="Resolver-966"><a href="#Resolver-966"><span class="linenos"> 966</span></a>
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</span><span id="Resolver-967"><a href="#Resolver-967"><span class="linenos"> 967</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_source_columns_cache</span><span class="p">[</span><span class="n">cache_key</span><span class="p">]</span> <span class="o">=</span> <span class="n">columns</span>
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</span><span id="Resolver-968"><a href="#Resolver-968"><span class="linenos"> 968</span></a>
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</span><span id="Resolver-969"><a href="#Resolver-969"><span class="linenos"> 969</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_source_columns_cache</span><span class="p">[</span><span class="n">cache_key</span><span class="p">]</span>
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</span><span id="Resolver-970"><a href="#Resolver-970"><span class="linenos"> 970</span></a>
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</span><span id="Resolver-971"><a href="#Resolver-971"><span class="linenos"> 971</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_get_all_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></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">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]]:</span>
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</span><span id="Resolver-972"><a href="#Resolver-972"><span class="linenos"> 972</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
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</span><span id="Resolver-973"><a href="#Resolver-973"><span class="linenos"> 973</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="p">{</span>
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</span><span id="Resolver-974"><a href="#Resolver-974"><span class="linenos"> 974</span></a> <span class="n">source_name</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">source_name</span><span class="p">)</span>
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</span><span id="Resolver-975"><a href="#Resolver-975"><span class="linenos"> 975</span></a> <span class="k">for</span> <span class="n">source_name</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span>
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</span><span id="Resolver-976"><a href="#Resolver-976"><span class="linenos"> 976</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">(),</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">lateral_sources</span><span class="o">.</span><span class="n">items</span><span class="p">()</span>
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</span><span id="Resolver-977"><a href="#Resolver-977"><span class="linenos"> 977</span></a> <span class="p">)</span>
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</span><span id="Resolver-978"><a href="#Resolver-978"><span class="linenos"> 978</span></a> <span class="p">}</span>
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</span><span id="Resolver-979"><a href="#Resolver-979"><span class="linenos"> 979</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span>
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</span><span id="Resolver-980"><a href="#Resolver-980"><span class="linenos"> 980</span></a>
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</span><span id="Resolver-981"><a href="#Resolver-981"><span class="linenos"> 981</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_get_unambiguous_columns</span><span class="p">(</span>
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</span><span id="Resolver-982"><a href="#Resolver-982"><span class="linenos"> 982</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">source_columns</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">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span>
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</span><span id="Resolver-983"><a href="#Resolver-983"><span class="linenos"> 983</span></a> <span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Mapping</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]:</span>
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</span><span id="Resolver-984"><a href="#Resolver-984"><span class="linenos"> 984</span></a><span class="w"> </span><span class="sd">"""</span>
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</span><span id="Resolver-985"><a href="#Resolver-985"><span class="linenos"> 985</span></a><span class="sd"> Find all the unambiguous columns in sources.</span>
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</span><span id="Resolver-986"><a href="#Resolver-986"><span class="linenos"> 986</span></a>
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</span><span id="Resolver-987"><a href="#Resolver-987"><span class="linenos"> 987</span></a><span class="sd"> Args:</span>
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</span><span id="Resolver-988"><a href="#Resolver-988"><span class="linenos"> 988</span></a><span class="sd"> source_columns: Mapping of names to source columns.</span>
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</span><span id="Resolver-989"><a href="#Resolver-989"><span class="linenos"> 989</span></a>
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</span><span id="Resolver-990"><a href="#Resolver-990"><span class="linenos"> 990</span></a><span class="sd"> Returns:</span>
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</span><span id="Resolver-991"><a href="#Resolver-991"><span class="linenos"> 991</span></a><span class="sd"> Mapping of column name to source name.</span>
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</span><span id="Resolver-992"><a href="#Resolver-992"><span class="linenos"> 992</span></a><span class="sd"> """</span>
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</span><span id="Resolver-993"><a href="#Resolver-993"><span class="linenos"> 993</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source_columns</span><span class="p">:</span>
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</span><span id="Resolver-994"><a href="#Resolver-994"><span class="linenos"> 994</span></a> <span class="k">return</span> <span class="p">{}</span>
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</span><span id="Resolver-995"><a href="#Resolver-995"><span class="linenos"> 995</span></a>
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</span><span id="Resolver-996"><a href="#Resolver-996"><span class="linenos"> 996</span></a> <span class="n">source_columns_pairs</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">source_columns</span><span class="o">.</span><span class="n">items</span><span class="p">())</span>
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</span><span id="Resolver-997"><a href="#Resolver-997"><span class="linenos"> 997</span></a>
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</span><span id="Resolver-998"><a href="#Resolver-998"><span class="linenos"> 998</span></a> <span class="n">first_table</span><span class="p">,</span> <span class="n">first_columns</span> <span class="o">=</span> <span class="n">source_columns_pairs</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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</span><span id="Resolver-999"><a href="#Resolver-999"><span class="linenos"> 999</span></a>
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</span><span id="Resolver-1000"><a href="#Resolver-1000"><span class="linenos">1000</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">source_columns_pairs</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="Resolver-1001"><a href="#Resolver-1001"><span class="linenos">1001</span></a> <span class="c1"># Performance optimization - avoid copying first_columns if there is only one table.</span>
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</span><span id="Resolver-1002"><a href="#Resolver-1002"><span class="linenos">1002</span></a> <span class="k">return</span> <span class="n">SingleValuedMapping</span><span class="p">(</span><span class="n">first_columns</span><span class="p">,</span> <span class="n">first_table</span><span class="p">)</span>
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</span><span id="Resolver-1003"><a href="#Resolver-1003"><span class="linenos">1003</span></a>
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</span><span id="Resolver-1004"><a href="#Resolver-1004"><span class="linenos">1004</span></a> <span class="n">unambiguous_columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">col</span><span class="p">:</span> <span class="n">first_table</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">first_columns</span><span class="p">}</span>
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</span><span id="Resolver-1005"><a href="#Resolver-1005"><span class="linenos">1005</span></a> <span class="n">all_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">unambiguous_columns</span><span class="p">)</span>
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</span><span id="Resolver-1006"><a href="#Resolver-1006"><span class="linenos">1006</span></a>
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</span><span id="Resolver-1007"><a href="#Resolver-1007"><span class="linenos">1007</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="n">source_columns_pairs</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span>
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</span><span id="Resolver-1008"><a href="#Resolver-1008"><span class="linenos">1008</span></a> <span class="n">unique</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span>
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</span><span id="Resolver-1009"><a href="#Resolver-1009"><span class="linenos">1009</span></a> <span class="n">ambiguous</span> <span class="o">=</span> <span class="n">all_columns</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="n">unique</span><span class="p">)</span>
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</span><span id="Resolver-1010"><a href="#Resolver-1010"><span class="linenos">1010</span></a> <span class="n">all_columns</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span>
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</span><span id="Resolver-1011"><a href="#Resolver-1011"><span class="linenos">1011</span></a>
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</span><span id="Resolver-1012"><a href="#Resolver-1012"><span class="linenos">1012</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">ambiguous</span><span class="p">:</span>
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</span><span id="Resolver-1013"><a href="#Resolver-1013"><span class="linenos">1013</span></a> <span class="n">unambiguous_columns</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
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</span><span id="Resolver-1014"><a href="#Resolver-1014"><span class="linenos">1014</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">unique</span><span class="o">.</span><span class="n">difference</span><span class="p">(</span><span class="n">ambiguous</span><span class="p">):</span>
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</span><span id="Resolver-1015"><a href="#Resolver-1015"><span class="linenos">1015</span></a> <span class="n">unambiguous_columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">table</span>
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</span><span id="Resolver-1016"><a href="#Resolver-1016"><span class="linenos">1016</span></a>
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</span><span id="Resolver-1017"><a href="#Resolver-1017"><span class="linenos">1017</span></a> <span class="k">return</span> <span class="n">unambiguous_columns</span>
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</span></pre></div>
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<div class="docstring"><p>Helper for resolving columns.</p>
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<p>This is a class so we can lazily load some things and easily share them across functions.</p>
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</div>
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<div id="Resolver.__init__" class="classattr">
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<input id="Resolver.__init__-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="name">Resolver</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">scope</span><span class="p">:</span> <span class="n"><a href="scope.html#Scope">sqlglot.optimizer.scope.Scope</a></span>,</span><span class="param"> <span class="n">schema</span><span class="p">:</span> <span class="n"><a href="../schema.html#Schema">sqlglot.schema.Schema</a></span>,</span><span class="param"> <span class="n">infer_schema</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span></span>)</span>
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<label class="view-source-button" for="Resolver.__init__-view-source"><span>View Source</span></label>
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</div>
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<a class="headerlink" href="#Resolver.__init__"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.__init__-841"><a href="#Resolver.__init__-841"><span class="linenos">841</span></a> <span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">:</span> <span class="n">Schema</span><span class="p">,</span> <span class="n">infer_schema</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="Resolver.__init__-842"><a href="#Resolver.__init__-842"><span class="linenos">842</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span> <span class="o">=</span> <span class="n">scope</span>
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</span><span id="Resolver.__init__-843"><a href="#Resolver.__init__-843"><span class="linenos">843</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">schema</span>
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</span><span id="Resolver.__init__-844"><a href="#Resolver.__init__-844"><span class="linenos">844</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</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">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]]]</span> <span class="o">=</span> <span class="kc">None</span>
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</span><span id="Resolver.__init__-845"><a href="#Resolver.__init__-845"><span class="linenos">845</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Mapping</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span>
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</span><span id="Resolver.__init__-846"><a href="#Resolver.__init__-846"><span class="linenos">846</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</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="o">=</span> <span class="kc">None</span>
|
|
</span><span id="Resolver.__init__-847"><a href="#Resolver.__init__-847"><span class="linenos">847</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_infer_schema</span> <span class="o">=</span> <span class="n">infer_schema</span>
|
|
</span><span id="Resolver.__init__-848"><a href="#Resolver.__init__-848"><span class="linenos">848</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_source_columns_cache</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="n">t</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">bool</span><span class="p">],</span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="p">{}</span>
|
|
</span></pre></div>
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|
|
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|
|
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|
</div>
|
|
<div id="Resolver.scope" class="classattr">
|
|
<div class="attr variable">
|
|
<span class="name">scope</span>
|
|
|
|
|
|
</div>
|
|
<a class="headerlink" href="#Resolver.scope"></a>
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</div>
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<div id="Resolver.schema" class="classattr">
|
|
<div class="attr variable">
|
|
<span class="name">schema</span>
|
|
|
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|
</div>
|
|
<a class="headerlink" href="#Resolver.schema"></a>
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</div>
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<div id="Resolver.get_table" class="classattr">
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<input id="Resolver.get_table-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
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<div class="attr function">
|
|
|
|
<span class="def">def</span>
|
|
<span class="name">get_table</span><span class="signature pdoc-code condensed">(<span class="param"><span class="bp">self</span>, </span><span class="param"><span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span></span><span class="return-annotation">) -> <span class="n">Optional</span><span class="p">[</span><span class="n"><a href="../expressions.html#Identifier">sqlglot.expressions.Identifier</a></span><span class="p">]</span>:</span></span>
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<label class="view-source-button" for="Resolver.get_table-view-source"><span>View Source</span></label>
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</div>
|
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<a class="headerlink" href="#Resolver.get_table"></a>
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<div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.get_table-850"><a href="#Resolver.get_table-850"><span class="linenos">850</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">get_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</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="Resolver.get_table-851"><a href="#Resolver.get_table-851"><span class="linenos">851</span></a><span class="w"> </span><span class="sd">"""</span>
|
|
</span><span id="Resolver.get_table-852"><a href="#Resolver.get_table-852"><span class="linenos">852</span></a><span class="sd"> Get the table for a column name.</span>
|
|
</span><span id="Resolver.get_table-853"><a href="#Resolver.get_table-853"><span class="linenos">853</span></a>
|
|
</span><span id="Resolver.get_table-854"><a href="#Resolver.get_table-854"><span class="linenos">854</span></a><span class="sd"> Args:</span>
|
|
</span><span id="Resolver.get_table-855"><a href="#Resolver.get_table-855"><span class="linenos">855</span></a><span class="sd"> column_name: The column name to find the table for.</span>
|
|
</span><span id="Resolver.get_table-856"><a href="#Resolver.get_table-856"><span class="linenos">856</span></a><span class="sd"> Returns:</span>
|
|
</span><span id="Resolver.get_table-857"><a href="#Resolver.get_table-857"><span class="linenos">857</span></a><span class="sd"> The table name if it can be found/inferred.</span>
|
|
</span><span id="Resolver.get_table-858"><a href="#Resolver.get_table-858"><span class="linenos">858</span></a><span class="sd"> """</span>
|
|
</span><span id="Resolver.get_table-859"><a href="#Resolver.get_table-859"><span class="linenos">859</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_table-860"><a href="#Resolver.get_table-860"><span class="linenos">860</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_unambiguous_columns</span><span class="p">(</span>
|
|
</span><span id="Resolver.get_table-861"><a href="#Resolver.get_table-861"><span class="linenos">861</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span>
|
|
</span><span id="Resolver.get_table-862"><a href="#Resolver.get_table-862"><span class="linenos">862</span></a> <span class="p">)</span>
|
|
</span><span id="Resolver.get_table-863"><a href="#Resolver.get_table-863"><span class="linenos">863</span></a>
|
|
</span><span id="Resolver.get_table-864"><a href="#Resolver.get_table-864"><span class="linenos">864</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span>
|
|
</span><span id="Resolver.get_table-865"><a href="#Resolver.get_table-865"><span class="linenos">865</span></a>
|
|
</span><span id="Resolver.get_table-866"><a href="#Resolver.get_table-866"><span class="linenos">866</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_name</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_infer_schema</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_table-867"><a href="#Resolver.get_table-867"><span class="linenos">867</span></a> <span class="n">sources_without_schema</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span>
|
|
</span><span id="Resolver.get_table-868"><a href="#Resolver.get_table-868"><span class="linenos">868</span></a> <span class="n">source</span>
|
|
</span><span id="Resolver.get_table-869"><a href="#Resolver.get_table-869"><span class="linenos">869</span></a> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span>
|
|
</span><span id="Resolver.get_table-870"><a href="#Resolver.get_table-870"><span class="linenos">870</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span>
|
|
</span><span id="Resolver.get_table-871"><a href="#Resolver.get_table-871"><span class="linenos">871</span></a> <span class="p">)</span>
|
|
</span><span id="Resolver.get_table-872"><a href="#Resolver.get_table-872"><span class="linenos">872</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_table-873"><a href="#Resolver.get_table-873"><span class="linenos">873</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
|
|
</span><span id="Resolver.get_table-874"><a href="#Resolver.get_table-874"><span class="linenos">874</span></a>
|
|
</span><span id="Resolver.get_table-875"><a href="#Resolver.get_table-875"><span class="linenos">875</span></a> <span class="k">if</span> <span class="n">table_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_table-876"><a href="#Resolver.get_table-876"><span class="linenos">876</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span>
|
|
</span><span id="Resolver.get_table-877"><a href="#Resolver.get_table-877"><span class="linenos">877</span></a>
|
|
</span><span id="Resolver.get_table-878"><a href="#Resolver.get_table-878"><span class="linenos">878</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span>
|
|
</span><span id="Resolver.get_table-879"><a href="#Resolver.get_table-879"><span class="linenos">879</span></a>
|
|
</span><span id="Resolver.get_table-880"><a href="#Resolver.get_table-880"><span class="linenos">880</span></a> <span class="k">if</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">Query</span><span class="p">):</span>
|
|
</span><span id="Resolver.get_table-881"><a href="#Resolver.get_table-881"><span class="linenos">881</span></a> <span class="k">while</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">alias</span> <span class="o">!=</span> <span class="n">table_name</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_table-882"><a href="#Resolver.get_table-882"><span class="linenos">882</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">parent</span>
|
|
</span><span id="Resolver.get_table-883"><a href="#Resolver.get_table-883"><span class="linenos">883</span></a>
|
|
</span><span id="Resolver.get_table-884"><a href="#Resolver.get_table-884"><span class="linenos">884</span></a> <span class="n">node_alias</span> <span class="o">=</span> <span class="n">node</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="Resolver.get_table-885"><a href="#Resolver.get_table-885"><span class="linenos">885</span></a> <span class="k">if</span> <span class="n">node_alias</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_table-886"><a href="#Resolver.get_table-886"><span class="linenos">886</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">node_alias</span><span class="o">.</span><span class="n">this</span><span class="p">)</span>
|
|
</span><span id="Resolver.get_table-887"><a href="#Resolver.get_table-887"><span class="linenos">887</span></a>
|
|
</span><span id="Resolver.get_table-888"><a href="#Resolver.get_table-888"><span class="linenos">888</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Get the table for a column name.</p>
|
|
|
|
<h6 id="arguments">Arguments:</h6>
|
|
|
|
<ul>
|
|
<li><strong>column_name:</strong> The column name to find the table for.</li>
|
|
</ul>
|
|
|
|
<h6 id="returns">Returns:</h6>
|
|
|
|
<blockquote>
|
|
<p>The table name if it can be found/inferred.</p>
|
|
</blockquote>
|
|
</div>
|
|
|
|
|
|
</div>
|
|
<div id="Resolver.all_columns" class="classattr">
|
|
<input id="Resolver.all_columns-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
|
<div class="attr variable">
|
|
<span class="name">all_columns</span><span class="annotation">: Set[str]</span>
|
|
|
|
<label class="view-source-button" for="Resolver.all_columns-view-source"><span>View Source</span></label>
|
|
|
|
</div>
|
|
<a class="headerlink" href="#Resolver.all_columns"></a>
|
|
<div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.all_columns-890"><a href="#Resolver.all_columns-890"><span class="linenos">890</span></a> <span class="nd">@property</span>
|
|
</span><span id="Resolver.all_columns-891"><a href="#Resolver.all_columns-891"><span class="linenos">891</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">all_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></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><span id="Resolver.all_columns-892"><a href="#Resolver.all_columns-892"><span class="linenos">892</span></a><span class="w"> </span><span class="sd">"""All available columns of all sources in this scope"""</span>
|
|
</span><span id="Resolver.all_columns-893"><a href="#Resolver.all_columns-893"><span class="linenos">893</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
|
|
</span><span id="Resolver.all_columns-894"><a href="#Resolver.all_columns-894"><span class="linenos">894</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="p">{</span>
|
|
</span><span id="Resolver.all_columns-895"><a href="#Resolver.all_columns-895"><span class="linenos">895</span></a> <span class="n">column</span> <span class="k">for</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span>
|
|
</span><span id="Resolver.all_columns-896"><a href="#Resolver.all_columns-896"><span class="linenos">896</span></a> <span class="p">}</span>
|
|
</span><span id="Resolver.all_columns-897"><a href="#Resolver.all_columns-897"><span class="linenos">897</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>All available columns of all sources in this scope</p>
|
|
</div>
|
|
|
|
|
|
</div>
|
|
<div id="Resolver.get_source_columns" class="classattr">
|
|
<input id="Resolver.get_source_columns-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">get_source_columns</span><span class="signature pdoc-code condensed">(<span class="param"><span class="bp">self</span>, </span><span class="param"><span class="n">name</span><span class="p">:</span> <span class="nb">str</span>, </span><span class="param"><span class="n">only_visible</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span></span><span class="return-annotation">) -> <span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span>:</span></span>
|
|
|
|
<label class="view-source-button" for="Resolver.get_source_columns-view-source"><span>View Source</span></label>
|
|
|
|
</div>
|
|
<a class="headerlink" href="#Resolver.get_source_columns"></a>
|
|
<div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.get_source_columns-899"><a href="#Resolver.get_source_columns-899"><span class="linenos">899</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</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="n">only_visible</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span>
|
|
</span><span id="Resolver.get_source_columns-900"><a href="#Resolver.get_source_columns-900"><span class="linenos">900</span></a><span class="w"> </span><span class="sd">"""Resolve the source columns for a given source `name`."""</span>
|
|
</span><span id="Resolver.get_source_columns-901"><a href="#Resolver.get_source_columns-901"><span class="linenos">901</span></a> <span class="n">cache_key</span> <span class="o">=</span> <span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span>
|
|
</span><span id="Resolver.get_source_columns-902"><a href="#Resolver.get_source_columns-902"><span class="linenos">902</span></a> <span class="k">if</span> <span class="n">cache_key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_source_columns_cache</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_source_columns-903"><a href="#Resolver.get_source_columns-903"><span class="linenos">903</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_source_columns-904"><a href="#Resolver.get_source_columns-904"><span class="linenos">904</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
|
|
</span><span id="Resolver.get_source_columns-905"><a href="#Resolver.get_source_columns-905"><span class="linenos">905</span></a>
|
|
</span><span id="Resolver.get_source_columns-906"><a href="#Resolver.get_source_columns-906"><span class="linenos">906</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span>
|
|
</span><span id="Resolver.get_source_columns-907"><a href="#Resolver.get_source_columns-907"><span class="linenos">907</span></a>
|
|
</span><span id="Resolver.get_source_columns-908"><a href="#Resolver.get_source_columns-908"><span class="linenos">908</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span>
|
|
</span><span id="Resolver.get_source_columns-909"><a href="#Resolver.get_source_columns-909"><span class="linenos">909</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span>
|
|
</span><span id="Resolver.get_source_columns-910"><a href="#Resolver.get_source_columns-910"><span class="linenos">910</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span>
|
|
</span><span id="Resolver.get_source_columns-911"><a href="#Resolver.get_source_columns-911"><span class="linenos">911</span></a> <span class="n">source</span><span class="o">.</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">Values</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="Resolver.get_source_columns-912"><a href="#Resolver.get_source_columns-912"><span class="linenos">912</span></a> <span class="p">):</span>
|
|
</span><span id="Resolver.get_source_columns-913"><a href="#Resolver.get_source_columns-913"><span class="linenos">913</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span>
|
|
</span><span id="Resolver.get_source_columns-914"><a href="#Resolver.get_source_columns-914"><span class="linenos">914</span></a>
|
|
</span><span id="Resolver.get_source_columns-915"><a href="#Resolver.get_source_columns-915"><span class="linenos">915</span></a> <span class="c1"># in bigquery, unnest structs are automatically scoped as tables, so you can</span>
|
|
</span><span id="Resolver.get_source_columns-916"><a href="#Resolver.get_source_columns-916"><span class="linenos">916</span></a> <span class="c1"># directly select a struct field in a query.</span>
|
|
</span><span id="Resolver.get_source_columns-917"><a href="#Resolver.get_source_columns-917"><span class="linenos">917</span></a> <span class="c1"># this handles the case where the unnest is statically defined.</span>
|
|
</span><span id="Resolver.get_source_columns-918"><a href="#Resolver.get_source_columns-918"><span class="linenos">918</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">dialect</span> <span class="o">==</span> <span class="s2">"bigquery"</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_source_columns-919"><a href="#Resolver.get_source_columns-919"><span class="linenos">919</span></a> <span class="k">if</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</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">STRUCT</span><span class="p">):</span>
|
|
</span><span id="Resolver.get_source_columns-920"><a href="#Resolver.get_source_columns-920"><span class="linenos">920</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> <span class="c1"># type: ignore</span>
|
|
</span><span id="Resolver.get_source_columns-921"><a href="#Resolver.get_source_columns-921"><span class="linenos">921</span></a> <span class="n">columns</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">k</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
|
|
</span><span id="Resolver.get_source_columns-922"><a href="#Resolver.get_source_columns-922"><span class="linenos">922</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</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">SetOperation</span><span class="p">):</span>
|
|
</span><span id="Resolver.get_source_columns-923"><a href="#Resolver.get_source_columns-923"><span class="linenos">923</span></a> <span class="n">set_op</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span>
|
|
</span><span id="Resolver.get_source_columns-924"><a href="#Resolver.get_source_columns-924"><span class="linenos">924</span></a>
|
|
</span><span id="Resolver.get_source_columns-925"><a href="#Resolver.get_source_columns-925"><span class="linenos">925</span></a> <span class="c1"># BigQuery specific set operations modifiers, e.g INNER UNION ALL BY NAME</span>
|
|
</span><span id="Resolver.get_source_columns-926"><a href="#Resolver.get_source_columns-926"><span class="linenos">926</span></a> <span class="n">on_column_list</span> <span class="o">=</span> <span class="n">set_op</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><span id="Resolver.get_source_columns-927"><a href="#Resolver.get_source_columns-927"><span class="linenos">927</span></a>
|
|
</span><span id="Resolver.get_source_columns-928"><a href="#Resolver.get_source_columns-928"><span class="linenos">928</span></a> <span class="k">if</span> <span class="n">on_column_list</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_source_columns-929"><a href="#Resolver.get_source_columns-929"><span class="linenos">929</span></a> <span class="c1"># The resulting columns are the columns in the ON clause:</span>
|
|
</span><span id="Resolver.get_source_columns-930"><a href="#Resolver.get_source_columns-930"><span class="linenos">930</span></a> <span class="c1"># {INNER | LEFT | FULL} UNION ALL BY NAME ON (col1, col2, ...)</span>
|
|
</span><span id="Resolver.get_source_columns-931"><a href="#Resolver.get_source_columns-931"><span class="linenos">931</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">[</span><span class="n">col</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">on_column_list</span><span class="p">]</span>
|
|
</span><span id="Resolver.get_source_columns-932"><a href="#Resolver.get_source_columns-932"><span class="linenos">932</span></a> <span class="k">elif</span> <span class="n">set_op</span><span class="o">.</span><span class="n">side</span> <span class="ow">or</span> <span class="n">set_op</span><span class="o">.</span><span class="n">kind</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_source_columns-933"><a href="#Resolver.get_source_columns-933"><span class="linenos">933</span></a> <span class="n">side</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">side</span>
|
|
</span><span id="Resolver.get_source_columns-934"><a href="#Resolver.get_source_columns-934"><span class="linenos">934</span></a> <span class="n">kind</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">kind</span>
|
|
</span><span id="Resolver.get_source_columns-935"><a href="#Resolver.get_source_columns-935"><span class="linenos">935</span></a>
|
|
</span><span id="Resolver.get_source_columns-936"><a href="#Resolver.get_source_columns-936"><span class="linenos">936</span></a> <span class="n">left</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">left</span><span class="o">.</span><span class="n">named_selects</span>
|
|
</span><span id="Resolver.get_source_columns-937"><a href="#Resolver.get_source_columns-937"><span class="linenos">937</span></a> <span class="n">right</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">right</span><span class="o">.</span><span class="n">named_selects</span>
|
|
</span><span id="Resolver.get_source_columns-938"><a href="#Resolver.get_source_columns-938"><span class="linenos">938</span></a>
|
|
</span><span id="Resolver.get_source_columns-939"><a href="#Resolver.get_source_columns-939"><span class="linenos">939</span></a> <span class="c1"># We use dict.fromkeys to deduplicate keys and maintain insertion order</span>
|
|
</span><span id="Resolver.get_source_columns-940"><a href="#Resolver.get_source_columns-940"><span class="linenos">940</span></a> <span class="k">if</span> <span class="n">side</span> <span class="o">==</span> <span class="s2">"LEFT"</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_source_columns-941"><a href="#Resolver.get_source_columns-941"><span class="linenos">941</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">left</span>
|
|
</span><span id="Resolver.get_source_columns-942"><a href="#Resolver.get_source_columns-942"><span class="linenos">942</span></a> <span class="k">elif</span> <span class="n">side</span> <span class="o">==</span> <span class="s2">"FULL"</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_source_columns-943"><a href="#Resolver.get_source_columns-943"><span class="linenos">943</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">dict</span><span class="o">.</span><span class="n">fromkeys</span><span class="p">(</span><span class="n">left</span> <span class="o">+</span> <span class="n">right</span><span class="p">))</span>
|
|
</span><span id="Resolver.get_source_columns-944"><a href="#Resolver.get_source_columns-944"><span class="linenos">944</span></a> <span class="k">elif</span> <span class="n">kind</span> <span class="o">==</span> <span class="s2">"INNER"</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_source_columns-945"><a href="#Resolver.get_source_columns-945"><span class="linenos">945</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">dict</span><span class="o">.</span><span class="n">fromkeys</span><span class="p">(</span><span class="n">left</span><span class="p">)</span><span class="o">.</span><span class="n">keys</span><span class="p">()</span> <span class="o">&</span> <span class="nb">dict</span><span class="o">.</span><span class="n">fromkeys</span><span class="p">(</span><span class="n">right</span><span class="p">)</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span>
|
|
</span><span id="Resolver.get_source_columns-946"><a href="#Resolver.get_source_columns-946"><span class="linenos">946</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_source_columns-947"><a href="#Resolver.get_source_columns-947"><span class="linenos">947</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">set_op</span><span class="o">.</span><span class="n">named_selects</span>
|
|
</span><span id="Resolver.get_source_columns-948"><a href="#Resolver.get_source_columns-948"><span class="linenos">948</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_source_columns-949"><a href="#Resolver.get_source_columns-949"><span class="linenos">949</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span>
|
|
</span><span id="Resolver.get_source_columns-950"><a href="#Resolver.get_source_columns-950"><span class="linenos">950</span></a>
|
|
</span><span id="Resolver.get_source_columns-951"><a href="#Resolver.get_source_columns-951"><span class="linenos">951</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
|
|
</span><span id="Resolver.get_source_columns-952"><a href="#Resolver.get_source_columns-952"><span class="linenos">952</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span>
|
|
</span><span id="Resolver.get_source_columns-953"><a href="#Resolver.get_source_columns-953"><span class="linenos">953</span></a> <span class="n">column_aliases</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span>
|
|
</span><span id="Resolver.get_source_columns-954"><a href="#Resolver.get_source_columns-954"><span class="linenos">954</span></a> <span class="k">elif</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">Expression</span><span class="p">):</span>
|
|
</span><span id="Resolver.get_source_columns-955"><a href="#Resolver.get_source_columns-955"><span class="linenos">955</span></a> <span class="n">column_aliases</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">alias_column_names</span>
|
|
</span><span id="Resolver.get_source_columns-956"><a href="#Resolver.get_source_columns-956"><span class="linenos">956</span></a> <span class="k">else</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_source_columns-957"><a href="#Resolver.get_source_columns-957"><span class="linenos">957</span></a> <span class="n">column_aliases</span> <span class="o">=</span> <span class="p">[]</span>
|
|
</span><span id="Resolver.get_source_columns-958"><a href="#Resolver.get_source_columns-958"><span class="linenos">958</span></a>
|
|
</span><span id="Resolver.get_source_columns-959"><a href="#Resolver.get_source_columns-959"><span class="linenos">959</span></a> <span class="k">if</span> <span class="n">column_aliases</span><span class="p">:</span>
|
|
</span><span id="Resolver.get_source_columns-960"><a href="#Resolver.get_source_columns-960"><span class="linenos">960</span></a> <span class="c1"># If the source's columns are aliased, their aliases shadow the corresponding column names.</span>
|
|
</span><span id="Resolver.get_source_columns-961"><a href="#Resolver.get_source_columns-961"><span class="linenos">961</span></a> <span class="c1"># This can be expensive if there are lots of columns, so only do this if column_aliases exist.</span>
|
|
</span><span id="Resolver.get_source_columns-962"><a href="#Resolver.get_source_columns-962"><span class="linenos">962</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">[</span>
|
|
</span><span id="Resolver.get_source_columns-963"><a href="#Resolver.get_source_columns-963"><span class="linenos">963</span></a> <span class="n">alias</span> <span class="ow">or</span> <span class="n">name</span>
|
|
</span><span id="Resolver.get_source_columns-964"><a href="#Resolver.get_source_columns-964"><span class="linenos">964</span></a> <span class="k">for</span> <span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">zip_longest</span><span class="p">(</span><span class="n">columns</span><span class="p">,</span> <span class="n">column_aliases</span><span class="p">)</span>
|
|
</span><span id="Resolver.get_source_columns-965"><a href="#Resolver.get_source_columns-965"><span class="linenos">965</span></a> <span class="p">]</span>
|
|
</span><span id="Resolver.get_source_columns-966"><a href="#Resolver.get_source_columns-966"><span class="linenos">966</span></a>
|
|
</span><span id="Resolver.get_source_columns-967"><a href="#Resolver.get_source_columns-967"><span class="linenos">967</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_source_columns_cache</span><span class="p">[</span><span class="n">cache_key</span><span class="p">]</span> <span class="o">=</span> <span class="n">columns</span>
|
|
</span><span id="Resolver.get_source_columns-968"><a href="#Resolver.get_source_columns-968"><span class="linenos">968</span></a>
|
|
</span><span id="Resolver.get_source_columns-969"><a href="#Resolver.get_source_columns-969"><span class="linenos">969</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_source_columns_cache</span><span class="p">[</span><span class="n">cache_key</span><span class="p">]</span>
|
|
</span></pre></div>
|
|
|
|
|
|
<div class="docstring"><p>Resolve the source columns for a given source <code>name</code>.</p>
|
|
</div>
|
|
|
|
|
|
</div>
|
|
</section>
|
|
</main>
|
|
<script>
|
|
function escapeHTML(html) {
|
|
return document.createElement('div').appendChild(document.createTextNode(html)).parentNode.innerHTML;
|
|
}
|
|
|
|
const originalContent = document.querySelector("main.pdoc");
|
|
let currentContent = originalContent;
|
|
|
|
function setContent(innerHTML) {
|
|
let elem;
|
|
if (innerHTML) {
|
|
elem = document.createElement("main");
|
|
elem.classList.add("pdoc");
|
|
elem.innerHTML = innerHTML;
|
|
} else {
|
|
elem = originalContent;
|
|
}
|
|
if (currentContent !== elem) {
|
|
currentContent.replaceWith(elem);
|
|
currentContent = elem;
|
|
}
|
|
}
|
|
|
|
function getSearchTerm() {
|
|
return (new URL(window.location)).searchParams.get("search");
|
|
}
|
|
|
|
const searchBox = document.querySelector(".pdoc input[type=search]");
|
|
searchBox.addEventListener("input", function () {
|
|
let url = new URL(window.location);
|
|
if (searchBox.value.trim()) {
|
|
url.hash = "";
|
|
url.searchParams.set("search", searchBox.value);
|
|
} else {
|
|
url.searchParams.delete("search");
|
|
}
|
|
history.replaceState("", "", url.toString());
|
|
onInput();
|
|
});
|
|
window.addEventListener("popstate", onInput);
|
|
|
|
|
|
let search, searchErr;
|
|
|
|
async function initialize() {
|
|
try {
|
|
search = await new Promise((resolve, reject) => {
|
|
const script = document.createElement("script");
|
|
script.type = "text/javascript";
|
|
script.async = true;
|
|
script.onload = () => resolve(window.pdocSearch);
|
|
script.onerror = (e) => reject(e);
|
|
script.src = "../../search.js";
|
|
document.getElementsByTagName("head")[0].appendChild(script);
|
|
});
|
|
} catch (e) {
|
|
console.error("Cannot fetch pdoc search index");
|
|
searchErr = "Cannot fetch search index.";
|
|
}
|
|
onInput();
|
|
|
|
document.querySelector("nav.pdoc").addEventListener("click", e => {
|
|
if (e.target.hash) {
|
|
searchBox.value = "";
|
|
searchBox.dispatchEvent(new Event("input"));
|
|
}
|
|
});
|
|
}
|
|
|
|
function onInput() {
|
|
setContent((() => {
|
|
const term = getSearchTerm();
|
|
if (!term) {
|
|
return null
|
|
}
|
|
if (searchErr) {
|
|
return `<h3>Error: ${searchErr}</h3>`
|
|
}
|
|
if (!search) {
|
|
return "<h3>Searching...</h3>"
|
|
}
|
|
|
|
window.scrollTo({top: 0, left: 0, behavior: 'auto'});
|
|
|
|
const results = search(term);
|
|
|
|
let html;
|
|
if (results.length === 0) {
|
|
html = `No search results for '${escapeHTML(term)}'.`
|
|
} else {
|
|
html = `<h4>${results.length} search result${results.length > 1 ? "s" : ""} for '${escapeHTML(term)}'.</h4>`;
|
|
}
|
|
for (let result of results.slice(0, 10)) {
|
|
let doc = result.doc;
|
|
let url = `../../${doc.modulename.replaceAll(".", "/")}.html`;
|
|
if (doc.qualname) {
|
|
url += `#${doc.qualname}`;
|
|
}
|
|
|
|
let heading;
|
|
switch (result.doc.kind) {
|
|
case "function":
|
|
if (doc.fullname.endsWith(".__init__")) {
|
|
heading = `<span class="name">${doc.fullname.replace(/\.__init__$/, "")}</span>${doc.signature}`;
|
|
} else {
|
|
heading = `<span class="def">${doc.funcdef}</span> <span class="name">${doc.fullname}</span>${doc.signature}`;
|
|
}
|
|
break;
|
|
case "class":
|
|
heading = `<span class="def">class</span> <span class="name">${doc.fullname}</span>`;
|
|
if (doc.bases)
|
|
heading += `<wbr>(<span class="base">${doc.bases}</span>)`;
|
|
heading += `:`;
|
|
break;
|
|
case "variable":
|
|
heading = `<span class="name">${doc.fullname}</span>`;
|
|
if (doc.annotation)
|
|
heading += `<span class="annotation">${doc.annotation}</span>`;
|
|
if (doc.default_value)
|
|
heading += `<span class="default_value"> = ${doc.default_value}</span>`;
|
|
break;
|
|
default:
|
|
heading = `<span class="name">${doc.fullname}</span>`;
|
|
break;
|
|
}
|
|
html += `
|
|
<section class="search-result">
|
|
<a href="${url}" class="attr ${doc.kind}">${heading}</a>
|
|
<div class="docstring">${doc.doc}</div>
|
|
</section>
|
|
`;
|
|
|
|
}
|
|
return html;
|
|
})());
|
|
}
|
|
|
|
if (getSearchTerm()) {
|
|
initialize();
|
|
searchBox.value = getSearchTerm();
|
|
onInput();
|
|
} else {
|
|
searchBox.addEventListener("focus", initialize, {once: true});
|
|
}
|
|
|
|
searchBox.addEventListener("keydown", e => {
|
|
if (["ArrowDown", "ArrowUp", "Enter"].includes(e.key)) {
|
|
let focused = currentContent.querySelector(".search-result.focused");
|
|
if (!focused) {
|
|
currentContent.querySelector(".search-result").classList.add("focused");
|
|
} else if (
|
|
e.key === "ArrowDown"
|
|
&& focused.nextElementSibling
|
|
&& focused.nextElementSibling.classList.contains("search-result")
|
|
) {
|
|
focused.classList.remove("focused");
|
|
focused.nextElementSibling.classList.add("focused");
|
|
focused.nextElementSibling.scrollIntoView({
|
|
behavior: "smooth",
|
|
block: "nearest",
|
|
inline: "nearest"
|
|
});
|
|
} else if (
|
|
e.key === "ArrowUp"
|
|
&& focused.previousElementSibling
|
|
&& focused.previousElementSibling.classList.contains("search-result")
|
|
) {
|
|
focused.classList.remove("focused");
|
|
focused.previousElementSibling.classList.add("focused");
|
|
focused.previousElementSibling.scrollIntoView({
|
|
behavior: "smooth",
|
|
block: "nearest",
|
|
inline: "nearest"
|
|
});
|
|
} else if (
|
|
e.key === "Enter"
|
|
) {
|
|
focused.querySelector("a").click();
|
|
}
|
|
}
|
|
});
|
|
</script></body>
|
|
</html> |