Merging upstream version 11.4.1.
Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
parent
ecb42ec17f
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89 changed files with 35352 additions and 33081 deletions
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<li>
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<a class="function" href="#remove_redundant_casts">remove_redundant_casts</a>
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</li>
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<li>
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<a class="function" href="#ensure_bool_predicates">ensure_bool_predicates</a>
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</li>
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</ul>
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@ -65,76 +68,98 @@
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<label class="view-source-button" for="mod-canonicalize-view-source"><span>View Source</span></label>
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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">import</span> <span class="nn">itertools</span>
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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="nn">__future__</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">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">exp</span>
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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="nn">itertools</span>
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</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a>
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</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a>
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</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="k">def</span> <span class="nf">canonicalize</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="w"> </span><span class="sd">"""Converts a sql expression into a standard form.</span>
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</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a><span class="kn">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">exp</span>
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</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="kn">from</span> <span class="nn">sqlglot.helper</span> <span class="kn">import</span> <span class="n">should_identify</span>
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</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a>
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</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a>
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</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="sd"> This method relies on annotate_types because many of the</span>
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</span><span id="L-10"><a href="#L-10"><span class="linenos">10</span></a><span class="sd"> conversions rely on type inference.</span>
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</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="k">def</span> <span class="nf">canonicalize</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="n">identify</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s2">"safe"</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="L-10"><a href="#L-10"><span class="linenos">10</span></a><span class="w"> </span><span class="sd">"""Converts a sql expression into a standard form.</span>
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</span><span id="L-11"><a href="#L-11"><span class="linenos">11</span></a>
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</span><span id="L-12"><a href="#L-12"><span class="linenos">12</span></a><span class="sd"> Args:</span>
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</span><span id="L-13"><a href="#L-13"><span class="linenos">13</span></a><span class="sd"> expression: The expression to canonicalize.</span>
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</span><span id="L-14"><a href="#L-14"><span class="linenos">14</span></a><span class="sd"> """</span>
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</span><span id="L-15"><a href="#L-15"><span class="linenos">15</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">canonicalize</span><span class="p">)</span>
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</span><span id="L-16"><a href="#L-16"><span class="linenos">16</span></a>
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</span><span id="L-17"><a href="#L-17"><span class="linenos">17</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">add_text_to_concat</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
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</span><span id="L-18"><a href="#L-18"><span class="linenos">18</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">coerce_type</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
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</span><span id="L-19"><a href="#L-19"><span class="linenos">19</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">remove_redundant_casts</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
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</span><span id="L-12"><a href="#L-12"><span class="linenos">12</span></a><span class="sd"> This method relies on annotate_types because many of the</span>
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</span><span id="L-13"><a href="#L-13"><span class="linenos">13</span></a><span class="sd"> conversions rely on type inference.</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="sd"> Args:</span>
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</span><span id="L-16"><a href="#L-16"><span class="linenos">16</span></a><span class="sd"> expression: The expression to canonicalize.</span>
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</span><span id="L-17"><a href="#L-17"><span class="linenos">17</span></a><span class="sd"> identify: Whether or not to force identify identifier.</span>
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</span><span id="L-18"><a href="#L-18"><span class="linenos">18</span></a><span class="sd"> """</span>
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</span><span id="L-19"><a href="#L-19"><span class="linenos">19</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">canonicalize</span><span class="p">,</span> <span class="n">identify</span><span class="o">=</span><span class="n">identify</span><span class="p">)</span>
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</span><span id="L-20"><a href="#L-20"><span class="linenos">20</span></a>
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</span><span id="L-21"><a href="#L-21"><span class="linenos">21</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">Identifier</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">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"quoted"</span><span class="p">,</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>
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</span><span id="L-24"><a href="#L-24"><span class="linenos">24</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span><span id="L-21"><a href="#L-21"><span class="linenos">21</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">add_text_to_concat</span><span class="p">(</span><span class="n">expression</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">expression</span> <span class="o">=</span> <span class="n">coerce_type</span><span class="p">(</span><span class="n">expression</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">expression</span> <span class="o">=</span> <span class="n">remove_redundant_casts</span><span class="p">(</span><span class="n">expression</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">expression</span> <span class="o">=</span> <span class="n">ensure_bool_predicates</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
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</span><span id="L-25"><a href="#L-25"><span class="linenos">25</span></a>
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</span><span id="L-26"><a href="#L-26"><span class="linenos">26</span></a>
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</span><span id="L-27"><a href="#L-27"><span class="linenos">27</span></a><span class="k">def</span> <span class="nf">add_text_to_concat</span><span class="p">(</span><span class="n">node</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="L-28"><a href="#L-28"><span class="linenos">28</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">Add</span><span class="p">)</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">type</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEXT_TYPES</span><span class="p">:</span>
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</span><span id="L-29"><a href="#L-29"><span class="linenos">29</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Concat</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span>
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</span><span id="L-30"><a href="#L-30"><span class="linenos">30</span></a> <span class="k">return</span> <span class="n">node</span>
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</span><span id="L-26"><a href="#L-26"><span class="linenos">26</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">Identifier</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="k">if</span> <span class="n">should_identify</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">identify</span><span class="p">):</span>
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</span><span id="L-28"><a href="#L-28"><span class="linenos">28</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"quoted"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
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</span><span id="L-29"><a href="#L-29"><span class="linenos">29</span></a>
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</span><span id="L-30"><a href="#L-30"><span class="linenos">30</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span><span id="L-31"><a href="#L-31"><span class="linenos">31</span></a>
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</span><span id="L-32"><a href="#L-32"><span class="linenos">32</span></a>
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</span><span id="L-33"><a href="#L-33"><span class="linenos">33</span></a><span class="k">def</span> <span class="nf">coerce_type</span><span class="p">(</span><span class="n">node</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="L-34"><a href="#L-34"><span class="linenos">34</span></a> <span class="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">Binary</span><span class="p">):</span>
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</span><span id="L-35"><a href="#L-35"><span class="linenos">35</span></a> <span class="n">_coerce_date</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">node</span><span class="o">.</span><span class="n">right</span><span class="p">)</span>
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</span><span id="L-36"><a href="#L-36"><span class="linenos">36</span></a> <span class="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">Between</span><span class="p">):</span>
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</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a> <span class="n">_coerce_date</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="n">node</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"low"</span><span class="p">])</span>
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</span><span id="L-38"><a href="#L-38"><span class="linenos">38</span></a> <span class="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">Extract</span><span class="p">):</span>
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</span><span id="L-39"><a href="#L-39"><span class="linenos">39</span></a> <span class="k">if</span> <span class="n">node</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">this</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEMPORAL_TYPES</span><span class="p">:</span>
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</span><span id="L-40"><a href="#L-40"><span class="linenos">40</span></a> <span class="n">_replace_cast</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="s2">"datetime"</span><span class="p">)</span>
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</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> <span class="k">return</span> <span class="n">node</span>
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</span><span id="L-42"><a href="#L-42"><span class="linenos">42</span></a>
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</span><span id="L-43"><a href="#L-43"><span class="linenos">43</span></a>
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</span><span id="L-44"><a href="#L-44"><span class="linenos">44</span></a><span class="k">def</span> <span class="nf">remove_redundant_casts</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
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</span><span id="L-45"><a href="#L-45"><span class="linenos">45</span></a> <span class="k">if</span> <span class="p">(</span>
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</span><span id="L-46"><a href="#L-46"><span class="linenos">46</span></a> <span class="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">Cast</span><span class="p">)</span>
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</span><span id="L-47"><a href="#L-47"><span class="linenos">47</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">type</span>
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</span><span id="L-48"><a href="#L-48"><span class="linenos">48</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">type</span>
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</span><span id="L-49"><a href="#L-49"><span class="linenos">49</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span>
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</span><span id="L-50"><a href="#L-50"><span class="linenos">50</span></a> <span class="p">):</span>
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</span><span id="L-51"><a href="#L-51"><span class="linenos">51</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span>
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</span><span id="L-52"><a href="#L-52"><span class="linenos">52</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span><span id="L-53"><a href="#L-53"><span class="linenos">53</span></a>
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</span><span id="L-54"><a href="#L-54"><span class="linenos">54</span></a>
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</span><span id="L-55"><a href="#L-55"><span class="linenos">55</span></a><span class="k">def</span> <span class="nf">_coerce_date</span><span class="p">(</span><span class="n">a</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">b</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
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</span><span id="L-56"><a href="#L-56"><span class="linenos">56</span></a> <span class="k">for</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">permutations</span><span class="p">([</span><span class="n">a</span><span class="p">,</span> <span class="n">b</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="k">if</span> <span class="p">(</span>
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</span><span id="L-58"><a href="#L-58"><span class="linenos">58</span></a> <span class="n">a</span><span class="o">.</span><span class="n">type</span>
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</span><span id="L-59"><a href="#L-59"><span class="linenos">59</span></a> <span class="ow">and</span> <span class="n">a</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">DATE</span>
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</span><span id="L-60"><a href="#L-60"><span class="linenos">60</span></a> <span class="ow">and</span> <span class="n">b</span><span class="o">.</span><span class="n">type</span>
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</span><span id="L-61"><a href="#L-61"><span class="linenos">61</span></a> <span class="ow">and</span> <span class="n">b</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="o">!=</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">DATE</span>
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||||
</span><span id="L-62"><a href="#L-62"><span class="linenos">62</span></a> <span class="p">):</span>
|
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</span><span id="L-63"><a href="#L-63"><span class="linenos">63</span></a> <span class="n">_replace_cast</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="s2">"date"</span><span class="p">)</span>
|
||||
</span><span id="L-64"><a href="#L-64"><span class="linenos">64</span></a>
|
||||
</span><span id="L-33"><a href="#L-33"><span class="linenos">33</span></a><span class="k">def</span> <span class="nf">add_text_to_concat</span><span class="p">(</span><span class="n">node</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
||||
</span><span id="L-34"><a href="#L-34"><span class="linenos">34</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">Add</span><span class="p">)</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">type</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEXT_TYPES</span><span class="p">:</span>
|
||||
</span><span id="L-35"><a href="#L-35"><span class="linenos">35</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Concat</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span>
|
||||
</span><span id="L-36"><a href="#L-36"><span class="linenos">36</span></a> <span class="k">return</span> <span class="n">node</span>
|
||||
</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a>
|
||||
</span><span id="L-38"><a href="#L-38"><span class="linenos">38</span></a>
|
||||
</span><span id="L-39"><a href="#L-39"><span class="linenos">39</span></a><span class="k">def</span> <span class="nf">coerce_type</span><span class="p">(</span><span class="n">node</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
||||
</span><span id="L-40"><a href="#L-40"><span class="linenos">40</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">Binary</span><span class="p">):</span>
|
||||
</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> <span class="n">_coerce_date</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">node</span><span class="o">.</span><span class="n">right</span><span class="p">)</span>
|
||||
</span><span id="L-42"><a href="#L-42"><span class="linenos">42</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">Between</span><span class="p">):</span>
|
||||
</span><span id="L-43"><a href="#L-43"><span class="linenos">43</span></a> <span class="n">_coerce_date</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="n">node</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"low"</span><span class="p">])</span>
|
||||
</span><span id="L-44"><a href="#L-44"><span class="linenos">44</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">Extract</span><span class="p">):</span>
|
||||
</span><span id="L-45"><a href="#L-45"><span class="linenos">45</span></a> <span class="k">if</span> <span class="n">node</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">this</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEMPORAL_TYPES</span><span class="p">:</span>
|
||||
</span><span id="L-46"><a href="#L-46"><span class="linenos">46</span></a> <span class="n">_replace_cast</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="s2">"datetime"</span><span class="p">)</span>
|
||||
</span><span id="L-47"><a href="#L-47"><span class="linenos">47</span></a> <span class="k">return</span> <span class="n">node</span>
|
||||
</span><span id="L-48"><a href="#L-48"><span class="linenos">48</span></a>
|
||||
</span><span id="L-49"><a href="#L-49"><span class="linenos">49</span></a>
|
||||
</span><span id="L-50"><a href="#L-50"><span class="linenos">50</span></a><span class="k">def</span> <span class="nf">remove_redundant_casts</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-51"><a href="#L-51"><span class="linenos">51</span></a> <span class="k">if</span> <span class="p">(</span>
|
||||
</span><span id="L-52"><a href="#L-52"><span class="linenos">52</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">)</span>
|
||||
</span><span id="L-53"><a href="#L-53"><span class="linenos">53</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">type</span>
|
||||
</span><span id="L-54"><a href="#L-54"><span class="linenos">54</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">type</span>
|
||||
</span><span id="L-55"><a href="#L-55"><span class="linenos">55</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span>
|
||||
</span><span id="L-56"><a href="#L-56"><span class="linenos">56</span></a> <span class="p">):</span>
|
||||
</span><span id="L-57"><a href="#L-57"><span class="linenos">57</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span>
|
||||
</span><span id="L-58"><a href="#L-58"><span class="linenos">58</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span><span id="L-59"><a href="#L-59"><span class="linenos">59</span></a>
|
||||
</span><span id="L-60"><a href="#L-60"><span class="linenos">60</span></a>
|
||||
</span><span id="L-61"><a href="#L-61"><span class="linenos">61</span></a><span class="k">def</span> <span class="nf">ensure_bool_predicates</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-62"><a href="#L-62"><span class="linenos">62</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">Connector</span><span class="p">):</span>
|
||||
</span><span id="L-63"><a href="#L-63"><span class="linenos">63</span></a> <span class="n">_replace_int_predicate</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">left</span><span class="p">)</span>
|
||||
</span><span id="L-64"><a href="#L-64"><span class="linenos">64</span></a> <span class="n">_replace_int_predicate</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">right</span><span class="p">)</span>
|
||||
</span><span id="L-65"><a href="#L-65"><span class="linenos">65</span></a>
|
||||
</span><span id="L-66"><a href="#L-66"><span class="linenos">66</span></a><span class="k">def</span> <span class="nf">_replace_cast</span><span class="p">(</span><span class="n">node</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">,</span> <span class="n">to</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>
|
||||
</span><span id="L-67"><a href="#L-67"><span class="linenos">67</span></a> <span class="n">data_type</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">build</span><span class="p">(</span><span class="n">to</span><span class="p">)</span>
|
||||
</span><span id="L-68"><a href="#L-68"><span class="linenos">68</span></a> <span class="n">cast</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">to</span><span class="o">=</span><span class="n">data_type</span><span class="p">)</span>
|
||||
</span><span id="L-69"><a href="#L-69"><span class="linenos">69</span></a> <span class="n">cast</span><span class="o">.</span><span class="n">type</span> <span class="o">=</span> <span class="n">data_type</span>
|
||||
</span><span id="L-70"><a href="#L-70"><span class="linenos">70</span></a> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">cast</span><span class="p">)</span>
|
||||
</span><span id="L-66"><a href="#L-66"><span class="linenos">66</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Having</span><span class="p">)):</span>
|
||||
</span><span id="L-67"><a href="#L-67"><span class="linenos">67</span></a> <span class="n">_replace_int_predicate</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">)</span>
|
||||
</span><span id="L-68"><a href="#L-68"><span class="linenos">68</span></a>
|
||||
</span><span id="L-69"><a href="#L-69"><span class="linenos">69</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span><span id="L-70"><a href="#L-70"><span class="linenos">70</span></a>
|
||||
</span><span id="L-71"><a href="#L-71"><span class="linenos">71</span></a>
|
||||
</span><span id="L-72"><a href="#L-72"><span class="linenos">72</span></a><span class="k">def</span> <span class="nf">_coerce_date</span><span class="p">(</span><span class="n">a</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">b</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-73"><a href="#L-73"><span class="linenos">73</span></a> <span class="k">for</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">permutations</span><span class="p">([</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">]):</span>
|
||||
</span><span id="L-74"><a href="#L-74"><span class="linenos">74</span></a> <span class="k">if</span> <span class="p">(</span>
|
||||
</span><span id="L-75"><a href="#L-75"><span class="linenos">75</span></a> <span class="n">a</span><span class="o">.</span><span class="n">type</span>
|
||||
</span><span id="L-76"><a href="#L-76"><span class="linenos">76</span></a> <span class="ow">and</span> <span class="n">a</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">DATE</span>
|
||||
</span><span id="L-77"><a href="#L-77"><span class="linenos">77</span></a> <span class="ow">and</span> <span class="n">b</span><span class="o">.</span><span class="n">type</span>
|
||||
</span><span id="L-78"><a href="#L-78"><span class="linenos">78</span></a> <span class="ow">and</span> <span class="n">b</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="o">!=</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">DATE</span>
|
||||
</span><span id="L-79"><a href="#L-79"><span class="linenos">79</span></a> <span class="p">):</span>
|
||||
</span><span id="L-80"><a href="#L-80"><span class="linenos">80</span></a> <span class="n">_replace_cast</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="s2">"date"</span><span class="p">)</span>
|
||||
</span><span id="L-81"><a href="#L-81"><span class="linenos">81</span></a>
|
||||
</span><span id="L-82"><a href="#L-82"><span class="linenos">82</span></a>
|
||||
</span><span id="L-83"><a href="#L-83"><span class="linenos">83</span></a><span class="k">def</span> <span class="nf">_replace_cast</span><span class="p">(</span><span class="n">node</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">,</span> <span class="n">to</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>
|
||||
</span><span id="L-84"><a href="#L-84"><span class="linenos">84</span></a> <span class="n">data_type</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">build</span><span class="p">(</span><span class="n">to</span><span class="p">)</span>
|
||||
</span><span id="L-85"><a href="#L-85"><span class="linenos">85</span></a> <span class="n">cast</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">to</span><span class="o">=</span><span class="n">data_type</span><span class="p">)</span>
|
||||
</span><span id="L-86"><a href="#L-86"><span class="linenos">86</span></a> <span class="n">cast</span><span class="o">.</span><span class="n">type</span> <span class="o">=</span> <span class="n">data_type</span>
|
||||
</span><span id="L-87"><a href="#L-87"><span class="linenos">87</span></a> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">cast</span><span class="p">)</span>
|
||||
</span><span id="L-88"><a href="#L-88"><span class="linenos">88</span></a>
|
||||
</span><span id="L-89"><a href="#L-89"><span class="linenos">89</span></a>
|
||||
</span><span id="L-90"><a href="#L-90"><span class="linenos">90</span></a><span class="k">def</span> <span class="nf">_replace_int_predicate</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="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-91"><a href="#L-91"><span class="linenos">91</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">type</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">INTEGER_TYPES</span><span class="p">:</span>
|
||||
</span><span id="L-92"><a href="#L-92"><span class="linenos">92</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">NEQ</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">expression</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="mi">0</span><span class="p">)))</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
|
@ -144,31 +169,34 @@
|
|||
<div class="attr function">
|
||||
|
||||
<span class="def">def</span>
|
||||
<span class="name">canonicalize</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>
|
||||
<span class="name">canonicalize</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">identify</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s1">'safe'</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="canonicalize-view-source"><span>View Source</span></label>
|
||||
|
||||
</div>
|
||||
<a class="headerlink" href="#canonicalize"></a>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="canonicalize-7"><a href="#canonicalize-7"><span class="linenos"> 7</span></a><span class="k">def</span> <span class="nf">canonicalize</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="canonicalize-8"><a href="#canonicalize-8"><span class="linenos"> 8</span></a><span class="w"> </span><span class="sd">"""Converts a sql expression into a standard form.</span>
|
||||
</span><span id="canonicalize-9"><a href="#canonicalize-9"><span class="linenos"> 9</span></a>
|
||||
</span><span id="canonicalize-10"><a href="#canonicalize-10"><span class="linenos">10</span></a><span class="sd"> This method relies on annotate_types because many of the</span>
|
||||
</span><span id="canonicalize-11"><a href="#canonicalize-11"><span class="linenos">11</span></a><span class="sd"> conversions rely on type inference.</span>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="canonicalize-10"><a href="#canonicalize-10"><span class="linenos">10</span></a><span class="k">def</span> <span class="nf">canonicalize</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="n">identify</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s2">"safe"</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="canonicalize-11"><a href="#canonicalize-11"><span class="linenos">11</span></a><span class="w"> </span><span class="sd">"""Converts a sql expression into a standard form.</span>
|
||||
</span><span id="canonicalize-12"><a href="#canonicalize-12"><span class="linenos">12</span></a>
|
||||
</span><span id="canonicalize-13"><a href="#canonicalize-13"><span class="linenos">13</span></a><span class="sd"> Args:</span>
|
||||
</span><span id="canonicalize-14"><a href="#canonicalize-14"><span class="linenos">14</span></a><span class="sd"> expression: The expression to canonicalize.</span>
|
||||
</span><span id="canonicalize-15"><a href="#canonicalize-15"><span class="linenos">15</span></a><span class="sd"> """</span>
|
||||
</span><span id="canonicalize-16"><a href="#canonicalize-16"><span class="linenos">16</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">canonicalize</span><span class="p">)</span>
|
||||
</span><span id="canonicalize-17"><a href="#canonicalize-17"><span class="linenos">17</span></a>
|
||||
</span><span id="canonicalize-18"><a href="#canonicalize-18"><span class="linenos">18</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">add_text_to_concat</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
||||
</span><span id="canonicalize-19"><a href="#canonicalize-19"><span class="linenos">19</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">coerce_type</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
||||
</span><span id="canonicalize-20"><a href="#canonicalize-20"><span class="linenos">20</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">remove_redundant_casts</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
||||
</span><span id="canonicalize-13"><a href="#canonicalize-13"><span class="linenos">13</span></a><span class="sd"> This method relies on annotate_types because many of the</span>
|
||||
</span><span id="canonicalize-14"><a href="#canonicalize-14"><span class="linenos">14</span></a><span class="sd"> conversions rely on type inference.</span>
|
||||
</span><span id="canonicalize-15"><a href="#canonicalize-15"><span class="linenos">15</span></a>
|
||||
</span><span id="canonicalize-16"><a href="#canonicalize-16"><span class="linenos">16</span></a><span class="sd"> Args:</span>
|
||||
</span><span id="canonicalize-17"><a href="#canonicalize-17"><span class="linenos">17</span></a><span class="sd"> expression: The expression to canonicalize.</span>
|
||||
</span><span id="canonicalize-18"><a href="#canonicalize-18"><span class="linenos">18</span></a><span class="sd"> identify: Whether or not to force identify identifier.</span>
|
||||
</span><span id="canonicalize-19"><a href="#canonicalize-19"><span class="linenos">19</span></a><span class="sd"> """</span>
|
||||
</span><span id="canonicalize-20"><a href="#canonicalize-20"><span class="linenos">20</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">canonicalize</span><span class="p">,</span> <span class="n">identify</span><span class="o">=</span><span class="n">identify</span><span class="p">)</span>
|
||||
</span><span id="canonicalize-21"><a href="#canonicalize-21"><span class="linenos">21</span></a>
|
||||
</span><span id="canonicalize-22"><a href="#canonicalize-22"><span class="linenos">22</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">Identifier</span><span class="p">):</span>
|
||||
</span><span id="canonicalize-23"><a href="#canonicalize-23"><span class="linenos">23</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"quoted"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
|
||||
</span><span id="canonicalize-24"><a href="#canonicalize-24"><span class="linenos">24</span></a>
|
||||
</span><span id="canonicalize-25"><a href="#canonicalize-25"><span class="linenos">25</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span><span id="canonicalize-22"><a href="#canonicalize-22"><span class="linenos">22</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">add_text_to_concat</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
||||
</span><span id="canonicalize-23"><a href="#canonicalize-23"><span class="linenos">23</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">coerce_type</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
||||
</span><span id="canonicalize-24"><a href="#canonicalize-24"><span class="linenos">24</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">remove_redundant_casts</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
||||
</span><span id="canonicalize-25"><a href="#canonicalize-25"><span class="linenos">25</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">ensure_bool_predicates</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span>
|
||||
</span><span id="canonicalize-26"><a href="#canonicalize-26"><span class="linenos">26</span></a>
|
||||
</span><span id="canonicalize-27"><a href="#canonicalize-27"><span class="linenos">27</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">Identifier</span><span class="p">):</span>
|
||||
</span><span id="canonicalize-28"><a href="#canonicalize-28"><span class="linenos">28</span></a> <span class="k">if</span> <span class="n">should_identify</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">identify</span><span class="p">):</span>
|
||||
</span><span id="canonicalize-29"><a href="#canonicalize-29"><span class="linenos">29</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"quoted"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
|
||||
</span><span id="canonicalize-30"><a href="#canonicalize-30"><span class="linenos">30</span></a>
|
||||
</span><span id="canonicalize-31"><a href="#canonicalize-31"><span class="linenos">31</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
|
@ -181,6 +209,7 @@ conversions rely on type inference.</p>
|
|||
|
||||
<ul>
|
||||
<li><strong>expression:</strong> The expression to canonicalize.</li>
|
||||
<li><strong>identify:</strong> Whether or not to force identify identifier.</li>
|
||||
</ul>
|
||||
</div>
|
||||
|
||||
|
|
@ -197,10 +226,10 @@ conversions rely on type inference.</p>
|
|||
|
||||
</div>
|
||||
<a class="headerlink" href="#add_text_to_concat"></a>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="add_text_to_concat-28"><a href="#add_text_to_concat-28"><span class="linenos">28</span></a><span class="k">def</span> <span class="nf">add_text_to_concat</span><span class="p">(</span><span class="n">node</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
||||
</span><span id="add_text_to_concat-29"><a href="#add_text_to_concat-29"><span class="linenos">29</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">Add</span><span class="p">)</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">type</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEXT_TYPES</span><span class="p">:</span>
|
||||
</span><span id="add_text_to_concat-30"><a href="#add_text_to_concat-30"><span class="linenos">30</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Concat</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span>
|
||||
</span><span id="add_text_to_concat-31"><a href="#add_text_to_concat-31"><span class="linenos">31</span></a> <span class="k">return</span> <span class="n">node</span>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="add_text_to_concat-34"><a href="#add_text_to_concat-34"><span class="linenos">34</span></a><span class="k">def</span> <span class="nf">add_text_to_concat</span><span class="p">(</span><span class="n">node</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
||||
</span><span id="add_text_to_concat-35"><a href="#add_text_to_concat-35"><span class="linenos">35</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">Add</span><span class="p">)</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">type</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEXT_TYPES</span><span class="p">:</span>
|
||||
</span><span id="add_text_to_concat-36"><a href="#add_text_to_concat-36"><span class="linenos">36</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Concat</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span>
|
||||
</span><span id="add_text_to_concat-37"><a href="#add_text_to_concat-37"><span class="linenos">37</span></a> <span class="k">return</span> <span class="n">node</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
|
@ -218,15 +247,15 @@ conversions rely on type inference.</p>
|
|||
|
||||
</div>
|
||||
<a class="headerlink" href="#coerce_type"></a>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="coerce_type-34"><a href="#coerce_type-34"><span class="linenos">34</span></a><span class="k">def</span> <span class="nf">coerce_type</span><span class="p">(</span><span class="n">node</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
||||
</span><span id="coerce_type-35"><a href="#coerce_type-35"><span class="linenos">35</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">Binary</span><span class="p">):</span>
|
||||
</span><span id="coerce_type-36"><a href="#coerce_type-36"><span class="linenos">36</span></a> <span class="n">_coerce_date</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">node</span><span class="o">.</span><span class="n">right</span><span class="p">)</span>
|
||||
</span><span id="coerce_type-37"><a href="#coerce_type-37"><span class="linenos">37</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">Between</span><span class="p">):</span>
|
||||
</span><span id="coerce_type-38"><a href="#coerce_type-38"><span class="linenos">38</span></a> <span class="n">_coerce_date</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="n">node</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"low"</span><span class="p">])</span>
|
||||
</span><span id="coerce_type-39"><a href="#coerce_type-39"><span class="linenos">39</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">Extract</span><span class="p">):</span>
|
||||
</span><span id="coerce_type-40"><a href="#coerce_type-40"><span class="linenos">40</span></a> <span class="k">if</span> <span class="n">node</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">this</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEMPORAL_TYPES</span><span class="p">:</span>
|
||||
</span><span id="coerce_type-41"><a href="#coerce_type-41"><span class="linenos">41</span></a> <span class="n">_replace_cast</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="s2">"datetime"</span><span class="p">)</span>
|
||||
</span><span id="coerce_type-42"><a href="#coerce_type-42"><span class="linenos">42</span></a> <span class="k">return</span> <span class="n">node</span>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="coerce_type-40"><a href="#coerce_type-40"><span class="linenos">40</span></a><span class="k">def</span> <span class="nf">coerce_type</span><span class="p">(</span><span class="n">node</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
||||
</span><span id="coerce_type-41"><a href="#coerce_type-41"><span class="linenos">41</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">Binary</span><span class="p">):</span>
|
||||
</span><span id="coerce_type-42"><a href="#coerce_type-42"><span class="linenos">42</span></a> <span class="n">_coerce_date</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">node</span><span class="o">.</span><span class="n">right</span><span class="p">)</span>
|
||||
</span><span id="coerce_type-43"><a href="#coerce_type-43"><span class="linenos">43</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">Between</span><span class="p">):</span>
|
||||
</span><span id="coerce_type-44"><a href="#coerce_type-44"><span class="linenos">44</span></a> <span class="n">_coerce_date</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="n">node</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"low"</span><span class="p">])</span>
|
||||
</span><span id="coerce_type-45"><a href="#coerce_type-45"><span class="linenos">45</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">Extract</span><span class="p">):</span>
|
||||
</span><span id="coerce_type-46"><a href="#coerce_type-46"><span class="linenos">46</span></a> <span class="k">if</span> <span class="n">node</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">this</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEMPORAL_TYPES</span><span class="p">:</span>
|
||||
</span><span id="coerce_type-47"><a href="#coerce_type-47"><span class="linenos">47</span></a> <span class="n">_replace_cast</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="s2">"datetime"</span><span class="p">)</span>
|
||||
</span><span id="coerce_type-48"><a href="#coerce_type-48"><span class="linenos">48</span></a> <span class="k">return</span> <span class="n">node</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
|
@ -244,15 +273,41 @@ conversions rely on type inference.</p>
|
|||
|
||||
</div>
|
||||
<a class="headerlink" href="#remove_redundant_casts"></a>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="remove_redundant_casts-45"><a href="#remove_redundant_casts-45"><span class="linenos">45</span></a><span class="k">def</span> <span class="nf">remove_redundant_casts</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
||||
</span><span id="remove_redundant_casts-46"><a href="#remove_redundant_casts-46"><span class="linenos">46</span></a> <span class="k">if</span> <span class="p">(</span>
|
||||
</span><span id="remove_redundant_casts-47"><a href="#remove_redundant_casts-47"><span class="linenos">47</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">)</span>
|
||||
</span><span id="remove_redundant_casts-48"><a href="#remove_redundant_casts-48"><span class="linenos">48</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">type</span>
|
||||
</span><span id="remove_redundant_casts-49"><a href="#remove_redundant_casts-49"><span class="linenos">49</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">type</span>
|
||||
</span><span id="remove_redundant_casts-50"><a href="#remove_redundant_casts-50"><span class="linenos">50</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span>
|
||||
</span><span id="remove_redundant_casts-51"><a href="#remove_redundant_casts-51"><span class="linenos">51</span></a> <span class="p">):</span>
|
||||
</span><span id="remove_redundant_casts-52"><a href="#remove_redundant_casts-52"><span class="linenos">52</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span>
|
||||
</span><span id="remove_redundant_casts-53"><a href="#remove_redundant_casts-53"><span class="linenos">53</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="remove_redundant_casts-51"><a href="#remove_redundant_casts-51"><span class="linenos">51</span></a><span class="k">def</span> <span class="nf">remove_redundant_casts</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
||||
</span><span id="remove_redundant_casts-52"><a href="#remove_redundant_casts-52"><span class="linenos">52</span></a> <span class="k">if</span> <span class="p">(</span>
|
||||
</span><span id="remove_redundant_casts-53"><a href="#remove_redundant_casts-53"><span class="linenos">53</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">)</span>
|
||||
</span><span id="remove_redundant_casts-54"><a href="#remove_redundant_casts-54"><span class="linenos">54</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">type</span>
|
||||
</span><span id="remove_redundant_casts-55"><a href="#remove_redundant_casts-55"><span class="linenos">55</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">type</span>
|
||||
</span><span id="remove_redundant_casts-56"><a href="#remove_redundant_casts-56"><span class="linenos">56</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">type</span><span class="o">.</span><span class="n">this</span>
|
||||
</span><span id="remove_redundant_casts-57"><a href="#remove_redundant_casts-57"><span class="linenos">57</span></a> <span class="p">):</span>
|
||||
</span><span id="remove_redundant_casts-58"><a href="#remove_redundant_casts-58"><span class="linenos">58</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span>
|
||||
</span><span id="remove_redundant_casts-59"><a href="#remove_redundant_casts-59"><span class="linenos">59</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
||||
|
||||
</section>
|
||||
<section id="ensure_bool_predicates">
|
||||
<input id="ensure_bool_predicates-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
||||
<div class="attr function">
|
||||
|
||||
<span class="def">def</span>
|
||||
<span class="name">ensure_bool_predicates</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="../expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="../expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span>
|
||||
|
||||
<label class="view-source-button" for="ensure_bool_predicates-view-source"><span>View Source</span></label>
|
||||
|
||||
</div>
|
||||
<a class="headerlink" href="#ensure_bool_predicates"></a>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="ensure_bool_predicates-62"><a href="#ensure_bool_predicates-62"><span class="linenos">62</span></a><span class="k">def</span> <span class="nf">ensure_bool_predicates</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span>
|
||||
</span><span id="ensure_bool_predicates-63"><a href="#ensure_bool_predicates-63"><span class="linenos">63</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">Connector</span><span class="p">):</span>
|
||||
</span><span id="ensure_bool_predicates-64"><a href="#ensure_bool_predicates-64"><span class="linenos">64</span></a> <span class="n">_replace_int_predicate</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">left</span><span class="p">)</span>
|
||||
</span><span id="ensure_bool_predicates-65"><a href="#ensure_bool_predicates-65"><span class="linenos">65</span></a> <span class="n">_replace_int_predicate</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">right</span><span class="p">)</span>
|
||||
</span><span id="ensure_bool_predicates-66"><a href="#ensure_bool_predicates-66"><span class="linenos">66</span></a>
|
||||
</span><span id="ensure_bool_predicates-67"><a href="#ensure_bool_predicates-67"><span class="linenos">67</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Having</span><span class="p">)):</span>
|
||||
</span><span id="ensure_bool_predicates-68"><a href="#ensure_bool_predicates-68"><span class="linenos">68</span></a> <span class="n">_replace_int_predicate</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">)</span>
|
||||
</span><span id="ensure_bool_predicates-69"><a href="#ensure_bool_predicates-69"><span class="linenos">69</span></a>
|
||||
</span><span id="ensure_bool_predicates-70"><a href="#ensure_bool_predicates-70"><span class="linenos">70</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
|
|
|||
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|
|
@ -62,99 +62,99 @@
|
|||
<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="nn">collections</span> <span class="kn">import</span> <span class="n">defaultdict</span>
|
||||
</span><span id="L-2"><a href="#L-2"><span class="linenos"> 2</span></a>
|
||||
</span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a><span class="kn">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">alias</span><span class="p">,</span> <span class="n">exp</span>
|
||||
</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a><span class="kn">from</span> <span class="nn">sqlglot.helper</span> <span class="kn">import</span> <span class="n">flatten</span>
|
||||
</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.qualify_columns</span> <span class="kn">import</span> <span class="n">Resolver</span>
|
||||
</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.scope</span> <span class="kn">import</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">traverse_scope</span>
|
||||
</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span> <span class="nn">sqlglot.schema</span> <span class="kn">import</span> <span class="n">ensure_schema</span>
|
||||
</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a>
|
||||
</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="c1"># Sentinel value that means an outer query selecting ALL columns</span>
|
||||
</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a><span class="n">SELECT_ALL</span> <span class="o">=</span> <span class="nb">object</span><span class="p">()</span>
|
||||
</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a>
|
||||
</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a><span class="c1"># Selection to use if selection list is empty</span>
|
||||
</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a><span class="n">DEFAULT_SELECTION</span> <span class="o">=</span> <span class="k">lambda</span><span class="p">:</span> <span class="n">alias</span><span class="p">(</span><span class="s2">"1"</span><span class="p">,</span> <span class="s2">"_"</span><span class="p">)</span>
|
||||
</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.qualify_columns</span> <span class="kn">import</span> <span class="n">Resolver</span>
|
||||
</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.scope</span> <span class="kn">import</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">traverse_scope</span>
|
||||
</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="kn">from</span> <span class="nn">sqlglot.schema</span> <span class="kn">import</span> <span class="n">ensure_schema</span>
|
||||
</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a>
|
||||
</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="c1"># Sentinel value that means an outer query selecting ALL columns</span>
|
||||
</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="n">SELECT_ALL</span> <span class="o">=</span> <span class="nb">object</span><span class="p">()</span>
|
||||
</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a>
|
||||
</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a><span class="c1"># Selection to use if selection list is empty</span>
|
||||
</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a><span class="n">DEFAULT_SELECTION</span> <span class="o">=</span> <span class="k">lambda</span><span class="p">:</span> <span class="n">alias</span><span class="p">(</span><span class="s2">"1"</span><span class="p">,</span> <span class="s2">"_"</span><span class="p">)</span>
|
||||
</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a>
|
||||
</span><span id="L-14"><a href="#L-14"><span class="linenos"> 14</span></a>
|
||||
</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a>
|
||||
</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a><span class="k">def</span> <span class="nf">pushdown_projections</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">schema</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">remove_unused_selections</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span>
|
||||
</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a><span class="w"> </span><span class="sd">"""</span>
|
||||
</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="sd"> Rewrite sqlglot AST to remove unused columns projections.</span>
|
||||
</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a>
|
||||
</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="sd"> Example:</span>
|
||||
</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> >>> import sqlglot</span>
|
||||
</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> >>> sql = "SELECT y.a AS a FROM (SELECT x.a AS a, x.b AS b FROM x) AS y"</span>
|
||||
</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> >>> expression = sqlglot.parse_one(sql)</span>
|
||||
</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> >>> pushdown_projections(expression).sql()</span>
|
||||
</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a><span class="sd"> 'SELECT y.a AS a FROM (SELECT x.a AS a FROM x) AS y'</span>
|
||||
</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a>
|
||||
</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a><span class="sd"> Args:</span>
|
||||
</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a><span class="sd"> expression (sqlglot.Expression): expression to optimize</span>
|
||||
</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a><span class="sd"> remove_unused_selections (bool): remove selects that are unused</span>
|
||||
</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a><span class="sd"> Returns:</span>
|
||||
</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a><span class="sd"> sqlglot.Expression: optimized expression</span>
|
||||
</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a><span class="sd"> """</span>
|
||||
</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a> <span class="c1"># Map of Scope to all columns being selected by outer queries.</span>
|
||||
</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</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>
|
||||
</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="n">referenced_columns</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
|
||||
</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a>
|
||||
</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="c1"># We build the scope tree (which is traversed in DFS postorder), then iterate</span>
|
||||
</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="c1"># over the result in reverse order. This should ensure that the set of selected</span>
|
||||
</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> <span class="c1"># columns for a particular scope are completely build by the time we get to it.</span>
|
||||
</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)):</span>
|
||||
</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="n">referenced_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">})</span>
|
||||
</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a>
|
||||
</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</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">"distinct"</span><span class="p">):</span>
|
||||
</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="c1"># We can't remove columns SELECT DISTINCT nor UNION DISTINCT</span>
|
||||
</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span>
|
||||
</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a>
|
||||
</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">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">Union</span><span class="p">):</span>
|
||||
</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span>
|
||||
</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
|
||||
</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a>
|
||||
</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
||||
</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
|
||||
</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
||||
</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span>
|
||||
</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span>
|
||||
</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span>
|
||||
</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">parent_selections</span>
|
||||
</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="p">]</span>
|
||||
</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a>
|
||||
</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</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-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="k">if</span> <span class="n">remove_unused_selections</span><span class="p">:</span>
|
||||
</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="n">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span>
|
||||
</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a>
|
||||
</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="c1"># Group columns by source name</span>
|
||||
</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
|
||||
</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <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">columns</span><span class="p">:</span>
|
||||
</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span>
|
||||
</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="n">col_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span>
|
||||
</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">col_name</span><span class="p">)</span>
|
||||
</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a>
|
||||
</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="c1"># Push the selected columns down to the next scope</span>
|
||||
</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">_</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</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><span id="L-73"><a href="#L-73"><span class="linenos"> 73</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">Scope</span><span class="p">):</span>
|
||||
</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">selects</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="nb">set</span><span class="p">()</span>
|
||||
</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">source</span><span class="p">]</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-76"><a href="#L-76"><span class="linenos"> 76</span></a>
|
||||
</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a><span class="k">def</span> <span class="nf">pushdown_projections</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">schema</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">remove_unused_selections</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span>
|
||||
</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a><span class="w"> </span><span class="sd">"""</span>
|
||||
</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a><span class="sd"> Rewrite sqlglot AST to remove unused columns projections.</span>
|
||||
</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a>
|
||||
</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a><span class="sd"> Example:</span>
|
||||
</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="sd"> >>> import sqlglot</span>
|
||||
</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> >>> sql = "SELECT y.a AS a FROM (SELECT x.a AS a, x.b AS b FROM x) AS y"</span>
|
||||
</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> >>> expression = sqlglot.parse_one(sql)</span>
|
||||
</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> >>> pushdown_projections(expression).sql()</span>
|
||||
</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> 'SELECT y.a AS a FROM (SELECT x.a AS a FROM x) AS y'</span>
|
||||
</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a>
|
||||
</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a><span class="sd"> Args:</span>
|
||||
</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a><span class="sd"> expression (sqlglot.Expression): expression to optimize</span>
|
||||
</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a><span class="sd"> remove_unused_selections (bool): remove selects that are unused</span>
|
||||
</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a><span class="sd"> Returns:</span>
|
||||
</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a><span class="sd"> sqlglot.Expression: optimized expression</span>
|
||||
</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a><span class="sd"> """</span>
|
||||
</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> <span class="c1"># Map of Scope to all columns being selected by outer queries.</span>
|
||||
</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</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>
|
||||
</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="n">referenced_columns</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
|
||||
</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a>
|
||||
</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="c1"># We build the scope tree (which is traversed in DFS postorder), then iterate</span>
|
||||
</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="c1"># over the result in reverse order. This should ensure that the set of selected</span>
|
||||
</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="c1"># columns for a particular scope are completely build by the time we get to it.</span>
|
||||
</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)):</span>
|
||||
</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="n">referenced_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">})</span>
|
||||
</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a>
|
||||
</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</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">"distinct"</span><span class="p">):</span>
|
||||
</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="c1"># We can't remove columns SELECT DISTINCT nor UNION DISTINCT</span>
|
||||
</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span>
|
||||
</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a>
|
||||
</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</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">Union</span><span class="p">):</span>
|
||||
</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span>
|
||||
</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
|
||||
</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a>
|
||||
</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
||||
</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
|
||||
</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
||||
</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span>
|
||||
</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span>
|
||||
</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span>
|
||||
</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">parent_selections</span>
|
||||
</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="p">]</span>
|
||||
</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a>
|
||||
</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</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-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="k">if</span> <span class="n">remove_unused_selections</span><span class="p">:</span>
|
||||
</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="n">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span>
|
||||
</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a>
|
||||
</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="c1"># Group columns by source name</span>
|
||||
</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
|
||||
</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <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">columns</span><span class="p">:</span>
|
||||
</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span>
|
||||
</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="n">col_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span>
|
||||
</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">col_name</span><span class="p">)</span>
|
||||
</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a>
|
||||
</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="c1"># Push the selected columns down to the next scope</span>
|
||||
</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">_</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</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><span id="L-72"><a href="#L-72"><span class="linenos"> 72</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">Scope</span><span class="p">):</span>
|
||||
</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">selects</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="nb">set</span><span class="p">()</span>
|
||||
</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">source</span><span class="p">]</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-75"><a href="#L-75"><span class="linenos"> 75</span></a>
|
||||
</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a>
|
||||
</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a>
|
||||
</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a>
|
||||
</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a><span class="k">def</span> <span class="nf">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">):</span>
|
||||
</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="n">order</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="s2">"order"</span><span class="p">)</span>
|
||||
</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a>
|
||||
</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="k">if</span> <span class="n">order</span><span class="p">:</span>
|
||||
</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="c1"># Assume columns without a qualified table are references to output columns</span>
|
||||
</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="n">order_refs</span> <span class="o">=</span> <span class="p">{</span><span class="n">c</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">order</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span><span class="p">}</span>
|
||||
</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="k">else</span><span class="p">:</span>
|
||||
</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="n">order_refs</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
|
||||
</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a>
|
||||
</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">list</span><span class="p">)</span>
|
||||
</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="n">removed</span> <span class="o">=</span> <span class="kc">False</span>
|
||||
</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="n">star</span> <span class="o">=</span> <span class="kc">False</span>
|
||||
</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a><span class="k">def</span> <span class="nf">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">):</span>
|
||||
</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="n">order</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="s2">"order"</span><span class="p">)</span>
|
||||
</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a>
|
||||
</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="k">if</span> <span class="n">order</span><span class="p">:</span>
|
||||
</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="c1"># Assume columns without a qualified table are references to output columns</span>
|
||||
</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="n">order_refs</span> <span class="o">=</span> <span class="p">{</span><span class="n">c</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">order</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span><span class="p">}</span>
|
||||
</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="k">else</span><span class="p">:</span>
|
||||
</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="n">order_refs</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
|
||||
</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a>
|
||||
</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span>
|
||||
</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="n">removed</span> <span class="o">=</span> <span class="kc">False</span>
|
||||
</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="n">star</span> <span class="o">=</span> <span class="kc">False</span>
|
||||
</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a>
|
||||
</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="k">for</span> <span class="n">selection</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span>
|
||||
</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">selection</span><span class="o">.</span><span class="n">alias_or_name</span>
|
||||
</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a>
|
||||
</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">order_refs</span><span class="p">:</span>
|
||||
</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="n">new_selections</span><span class="p">[</span><span class="n">name</span><span class="p">]</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-96"><a href="#L-96"><span class="linenos"> 96</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-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="k">else</span><span class="p">:</span>
|
||||
</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="k">if</span> <span class="n">selection</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span>
|
||||
</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="n">star</span> <span class="o">=</span> <span class="kc">True</span>
|
||||
|
|
@ -162,21 +162,20 @@
|
|||
</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a>
|
||||
</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="k">if</span> <span class="n">star</span><span class="p">:</span>
|
||||
</span><span id="L-103"><a href="#L-103"><span class="linenos">103</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><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a>
|
||||
</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">parent_selections</span><span class="p">):</span>
|
||||
</span><span id="L-106"><a href="#L-106"><span class="linenos">106</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">new_selections</span><span class="p">:</span>
|
||||
</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="n">new_selections</span><span class="p">[</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
|
||||
</span><span id="L-108"><a href="#L-108"><span class="linenos">108</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">resolver</span><span class="o">.</span><span class="n">get_table</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-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="p">)</span>
|
||||
</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a>
|
||||
</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="c1"># If there are no remaining selections, just select a single constant</span>
|
||||
</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">new_selections</span><span class="p">:</span>
|
||||
</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="n">new_selections</span><span class="p">[</span><span class="s2">""</span><span class="p">]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">DEFAULT_SELECTION</span><span class="p">())</span>
|
||||
</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a>
|
||||
</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">flatten</span><span class="p">(</span><span class="n">new_selections</span><span class="o">.</span><span class="n">values</span><span class="p">()),</span> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
||||
</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a>
|
||||
</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="k">if</span> <span class="n">removed</span><span class="p">:</span>
|
||||
</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span>
|
||||
</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="n">names</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">new_selections</span><span class="p">}</span>
|
||||
</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a>
|
||||
</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">parent_selections</span><span class="p">):</span>
|
||||
</span><span id="L-107"><a href="#L-107"><span class="linenos">107</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">names</span><span class="p">:</span>
|
||||
</span><span id="L-108"><a href="#L-108"><span class="linenos">108</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">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">resolver</span><span class="o">.</span><span class="n">get_table</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-109"><a href="#L-109"><span class="linenos">109</span></a>
|
||||
</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="c1"># If there are no remaining selections, just select a single constant</span>
|
||||
</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">new_selections</span><span class="p">:</span>
|
||||
</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">DEFAULT_SELECTION</span><span class="p">())</span>
|
||||
</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a>
|
||||
</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">new_selections</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
||||
</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a>
|
||||
</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="k">if</span> <span class="n">removed</span><span class="p">:</span>
|
||||
</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
|
@ -192,7 +191,7 @@
|
|||
|
||||
</div>
|
||||
<a class="headerlink" href="#DEFAULT_SELECTION"></a>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="DEFAULT_SELECTION-14"><a href="#DEFAULT_SELECTION-14"><span class="linenos">14</span></a><span class="n">DEFAULT_SELECTION</span> <span class="o">=</span> <span class="k">lambda</span><span class="p">:</span> <span class="n">alias</span><span class="p">(</span><span class="s2">"1"</span><span class="p">,</span> <span class="s2">"_"</span><span class="p">)</span>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="DEFAULT_SELECTION-13"><a href="#DEFAULT_SELECTION-13"><span class="linenos">13</span></a><span class="n">DEFAULT_SELECTION</span> <span class="o">=</span> <span class="k">lambda</span><span class="p">:</span> <span class="n">alias</span><span class="p">(</span><span class="s2">"1"</span><span class="p">,</span> <span class="s2">"_"</span><span class="p">)</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
|
@ -210,68 +209,68 @@
|
|||
|
||||
</div>
|
||||
<a class="headerlink" href="#pushdown_projections"></a>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="pushdown_projections-17"><a href="#pushdown_projections-17"><span class="linenos">17</span></a><span class="k">def</span> <span class="nf">pushdown_projections</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">schema</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">remove_unused_selections</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-18"><a href="#pushdown_projections-18"><span class="linenos">18</span></a><span class="w"> </span><span class="sd">"""</span>
|
||||
</span><span id="pushdown_projections-19"><a href="#pushdown_projections-19"><span class="linenos">19</span></a><span class="sd"> Rewrite sqlglot AST to remove unused columns projections.</span>
|
||||
</span><span id="pushdown_projections-20"><a href="#pushdown_projections-20"><span class="linenos">20</span></a>
|
||||
</span><span id="pushdown_projections-21"><a href="#pushdown_projections-21"><span class="linenos">21</span></a><span class="sd"> Example:</span>
|
||||
</span><span id="pushdown_projections-22"><a href="#pushdown_projections-22"><span class="linenos">22</span></a><span class="sd"> >>> import sqlglot</span>
|
||||
</span><span id="pushdown_projections-23"><a href="#pushdown_projections-23"><span class="linenos">23</span></a><span class="sd"> >>> sql = "SELECT y.a AS a FROM (SELECT x.a AS a, x.b AS b FROM x) AS y"</span>
|
||||
</span><span id="pushdown_projections-24"><a href="#pushdown_projections-24"><span class="linenos">24</span></a><span class="sd"> >>> expression = sqlglot.parse_one(sql)</span>
|
||||
</span><span id="pushdown_projections-25"><a href="#pushdown_projections-25"><span class="linenos">25</span></a><span class="sd"> >>> pushdown_projections(expression).sql()</span>
|
||||
</span><span id="pushdown_projections-26"><a href="#pushdown_projections-26"><span class="linenos">26</span></a><span class="sd"> 'SELECT y.a AS a FROM (SELECT x.a AS a FROM x) AS y'</span>
|
||||
</span><span id="pushdown_projections-27"><a href="#pushdown_projections-27"><span class="linenos">27</span></a>
|
||||
</span><span id="pushdown_projections-28"><a href="#pushdown_projections-28"><span class="linenos">28</span></a><span class="sd"> Args:</span>
|
||||
</span><span id="pushdown_projections-29"><a href="#pushdown_projections-29"><span class="linenos">29</span></a><span class="sd"> expression (sqlglot.Expression): expression to optimize</span>
|
||||
</span><span id="pushdown_projections-30"><a href="#pushdown_projections-30"><span class="linenos">30</span></a><span class="sd"> remove_unused_selections (bool): remove selects that are unused</span>
|
||||
</span><span id="pushdown_projections-31"><a href="#pushdown_projections-31"><span class="linenos">31</span></a><span class="sd"> Returns:</span>
|
||||
</span><span id="pushdown_projections-32"><a href="#pushdown_projections-32"><span class="linenos">32</span></a><span class="sd"> sqlglot.Expression: optimized expression</span>
|
||||
</span><span id="pushdown_projections-33"><a href="#pushdown_projections-33"><span class="linenos">33</span></a><span class="sd"> """</span>
|
||||
</span><span id="pushdown_projections-34"><a href="#pushdown_projections-34"><span class="linenos">34</span></a> <span class="c1"># Map of Scope to all columns being selected by outer queries.</span>
|
||||
</span><span id="pushdown_projections-35"><a href="#pushdown_projections-35"><span class="linenos">35</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>
|
||||
</span><span id="pushdown_projections-36"><a href="#pushdown_projections-36"><span class="linenos">36</span></a> <span class="n">referenced_columns</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-37"><a href="#pushdown_projections-37"><span class="linenos">37</span></a>
|
||||
</span><span id="pushdown_projections-38"><a href="#pushdown_projections-38"><span class="linenos">38</span></a> <span class="c1"># We build the scope tree (which is traversed in DFS postorder), then iterate</span>
|
||||
</span><span id="pushdown_projections-39"><a href="#pushdown_projections-39"><span class="linenos">39</span></a> <span class="c1"># over the result in reverse order. This should ensure that the set of selected</span>
|
||||
</span><span id="pushdown_projections-40"><a href="#pushdown_projections-40"><span class="linenos">40</span></a> <span class="c1"># columns for a particular scope are completely build by the time we get to it.</span>
|
||||
</span><span id="pushdown_projections-41"><a href="#pushdown_projections-41"><span class="linenos">41</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)):</span>
|
||||
</span><span id="pushdown_projections-42"><a href="#pushdown_projections-42"><span class="linenos">42</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="n">referenced_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">})</span>
|
||||
</span><span id="pushdown_projections-43"><a href="#pushdown_projections-43"><span class="linenos">43</span></a>
|
||||
</span><span id="pushdown_projections-44"><a href="#pushdown_projections-44"><span class="linenos">44</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">"distinct"</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-45"><a href="#pushdown_projections-45"><span class="linenos">45</span></a> <span class="c1"># We can't remove columns SELECT DISTINCT nor UNION DISTINCT</span>
|
||||
</span><span id="pushdown_projections-46"><a href="#pushdown_projections-46"><span class="linenos">46</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span>
|
||||
</span><span id="pushdown_projections-47"><a href="#pushdown_projections-47"><span class="linenos">47</span></a>
|
||||
</span><span id="pushdown_projections-48"><a href="#pushdown_projections-48"><span class="linenos">48</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">Union</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-49"><a href="#pushdown_projections-49"><span class="linenos">49</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span>
|
||||
</span><span id="pushdown_projections-50"><a href="#pushdown_projections-50"><span class="linenos">50</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
|
||||
</span><span id="pushdown_projections-51"><a href="#pushdown_projections-51"><span class="linenos">51</span></a>
|
||||
</span><span id="pushdown_projections-52"><a href="#pushdown_projections-52"><span class="linenos">52</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-53"><a href="#pushdown_projections-53"><span class="linenos">53</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
|
||||
</span><span id="pushdown_projections-54"><a href="#pushdown_projections-54"><span class="linenos">54</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-55"><a href="#pushdown_projections-55"><span class="linenos">55</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span>
|
||||
</span><span id="pushdown_projections-56"><a href="#pushdown_projections-56"><span class="linenos">56</span></a> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span>
|
||||
</span><span id="pushdown_projections-57"><a href="#pushdown_projections-57"><span class="linenos">57</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-58"><a href="#pushdown_projections-58"><span class="linenos">58</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">parent_selections</span>
|
||||
</span><span id="pushdown_projections-59"><a href="#pushdown_projections-59"><span class="linenos">59</span></a> <span class="p">]</span>
|
||||
</span><span id="pushdown_projections-60"><a href="#pushdown_projections-60"><span class="linenos">60</span></a>
|
||||
</span><span id="pushdown_projections-61"><a href="#pushdown_projections-61"><span class="linenos">61</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="pushdown_projections-62"><a href="#pushdown_projections-62"><span class="linenos">62</span></a> <span class="k">if</span> <span class="n">remove_unused_selections</span><span class="p">:</span>
|
||||
</span><span id="pushdown_projections-63"><a href="#pushdown_projections-63"><span class="linenos">63</span></a> <span class="n">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-64"><a href="#pushdown_projections-64"><span class="linenos">64</span></a>
|
||||
</span><span id="pushdown_projections-65"><a href="#pushdown_projections-65"><span class="linenos">65</span></a> <span class="c1"># Group columns by source name</span>
|
||||
</span><span id="pushdown_projections-66"><a href="#pushdown_projections-66"><span class="linenos">66</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-67"><a href="#pushdown_projections-67"><span class="linenos">67</span></a> <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">columns</span><span class="p">:</span>
|
||||
</span><span id="pushdown_projections-68"><a href="#pushdown_projections-68"><span class="linenos">68</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span>
|
||||
</span><span id="pushdown_projections-69"><a href="#pushdown_projections-69"><span class="linenos">69</span></a> <span class="n">col_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span>
|
||||
</span><span id="pushdown_projections-70"><a href="#pushdown_projections-70"><span class="linenos">70</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">col_name</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-71"><a href="#pushdown_projections-71"><span class="linenos">71</span></a>
|
||||
</span><span id="pushdown_projections-72"><a href="#pushdown_projections-72"><span class="linenos">72</span></a> <span class="c1"># Push the selected columns down to the next scope</span>
|
||||
</span><span id="pushdown_projections-73"><a href="#pushdown_projections-73"><span class="linenos">73</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">_</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</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><span id="pushdown_projections-74"><a href="#pushdown_projections-74"><span class="linenos">74</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">Scope</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-75"><a href="#pushdown_projections-75"><span class="linenos">75</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">selects</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="nb">set</span><span class="p">()</span>
|
||||
</span><span id="pushdown_projections-76"><a href="#pushdown_projections-76"><span class="linenos">76</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">source</span><span class="p">]</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="pushdown_projections-77"><a href="#pushdown_projections-77"><span class="linenos">77</span></a>
|
||||
</span><span id="pushdown_projections-78"><a href="#pushdown_projections-78"><span class="linenos">78</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="pushdown_projections-16"><a href="#pushdown_projections-16"><span class="linenos">16</span></a><span class="k">def</span> <span class="nf">pushdown_projections</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">schema</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">remove_unused_selections</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-17"><a href="#pushdown_projections-17"><span class="linenos">17</span></a><span class="w"> </span><span class="sd">"""</span>
|
||||
</span><span id="pushdown_projections-18"><a href="#pushdown_projections-18"><span class="linenos">18</span></a><span class="sd"> Rewrite sqlglot AST to remove unused columns projections.</span>
|
||||
</span><span id="pushdown_projections-19"><a href="#pushdown_projections-19"><span class="linenos">19</span></a>
|
||||
</span><span id="pushdown_projections-20"><a href="#pushdown_projections-20"><span class="linenos">20</span></a><span class="sd"> Example:</span>
|
||||
</span><span id="pushdown_projections-21"><a href="#pushdown_projections-21"><span class="linenos">21</span></a><span class="sd"> >>> import sqlglot</span>
|
||||
</span><span id="pushdown_projections-22"><a href="#pushdown_projections-22"><span class="linenos">22</span></a><span class="sd"> >>> sql = "SELECT y.a AS a FROM (SELECT x.a AS a, x.b AS b FROM x) AS y"</span>
|
||||
</span><span id="pushdown_projections-23"><a href="#pushdown_projections-23"><span class="linenos">23</span></a><span class="sd"> >>> expression = sqlglot.parse_one(sql)</span>
|
||||
</span><span id="pushdown_projections-24"><a href="#pushdown_projections-24"><span class="linenos">24</span></a><span class="sd"> >>> pushdown_projections(expression).sql()</span>
|
||||
</span><span id="pushdown_projections-25"><a href="#pushdown_projections-25"><span class="linenos">25</span></a><span class="sd"> 'SELECT y.a AS a FROM (SELECT x.a AS a FROM x) AS y'</span>
|
||||
</span><span id="pushdown_projections-26"><a href="#pushdown_projections-26"><span class="linenos">26</span></a>
|
||||
</span><span id="pushdown_projections-27"><a href="#pushdown_projections-27"><span class="linenos">27</span></a><span class="sd"> Args:</span>
|
||||
</span><span id="pushdown_projections-28"><a href="#pushdown_projections-28"><span class="linenos">28</span></a><span class="sd"> expression (sqlglot.Expression): expression to optimize</span>
|
||||
</span><span id="pushdown_projections-29"><a href="#pushdown_projections-29"><span class="linenos">29</span></a><span class="sd"> remove_unused_selections (bool): remove selects that are unused</span>
|
||||
</span><span id="pushdown_projections-30"><a href="#pushdown_projections-30"><span class="linenos">30</span></a><span class="sd"> Returns:</span>
|
||||
</span><span id="pushdown_projections-31"><a href="#pushdown_projections-31"><span class="linenos">31</span></a><span class="sd"> sqlglot.Expression: optimized expression</span>
|
||||
</span><span id="pushdown_projections-32"><a href="#pushdown_projections-32"><span class="linenos">32</span></a><span class="sd"> """</span>
|
||||
</span><span id="pushdown_projections-33"><a href="#pushdown_projections-33"><span class="linenos">33</span></a> <span class="c1"># Map of Scope to all columns being selected by outer queries.</span>
|
||||
</span><span id="pushdown_projections-34"><a href="#pushdown_projections-34"><span class="linenos">34</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>
|
||||
</span><span id="pushdown_projections-35"><a href="#pushdown_projections-35"><span class="linenos">35</span></a> <span class="n">referenced_columns</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-36"><a href="#pushdown_projections-36"><span class="linenos">36</span></a>
|
||||
</span><span id="pushdown_projections-37"><a href="#pushdown_projections-37"><span class="linenos">37</span></a> <span class="c1"># We build the scope tree (which is traversed in DFS postorder), then iterate</span>
|
||||
</span><span id="pushdown_projections-38"><a href="#pushdown_projections-38"><span class="linenos">38</span></a> <span class="c1"># over the result in reverse order. This should ensure that the set of selected</span>
|
||||
</span><span id="pushdown_projections-39"><a href="#pushdown_projections-39"><span class="linenos">39</span></a> <span class="c1"># columns for a particular scope are completely build by the time we get to it.</span>
|
||||
</span><span id="pushdown_projections-40"><a href="#pushdown_projections-40"><span class="linenos">40</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)):</span>
|
||||
</span><span id="pushdown_projections-41"><a href="#pushdown_projections-41"><span class="linenos">41</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="n">referenced_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">})</span>
|
||||
</span><span id="pushdown_projections-42"><a href="#pushdown_projections-42"><span class="linenos">42</span></a>
|
||||
</span><span id="pushdown_projections-43"><a href="#pushdown_projections-43"><span class="linenos">43</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">"distinct"</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-44"><a href="#pushdown_projections-44"><span class="linenos">44</span></a> <span class="c1"># We can't remove columns SELECT DISTINCT nor UNION DISTINCT</span>
|
||||
</span><span id="pushdown_projections-45"><a href="#pushdown_projections-45"><span class="linenos">45</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span>
|
||||
</span><span id="pushdown_projections-46"><a href="#pushdown_projections-46"><span class="linenos">46</span></a>
|
||||
</span><span id="pushdown_projections-47"><a href="#pushdown_projections-47"><span class="linenos">47</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">Union</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-48"><a href="#pushdown_projections-48"><span class="linenos">48</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span>
|
||||
</span><span id="pushdown_projections-49"><a href="#pushdown_projections-49"><span class="linenos">49</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
|
||||
</span><span id="pushdown_projections-50"><a href="#pushdown_projections-50"><span class="linenos">50</span></a>
|
||||
</span><span id="pushdown_projections-51"><a href="#pushdown_projections-51"><span class="linenos">51</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-52"><a href="#pushdown_projections-52"><span class="linenos">52</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
|
||||
</span><span id="pushdown_projections-53"><a href="#pushdown_projections-53"><span class="linenos">53</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-54"><a href="#pushdown_projections-54"><span class="linenos">54</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span>
|
||||
</span><span id="pushdown_projections-55"><a href="#pushdown_projections-55"><span class="linenos">55</span></a> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span>
|
||||
</span><span id="pushdown_projections-56"><a href="#pushdown_projections-56"><span class="linenos">56</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-57"><a href="#pushdown_projections-57"><span class="linenos">57</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">parent_selections</span>
|
||||
</span><span id="pushdown_projections-58"><a href="#pushdown_projections-58"><span class="linenos">58</span></a> <span class="p">]</span>
|
||||
</span><span id="pushdown_projections-59"><a href="#pushdown_projections-59"><span class="linenos">59</span></a>
|
||||
</span><span id="pushdown_projections-60"><a href="#pushdown_projections-60"><span class="linenos">60</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="pushdown_projections-61"><a href="#pushdown_projections-61"><span class="linenos">61</span></a> <span class="k">if</span> <span class="n">remove_unused_selections</span><span class="p">:</span>
|
||||
</span><span id="pushdown_projections-62"><a href="#pushdown_projections-62"><span class="linenos">62</span></a> <span class="n">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-63"><a href="#pushdown_projections-63"><span class="linenos">63</span></a>
|
||||
</span><span id="pushdown_projections-64"><a href="#pushdown_projections-64"><span class="linenos">64</span></a> <span class="c1"># Group columns by source name</span>
|
||||
</span><span id="pushdown_projections-65"><a href="#pushdown_projections-65"><span class="linenos">65</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-66"><a href="#pushdown_projections-66"><span class="linenos">66</span></a> <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">columns</span><span class="p">:</span>
|
||||
</span><span id="pushdown_projections-67"><a href="#pushdown_projections-67"><span class="linenos">67</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span>
|
||||
</span><span id="pushdown_projections-68"><a href="#pushdown_projections-68"><span class="linenos">68</span></a> <span class="n">col_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span>
|
||||
</span><span id="pushdown_projections-69"><a href="#pushdown_projections-69"><span class="linenos">69</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">col_name</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-70"><a href="#pushdown_projections-70"><span class="linenos">70</span></a>
|
||||
</span><span id="pushdown_projections-71"><a href="#pushdown_projections-71"><span class="linenos">71</span></a> <span class="c1"># Push the selected columns down to the next scope</span>
|
||||
</span><span id="pushdown_projections-72"><a href="#pushdown_projections-72"><span class="linenos">72</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">_</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</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><span id="pushdown_projections-73"><a href="#pushdown_projections-73"><span class="linenos">73</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">Scope</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-74"><a href="#pushdown_projections-74"><span class="linenos">74</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">selects</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="nb">set</span><span class="p">()</span>
|
||||
</span><span id="pushdown_projections-75"><a href="#pushdown_projections-75"><span class="linenos">75</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">source</span><span class="p">]</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="pushdown_projections-76"><a href="#pushdown_projections-76"><span class="linenos">76</span></a>
|
||||
</span><span id="pushdown_projections-77"><a href="#pushdown_projections-77"><span class="linenos">77</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
|
|
|||
File diff suppressed because it is too large
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|
|
@ -92,41 +92,39 @@
|
|||
</span><span id="L-34"><a href="#L-34"><span class="linenos">34</span></a> <span class="n">derived_table</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="n">alias_</span><span class="p">)))</span>
|
||||
</span><span id="L-35"><a href="#L-35"><span class="linenos">35</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">rename_source</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">alias_</span><span class="p">)</span>
|
||||
</span><span id="L-36"><a href="#L-36"><span class="linenos">36</span></a>
|
||||
</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a> <span class="k">for</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span>
|
||||
</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
|
||||
</span><span id="L-38"><a href="#L-38"><span class="linenos">38</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="L-39"><a href="#L-39"><span class="linenos">39</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</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-40"><a href="#L-40"><span class="linenos">40</span></a>
|
||||
</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> <span class="k">if</span> <span class="n">identifier</span><span class="p">:</span>
|
||||
</span><span id="L-42"><a href="#L-42"><span class="linenos">42</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</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">"db"</span><span class="p">):</span>
|
||||
</span><span id="L-43"><a href="#L-43"><span class="linenos">43</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"db"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">db</span><span class="p">))</span>
|
||||
</span><span id="L-44"><a href="#L-44"><span class="linenos">44</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</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">"catalog"</span><span class="p">):</span>
|
||||
</span><span id="L-45"><a href="#L-45"><span class="linenos">45</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"catalog"</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">catalog</span><span class="p">))</span>
|
||||
</span><span id="L-46"><a href="#L-46"><span class="linenos">46</span></a>
|
||||
</span><span id="L-47"><a href="#L-47"><span class="linenos">47</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span>
|
||||
</span><span id="L-48"><a href="#L-48"><span class="linenos">48</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span>
|
||||
</span><span id="L-49"><a href="#L-49"><span class="linenos">49</span></a> <span class="n">alias</span><span class="p">(</span>
|
||||
</span><span id="L-50"><a href="#L-50"><span class="linenos">50</span></a> <span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span>
|
||||
</span><span id="L-51"><a href="#L-51"><span class="linenos">51</span></a> <span class="n">source</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="n">identifier</span> <span class="k">else</span> <span class="n">next_name</span><span class="p">(),</span>
|
||||
</span><span id="L-52"><a href="#L-52"><span class="linenos">52</span></a> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
|
||||
</span><span id="L-53"><a href="#L-53"><span class="linenos">53</span></a> <span class="p">)</span>
|
||||
</span><span id="L-54"><a href="#L-54"><span class="linenos">54</span></a> <span class="p">)</span>
|
||||
</span><span id="L-55"><a href="#L-55"><span class="linenos">55</span></a>
|
||||
</span><span id="L-56"><a href="#L-56"><span class="linenos">56</span></a> <span class="k">if</span> <span class="n">schema</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">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span>
|
||||
</span><span id="L-57"><a href="#L-57"><span class="linenos">57</span></a> <span class="k">with</span> <span class="n">csv_reader</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">as</span> <span class="n">reader</span><span class="p">:</span>
|
||||
</span><span id="L-58"><a href="#L-58"><span class="linenos">58</span></a> <span class="n">header</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span>
|
||||
</span><span id="L-59"><a href="#L-59"><span class="linenos">59</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span>
|
||||
</span><span id="L-60"><a href="#L-60"><span class="linenos">60</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">add_table</span><span class="p">(</span>
|
||||
</span><span id="L-61"><a href="#L-61"><span class="linenos">61</span></a> <span class="n">source</span><span class="p">,</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="nb">type</span><span class="p">(</span><span class="n">v</span><span class="p">)</span><span class="o">.</span><span class="vm">__name__</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">header</span><span class="p">,</span> <span class="n">columns</span><span class="p">)}</span>
|
||||
</span><span id="L-62"><a href="#L-62"><span class="linenos">62</span></a> <span class="p">)</span>
|
||||
</span><span id="L-63"><a href="#L-63"><span class="linenos">63</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="n">source</span><span class="o">.</span><span class="n">is_udtf</span><span class="p">:</span>
|
||||
</span><span id="L-64"><a href="#L-64"><span class="linenos">64</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span>
|
||||
</span><span id="L-65"><a href="#L-65"><span class="linenos">65</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">udtf</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">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">next_name</span><span class="p">())</span>
|
||||
</span><span id="L-66"><a href="#L-66"><span class="linenos">66</span></a> <span class="n">udtf</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">table_alias</span><span class="p">)</span>
|
||||
</span><span id="L-67"><a href="#L-67"><span class="linenos">67</span></a>
|
||||
</span><span id="L-68"><a href="#L-68"><span class="linenos">68</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">name</span><span class="p">:</span>
|
||||
</span><span id="L-69"><a href="#L-69"><span class="linenos">69</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">next_name</span><span class="p">())</span>
|
||||
</span><span id="L-70"><a href="#L-70"><span class="linenos">70</span></a>
|
||||
</span><span id="L-71"><a href="#L-71"><span class="linenos">71</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span><span id="L-39"><a href="#L-39"><span class="linenos">39</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</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-40"><a href="#L-40"><span class="linenos">40</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</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">"db"</span><span class="p">):</span>
|
||||
</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"db"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">db</span><span class="p">))</span>
|
||||
</span><span id="L-42"><a href="#L-42"><span class="linenos">42</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</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">"catalog"</span><span class="p">):</span>
|
||||
</span><span id="L-43"><a href="#L-43"><span class="linenos">43</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"catalog"</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">catalog</span><span class="p">))</span>
|
||||
</span><span id="L-44"><a href="#L-44"><span class="linenos">44</span></a>
|
||||
</span><span id="L-45"><a href="#L-45"><span class="linenos">45</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span>
|
||||
</span><span id="L-46"><a href="#L-46"><span class="linenos">46</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span>
|
||||
</span><span id="L-47"><a href="#L-47"><span class="linenos">47</span></a> <span class="n">alias</span><span class="p">(</span>
|
||||
</span><span id="L-48"><a href="#L-48"><span class="linenos">48</span></a> <span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span>
|
||||
</span><span id="L-49"><a href="#L-49"><span class="linenos">49</span></a> <span class="n">name</span> <span class="k">if</span> <span class="n">name</span> <span class="k">else</span> <span class="n">next_name</span><span class="p">(),</span>
|
||||
</span><span id="L-50"><a href="#L-50"><span class="linenos">50</span></a> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
|
||||
</span><span id="L-51"><a href="#L-51"><span class="linenos">51</span></a> <span class="p">)</span>
|
||||
</span><span id="L-52"><a href="#L-52"><span class="linenos">52</span></a> <span class="p">)</span>
|
||||
</span><span id="L-53"><a href="#L-53"><span class="linenos">53</span></a>
|
||||
</span><span id="L-54"><a href="#L-54"><span class="linenos">54</span></a> <span class="k">if</span> <span class="n">schema</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">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span>
|
||||
</span><span id="L-55"><a href="#L-55"><span class="linenos">55</span></a> <span class="k">with</span> <span class="n">csv_reader</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">as</span> <span class="n">reader</span><span class="p">:</span>
|
||||
</span><span id="L-56"><a href="#L-56"><span class="linenos">56</span></a> <span class="n">header</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span>
|
||||
</span><span id="L-57"><a href="#L-57"><span class="linenos">57</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span>
|
||||
</span><span id="L-58"><a href="#L-58"><span class="linenos">58</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">add_table</span><span class="p">(</span>
|
||||
</span><span id="L-59"><a href="#L-59"><span class="linenos">59</span></a> <span class="n">source</span><span class="p">,</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="nb">type</span><span class="p">(</span><span class="n">v</span><span class="p">)</span><span class="o">.</span><span class="vm">__name__</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">header</span><span class="p">,</span> <span class="n">columns</span><span class="p">)}</span>
|
||||
</span><span id="L-60"><a href="#L-60"><span class="linenos">60</span></a> <span class="p">)</span>
|
||||
</span><span id="L-61"><a href="#L-61"><span class="linenos">61</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="n">source</span><span class="o">.</span><span class="n">is_udtf</span><span class="p">:</span>
|
||||
</span><span id="L-62"><a href="#L-62"><span class="linenos">62</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span>
|
||||
</span><span id="L-63"><a href="#L-63"><span class="linenos">63</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">udtf</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">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">next_name</span><span class="p">())</span>
|
||||
</span><span id="L-64"><a href="#L-64"><span class="linenos">64</span></a> <span class="n">udtf</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">table_alias</span><span class="p">)</span>
|
||||
</span><span id="L-65"><a href="#L-65"><span class="linenos">65</span></a>
|
||||
</span><span id="L-66"><a href="#L-66"><span class="linenos">66</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">name</span><span class="p">:</span>
|
||||
</span><span id="L-67"><a href="#L-67"><span class="linenos">67</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">next_name</span><span class="p">())</span>
|
||||
</span><span id="L-68"><a href="#L-68"><span class="linenos">68</span></a>
|
||||
</span><span id="L-69"><a href="#L-69"><span class="linenos">69</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
|
@ -171,41 +169,39 @@
|
|||
</span><span id="qualify_tables-35"><a href="#qualify_tables-35"><span class="linenos">35</span></a> <span class="n">derived_table</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="n">alias_</span><span class="p">)))</span>
|
||||
</span><span id="qualify_tables-36"><a href="#qualify_tables-36"><span class="linenos">36</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">rename_source</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">alias_</span><span class="p">)</span>
|
||||
</span><span id="qualify_tables-37"><a href="#qualify_tables-37"><span class="linenos">37</span></a>
|
||||
</span><span id="qualify_tables-38"><a href="#qualify_tables-38"><span class="linenos">38</span></a> <span class="k">for</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span>
|
||||
</span><span id="qualify_tables-38"><a href="#qualify_tables-38"><span class="linenos">38</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
|
||||
</span><span id="qualify_tables-39"><a href="#qualify_tables-39"><span class="linenos">39</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="qualify_tables-40"><a href="#qualify_tables-40"><span class="linenos">40</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</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="qualify_tables-41"><a href="#qualify_tables-41"><span class="linenos">41</span></a>
|
||||
</span><span id="qualify_tables-42"><a href="#qualify_tables-42"><span class="linenos">42</span></a> <span class="k">if</span> <span class="n">identifier</span><span class="p">:</span>
|
||||
</span><span id="qualify_tables-43"><a href="#qualify_tables-43"><span class="linenos">43</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</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">"db"</span><span class="p">):</span>
|
||||
</span><span id="qualify_tables-44"><a href="#qualify_tables-44"><span class="linenos">44</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"db"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">db</span><span class="p">))</span>
|
||||
</span><span id="qualify_tables-45"><a href="#qualify_tables-45"><span class="linenos">45</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</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">"catalog"</span><span class="p">):</span>
|
||||
</span><span id="qualify_tables-46"><a href="#qualify_tables-46"><span class="linenos">46</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"catalog"</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">catalog</span><span class="p">))</span>
|
||||
</span><span id="qualify_tables-47"><a href="#qualify_tables-47"><span class="linenos">47</span></a>
|
||||
</span><span id="qualify_tables-48"><a href="#qualify_tables-48"><span class="linenos">48</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span>
|
||||
</span><span id="qualify_tables-49"><a href="#qualify_tables-49"><span class="linenos">49</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span>
|
||||
</span><span id="qualify_tables-50"><a href="#qualify_tables-50"><span class="linenos">50</span></a> <span class="n">alias</span><span class="p">(</span>
|
||||
</span><span id="qualify_tables-51"><a href="#qualify_tables-51"><span class="linenos">51</span></a> <span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span>
|
||||
</span><span id="qualify_tables-52"><a href="#qualify_tables-52"><span class="linenos">52</span></a> <span class="n">source</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="n">identifier</span> <span class="k">else</span> <span class="n">next_name</span><span class="p">(),</span>
|
||||
</span><span id="qualify_tables-53"><a href="#qualify_tables-53"><span class="linenos">53</span></a> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
|
||||
</span><span id="qualify_tables-54"><a href="#qualify_tables-54"><span class="linenos">54</span></a> <span class="p">)</span>
|
||||
</span><span id="qualify_tables-55"><a href="#qualify_tables-55"><span class="linenos">55</span></a> <span class="p">)</span>
|
||||
</span><span id="qualify_tables-56"><a href="#qualify_tables-56"><span class="linenos">56</span></a>
|
||||
</span><span id="qualify_tables-57"><a href="#qualify_tables-57"><span class="linenos">57</span></a> <span class="k">if</span> <span class="n">schema</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">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span>
|
||||
</span><span id="qualify_tables-58"><a href="#qualify_tables-58"><span class="linenos">58</span></a> <span class="k">with</span> <span class="n">csv_reader</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">as</span> <span class="n">reader</span><span class="p">:</span>
|
||||
</span><span id="qualify_tables-59"><a href="#qualify_tables-59"><span class="linenos">59</span></a> <span class="n">header</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span>
|
||||
</span><span id="qualify_tables-60"><a href="#qualify_tables-60"><span class="linenos">60</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span>
|
||||
</span><span id="qualify_tables-61"><a href="#qualify_tables-61"><span class="linenos">61</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">add_table</span><span class="p">(</span>
|
||||
</span><span id="qualify_tables-62"><a href="#qualify_tables-62"><span class="linenos">62</span></a> <span class="n">source</span><span class="p">,</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="nb">type</span><span class="p">(</span><span class="n">v</span><span class="p">)</span><span class="o">.</span><span class="vm">__name__</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">header</span><span class="p">,</span> <span class="n">columns</span><span class="p">)}</span>
|
||||
</span><span id="qualify_tables-63"><a href="#qualify_tables-63"><span class="linenos">63</span></a> <span class="p">)</span>
|
||||
</span><span id="qualify_tables-64"><a href="#qualify_tables-64"><span class="linenos">64</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="n">source</span><span class="o">.</span><span class="n">is_udtf</span><span class="p">:</span>
|
||||
</span><span id="qualify_tables-65"><a href="#qualify_tables-65"><span class="linenos">65</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span>
|
||||
</span><span id="qualify_tables-66"><a href="#qualify_tables-66"><span class="linenos">66</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">udtf</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">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">next_name</span><span class="p">())</span>
|
||||
</span><span id="qualify_tables-67"><a href="#qualify_tables-67"><span class="linenos">67</span></a> <span class="n">udtf</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">table_alias</span><span class="p">)</span>
|
||||
</span><span id="qualify_tables-68"><a href="#qualify_tables-68"><span class="linenos">68</span></a>
|
||||
</span><span id="qualify_tables-69"><a href="#qualify_tables-69"><span class="linenos">69</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">name</span><span class="p">:</span>
|
||||
</span><span id="qualify_tables-70"><a href="#qualify_tables-70"><span class="linenos">70</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">next_name</span><span class="p">())</span>
|
||||
</span><span id="qualify_tables-71"><a href="#qualify_tables-71"><span class="linenos">71</span></a>
|
||||
</span><span id="qualify_tables-72"><a href="#qualify_tables-72"><span class="linenos">72</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span><span id="qualify_tables-40"><a href="#qualify_tables-40"><span class="linenos">40</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</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="qualify_tables-41"><a href="#qualify_tables-41"><span class="linenos">41</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</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">"db"</span><span class="p">):</span>
|
||||
</span><span id="qualify_tables-42"><a href="#qualify_tables-42"><span class="linenos">42</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"db"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">db</span><span class="p">))</span>
|
||||
</span><span id="qualify_tables-43"><a href="#qualify_tables-43"><span class="linenos">43</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</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">"catalog"</span><span class="p">):</span>
|
||||
</span><span id="qualify_tables-44"><a href="#qualify_tables-44"><span class="linenos">44</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"catalog"</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">catalog</span><span class="p">))</span>
|
||||
</span><span id="qualify_tables-45"><a href="#qualify_tables-45"><span class="linenos">45</span></a>
|
||||
</span><span id="qualify_tables-46"><a href="#qualify_tables-46"><span class="linenos">46</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span>
|
||||
</span><span id="qualify_tables-47"><a href="#qualify_tables-47"><span class="linenos">47</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span>
|
||||
</span><span id="qualify_tables-48"><a href="#qualify_tables-48"><span class="linenos">48</span></a> <span class="n">alias</span><span class="p">(</span>
|
||||
</span><span id="qualify_tables-49"><a href="#qualify_tables-49"><span class="linenos">49</span></a> <span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span>
|
||||
</span><span id="qualify_tables-50"><a href="#qualify_tables-50"><span class="linenos">50</span></a> <span class="n">name</span> <span class="k">if</span> <span class="n">name</span> <span class="k">else</span> <span class="n">next_name</span><span class="p">(),</span>
|
||||
</span><span id="qualify_tables-51"><a href="#qualify_tables-51"><span class="linenos">51</span></a> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
|
||||
</span><span id="qualify_tables-52"><a href="#qualify_tables-52"><span class="linenos">52</span></a> <span class="p">)</span>
|
||||
</span><span id="qualify_tables-53"><a href="#qualify_tables-53"><span class="linenos">53</span></a> <span class="p">)</span>
|
||||
</span><span id="qualify_tables-54"><a href="#qualify_tables-54"><span class="linenos">54</span></a>
|
||||
</span><span id="qualify_tables-55"><a href="#qualify_tables-55"><span class="linenos">55</span></a> <span class="k">if</span> <span class="n">schema</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">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span>
|
||||
</span><span id="qualify_tables-56"><a href="#qualify_tables-56"><span class="linenos">56</span></a> <span class="k">with</span> <span class="n">csv_reader</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">as</span> <span class="n">reader</span><span class="p">:</span>
|
||||
</span><span id="qualify_tables-57"><a href="#qualify_tables-57"><span class="linenos">57</span></a> <span class="n">header</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span>
|
||||
</span><span id="qualify_tables-58"><a href="#qualify_tables-58"><span class="linenos">58</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span>
|
||||
</span><span id="qualify_tables-59"><a href="#qualify_tables-59"><span class="linenos">59</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">add_table</span><span class="p">(</span>
|
||||
</span><span id="qualify_tables-60"><a href="#qualify_tables-60"><span class="linenos">60</span></a> <span class="n">source</span><span class="p">,</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="nb">type</span><span class="p">(</span><span class="n">v</span><span class="p">)</span><span class="o">.</span><span class="vm">__name__</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">header</span><span class="p">,</span> <span class="n">columns</span><span class="p">)}</span>
|
||||
</span><span id="qualify_tables-61"><a href="#qualify_tables-61"><span class="linenos">61</span></a> <span class="p">)</span>
|
||||
</span><span id="qualify_tables-62"><a href="#qualify_tables-62"><span class="linenos">62</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="n">source</span><span class="o">.</span><span class="n">is_udtf</span><span class="p">:</span>
|
||||
</span><span id="qualify_tables-63"><a href="#qualify_tables-63"><span class="linenos">63</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span>
|
||||
</span><span id="qualify_tables-64"><a href="#qualify_tables-64"><span class="linenos">64</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">udtf</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">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">next_name</span><span class="p">())</span>
|
||||
</span><span id="qualify_tables-65"><a href="#qualify_tables-65"><span class="linenos">65</span></a> <span class="n">udtf</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">table_alias</span><span class="p">)</span>
|
||||
</span><span id="qualify_tables-66"><a href="#qualify_tables-66"><span class="linenos">66</span></a>
|
||||
</span><span id="qualify_tables-67"><a href="#qualify_tables-67"><span class="linenos">67</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">name</span><span class="p">:</span>
|
||||
</span><span id="qualify_tables-68"><a href="#qualify_tables-68"><span class="linenos">68</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">next_name</span><span class="p">())</span>
|
||||
</span><span id="qualify_tables-69"><a href="#qualify_tables-69"><span class="linenos">69</span></a>
|
||||
</span><span id="qualify_tables-70"><a href="#qualify_tables-70"><span class="linenos">70</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
|
|
|||
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