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Merging upstream version 23.10.0.

Browse source 
Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
Daniel Baumann 2025-02-13 21:31:23 +01:00
parent 6cbc5d6f97
commit 49aa147013
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
91 changed files with 52881 additions and 50396 deletions
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@ -33,6 +33,9 @@
<li>
<a class="class" href="#PRQL">PRQL</a>
<ul class="memberlist">
<li>
<a class="variable" href="#PRQL.DPIPE_IS_STRING_CONCAT">DPIPE_IS_STRING_CONCAT</a>
</li>
<li>
<a class="class" href="#PRQL.Tokenizer">PRQL.Tokenizer</a>
<ul class="memberlist">
@ -54,6 +57,9 @@
<li>
<a class="class" href="#PRQL.Parser">PRQL.Parser</a>
<ul class="memberlist">
<li>
<a class="variable" href="#PRQL.Parser.CONJUNCTION">CONJUNCTION</a>
</li>
<li>
<a class="variable" href="#PRQL.Parser.TRANSFORM_PARSERS">TRANSFORM_PARSERS</a>
</li>
@ -161,103 +167,147 @@
</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span> <span class="nn">sqlglot.tokens</span> <span class="kn">import</span> <span class="n">TokenType</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><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a><span class="k">class</span> <span class="nc">PRQL</span><span class="p">(</span><span class="n">Dialect</span><span class="p">):</span>
</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a> <span class="k">class</span> <span class="nc">Tokenizer</span><span class="p">(</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="p">):</span>
</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a> <span class="n">IDENTIFIERS</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;`&quot;</span><span class="p">]</span>
</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a> <span class="n">QUOTES</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;&#39;&quot;</span><span class="p">,</span> <span class="s1">&#39;&quot;&#39;</span><span class="p">]</span>
</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 class="n">SINGLE_TOKENS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a> <span class="o">**</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="o">.</span><span class="n">SINGLE_TOKENS</span><span class="p">,</span>
</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a> <span class="s2">&quot;=&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">,</span>
</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a> <span class="s2">&quot;&#39;&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">QUOTE</span><span class="p">,</span>
</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a> <span class="s1">&#39;&quot;&#39;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">QUOTE</span><span class="p">,</span>
</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a> <span class="s2">&quot;`&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">IDENTIFIER</span><span class="p">,</span>
</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a> <span class="s2">&quot;#&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">COMMENT</span><span class="p">,</span>
</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a> <span class="p">}</span>
</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a>
</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a> <span class="n">KEYWORDS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a> <span class="o">**</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="o">.</span><span class="n">KEYWORDS</span><span class="p">,</span>
</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a> <span class="p">}</span>
</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a>
</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a> <span class="k">class</span> <span class="nc">Parser</span><span class="p">(</span><span class="n">parser</span><span class="o">.</span><span class="n">Parser</span><span class="p">):</span>
</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a> <span class="n">TRANSFORM_PARSERS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a> <span class="s2">&quot;DERIVE&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_selection</span><span class="p">(</span><span class="n">query</span><span class="p">),</span>
</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> <span class="s2">&quot;SELECT&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_selection</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span>
</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a><span class="k">def</span> <span class="nf">_select_all</span><span class="p">(</span><span class="n">table</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">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">]:</span>
</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">&quot;*&quot;</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">table</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> <span class="k">if</span> <span class="n">table</span> <span class="k">else</span> <span class="kc">None</span>
</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a>
</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 class="k">class</span> <span class="nc">PRQL</span><span class="p">(</span><span class="n">Dialect</span><span class="p">):</span>
</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a> <span class="n">DPIPE_IS_STRING_CONCAT</span> <span class="o">=</span> <span class="kc">False</span>
</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a>
</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a> <span class="k">class</span> <span class="nc">Tokenizer</span><span class="p">(</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="p">):</span>
</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a> <span class="n">IDENTIFIERS</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;`&quot;</span><span class="p">]</span>
</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a> <span class="n">QUOTES</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;&#39;&quot;</span><span class="p">,</span> <span class="s1">&#39;&quot;&#39;</span><span class="p">]</span>
</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a>
</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a> <span class="n">SINGLE_TOKENS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a> <span class="o">**</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="o">.</span><span class="n">SINGLE_TOKENS</span><span class="p">,</span>
</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a> <span class="s2">&quot;=&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">,</span>
</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a> <span class="s2">&quot;&#39;&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">QUOTE</span><span class="p">,</span>
</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a> <span class="s1">&#39;&quot;&#39;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">QUOTE</span><span class="p">,</span>
</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a> <span class="s2">&quot;`&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">IDENTIFIER</span><span class="p">,</span>
</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a> <span class="s2">&quot;#&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">COMMENT</span><span class="p">,</span>
</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a> <span class="p">}</span>
</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a>
</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a> <span class="n">KEYWORDS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> <span class="o">**</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="o">.</span><span class="n">KEYWORDS</span><span class="p">,</span>
</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> <span class="p">}</span>
</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a>
</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="k">def</span> <span class="nf">_parse_statement</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">()</span>
</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span> <span class="k">if</span> <span class="n">expression</span> <span class="k">else</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_query</span><span class="p">()</span>
</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="k">return</span> <span class="n">expression</span>
</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">_parse_query</span><span class="p">(</span>
</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">]:</span>
</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_from</span><span class="p">()</span>
</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a>
</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">from_</span><span class="p">:</span>
</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="k">return</span> <span class="kc">None</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="n">query</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">&quot;*&quot;</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">from_</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-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 class="k">while</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match_texts</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORM_PARSERS</span><span class="p">):</span>
</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="n">query</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORM_PARSERS</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_prev</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">upper</span><span class="p">()](</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">)</span>
</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a>
</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="k">return</span> <span class="n">query</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">def</span> <span class="nf">_parse_selection</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">,</span> <span class="n">append</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">:</span>
</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">L_BRACE</span><span class="p">):</span>
</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_csv</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">)</span>
</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="k">class</span> <span class="nc">Parser</span><span class="p">(</span><span class="n">parser</span><span class="o">.</span><span class="n">Parser</span><span class="p">):</span>
</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="n">CONJUNCTION</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="o">**</span><span class="n">parser</span><span class="o">.</span><span class="n">Parser</span><span class="o">.</span><span class="n">CONJUNCTION</span><span class="p">,</span>
</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="n">TokenType</span><span class="o">.</span><span class="n">DAMP</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">,</span>
</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="n">TokenType</span><span class="o">.</span><span class="n">DPIPE</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">,</span>
</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> <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="n">TRANSFORM_PARSERS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="s2">&quot;DERIVE&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_selection</span><span class="p">(</span><span class="n">query</span><span class="p">),</span>
</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="s2">&quot;SELECT&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_selection</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span>
</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="s2">&quot;TAKE&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_take</span><span class="p">(</span><span class="n">query</span><span class="p">),</span>
</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="s2">&quot;FILTER&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">query</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">()),</span>
</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="s2">&quot;APPEND&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">query</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">_select_all</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">()),</span> <span class="n">distinct</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><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="p">),</span>
</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="s2">&quot;REMOVE&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">query</span><span class="o">.</span><span class="n">except_</span><span class="p">(</span>
</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="n">_select_all</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">()),</span> <span class="n">distinct</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><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="s2">&quot;INTERSECT&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">query</span><span class="o">.</span><span class="n">intersect</span><span class="p">(</span>
</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="n">_select_all</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">()),</span> <span class="n">distinct</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><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 class="s2">&quot;SORT&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_order_by</span><span class="p">(</span><span class="n">query</span><span class="p">),</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><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">R_BRACE</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">query</span><span class="p">):</span>
</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">raise_error</span><span class="p">(</span><span class="s2">&quot;Expecting ]&quot;</span><span class="p">)</span>
</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="k">else</span><span class="p">:</span>
</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">()</span>
</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span><span class="n">expression</span><span class="p">]</span> <span class="k">if</span> <span class="n">expression</span> <span class="k">else</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="n">projections</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span> <span class="k">else</span> <span class="n">select</span>
</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">query</span><span class="o">.</span><span class="n">selects</span>
</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="p">}</span>
</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="k">def</span> <span class="nf">_parse_statement</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">()</span>
</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span> <span class="k">if</span> <span class="n">expression</span> <span class="k">else</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_query</span><span class="p">()</span>
</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="k">return</span> <span class="n">expression</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="k">def</span> <span class="nf">_parse_query</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">]:</span>
</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_from</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">from_</span><span class="p">:</span>
</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="k">return</span> <span class="kc">None</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="n">selects</span> <span class="o">=</span> <span class="p">[</span>
</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="n">select</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span>
</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="p">(</span><span class="n">projections</span><span class="p">[</span><span class="n">s</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">if</span> <span class="n">s</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">projections</span> <span class="k">else</span> <span class="n">s</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">s</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span>
</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="k">else</span> <span class="n">s</span><span class="p">,</span>
</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="p">)</span>
</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">selects</span>
</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="p">]</span>
</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 class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">selects</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="n">append</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-80"><a href="#L-80"><span class="linenos"> 80</span></a>
</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="k">def</span> <span class="nf">_parse_expression</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_next</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_next</span><span class="o">.</span><span class="n">token_type</span> <span class="o">==</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">:</span>
</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_id_var</span><span class="p">(</span><span class="kc">True</span><span class="p">)</span>
</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">)</span>
</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="k">return</span> <span class="bp">self</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">Alias</span><span class="p">,</span> <span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">(),</span> <span class="n">alias</span><span class="o">=</span><span class="n">alias</span><span class="p">)</span>
</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</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="k">def</span> <span class="nf">_parse_table</span><span class="p">(</span>
</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="n">schema</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="n">joins</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="n">alias_tokens</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Collection</span><span class="p">[</span><span class="n">TokenType</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="n">parse_bracket</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="n">is_db_reference</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_table_parts</span><span class="p">()</span>
</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a>
</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="k">def</span> <span class="nf">_parse_from</span><span class="p">(</span>
</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">joins</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> <span class="n">skip_from_token</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span>
</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">]:</span>
</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">skip_from_token</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">FROM</span><span class="p">):</span>
</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="k">return</span> <span class="kc">None</span>
</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a>
</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">(</span>
</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">comments</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_prev_comments</span><span class="p">,</span> <span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">(</span><span class="n">joins</span><span class="o">=</span><span class="n">joins</span><span class="p">)</span>
</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="p">)</span>
</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">&quot;*&quot;</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">from_</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-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">while</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match_texts</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORM_PARSERS</span><span class="p">):</span>
</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="n">query</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORM_PARSERS</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_prev</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">upper</span><span class="p">()](</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">)</span>
</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a>
</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="k">return</span> <span class="n">query</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">def</span> <span class="nf">_parse_selection</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">,</span> <span class="n">append</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">:</span>
</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">L_BRACE</span><span class="p">):</span>
</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_csv</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">)</span>
</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">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">R_BRACE</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">query</span><span class="p">):</span>
</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">raise_error</span><span class="p">(</span><span class="s2">&quot;Expecting }&quot;</span><span class="p">)</span>
</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="k">else</span><span class="p">:</span>
</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">()</span>
</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span><span class="n">expression</span><span class="p">]</span> <span class="k">if</span> <span class="n">expression</span> <span class="k">else</span> <span class="p">[]</span>
</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a>
</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="n">projections</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span> <span class="k">else</span> <span class="n">select</span>
</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">query</span><span class="o">.</span><span class="n">selects</span>
</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="p">}</span>
</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a>
</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span>
</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="n">select</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span>
</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="p">(</span><span class="n">projections</span><span class="p">[</span><span class="n">s</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">if</span> <span class="n">s</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">projections</span> <span class="k">else</span> <span class="n">s</span><span class="p">)</span>
</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span>
</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="k">else</span> <span class="n">s</span><span class="p">,</span>
</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="p">)</span>
</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">selects</span>
</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="p">]</span>
</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a>
</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">selects</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="n">append</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-102"><a href="#L-102"><span class="linenos">102</span></a>
</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="k">def</span> <span class="nf">_parse_take</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">]:</span>
</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="n">num</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_number</span><span class="p">()</span> <span class="c1"># TODO: TAKE for ranges a..b</span>
</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">limit</span><span class="p">(</span><span class="n">num</span><span class="p">)</span> <span class="k">if</span> <span class="n">num</span> <span class="k">else</span> <span class="kc">None</span>
</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a>
</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="k">def</span> <span class="nf">_parse_ordered</span><span class="p">(</span>
</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">parse_method</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>
</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">]:</span>
</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="n">asc</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">PLUS</span><span class="p">)</span>
</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="n">desc</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">DASH</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="n">asc</span> <span class="ow">and</span> <span class="kc">False</span><span class="p">)</span>
</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="n">term</span> <span class="o">=</span> <span class="n">term</span> <span class="o">=</span> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="n">_parse_ordered</span><span class="p">(</span><span class="n">parse_method</span><span class="o">=</span><span class="n">parse_method</span><span class="p">)</span>
</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="k">if</span> <span class="n">term</span> <span class="ow">and</span> <span class="n">desc</span><span class="p">:</span>
</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="n">term</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;desc&quot;</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="n">term</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;nulls_first&quot;</span><span class="p">,</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 class="k">return</span> <span class="n">term</span>
</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a>
</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="k">def</span> <span class="nf">_parse_order_by</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">]:</span>
</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="n">l_brace</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">L_BRACE</span><span class="p">)</span>
</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_csv</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_ordered</span><span class="p">)</span>
</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="k">if</span> <span class="n">l_brace</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">R_BRACE</span><span class="p">):</span>
</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">raise_error</span><span class="p">(</span><span class="s2">&quot;Expecting }&quot;</span><span class="p">)</span>
</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">order_by</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">,</span> <span class="n">expressions</span><span class="o">=</span><span class="n">expressions</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-124"><a href="#L-124"><span class="linenos">124</span></a>
</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="k">def</span> <span class="nf">_parse_expression</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_next</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_next</span><span class="o">.</span><span class="n">token_type</span> <span class="o">==</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">:</span>
</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_id_var</span><span class="p">(</span><span class="kc">True</span><span class="p">)</span>
</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">)</span>
</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="k">return</span> <span class="bp">self</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">Alias</span><span class="p">,</span> <span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">(),</span> <span class="n">alias</span><span class="o">=</span><span class="n">alias</span><span class="p">)</span>
</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">()</span>
</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a>
</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="k">def</span> <span class="nf">_parse_table</span><span class="p">(</span>
</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="n">schema</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="n">joins</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> <span class="n">alias_tokens</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Collection</span><span class="p">[</span><span class="n">TokenType</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="n">parse_bracket</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="n">is_db_reference</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_table_parts</span><span class="p">()</span>
</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a>
</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> <span class="k">def</span> <span class="nf">_parse_from</span><span class="p">(</span>
</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">joins</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> <span class="n">skip_from_token</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span>
</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">]:</span>
</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">skip_from_token</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">FROM</span><span class="p">):</span>
</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="k">return</span> <span class="kc">None</span>
</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a>
</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">(</span>
</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">comments</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_prev_comments</span><span class="p">,</span> <span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">(</span><span class="n">joins</span><span class="o">=</span><span class="n">joins</span><span class="p">)</span>
</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="p">)</span>
</span></pre></div>
@ -273,108 +323,162 @@
</div>
<a class="headerlink" href="#PRQL"></a>
<div class="pdoc-code codehilite"><pre><span></span><span id="PRQL-11"><a href="#PRQL-11"><span class="linenos"> 11</span></a><span class="k">class</span> <span class="nc">PRQL</span><span class="p">(</span><span class="n">Dialect</span><span class="p">):</span>
</span><span id="PRQL-12"><a href="#PRQL-12"><span class="linenos"> 12</span></a> <span class="k">class</span> <span class="nc">Tokenizer</span><span class="p">(</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="p">):</span>
</span><span id="PRQL-13"><a href="#PRQL-13"><span class="linenos"> 13</span></a> <span class="n">IDENTIFIERS</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;`&quot;</span><span class="p">]</span>
</span><span id="PRQL-14"><a href="#PRQL-14"><span class="linenos"> 14</span></a> <span class="n">QUOTES</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;&#39;&quot;</span><span class="p">,</span> <span class="s1">&#39;&quot;&#39;</span><span class="p">]</span>
</span><span id="PRQL-15"><a href="#PRQL-15"><span class="linenos"> 15</span></a>
</span><span id="PRQL-16"><a href="#PRQL-16"><span class="linenos"> 16</span></a> <span class="n">SINGLE_TOKENS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL-17"><a href="#PRQL-17"><span class="linenos"> 17</span></a> <span class="o">**</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="o">.</span><span class="n">SINGLE_TOKENS</span><span class="p">,</span>
</span><span id="PRQL-18"><a href="#PRQL-18"><span class="linenos"> 18</span></a> <span class="s2">&quot;=&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">,</span>
</span><span id="PRQL-19"><a href="#PRQL-19"><span class="linenos"> 19</span></a> <span class="s2">&quot;&#39;&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">QUOTE</span><span class="p">,</span>
</span><span id="PRQL-20"><a href="#PRQL-20"><span class="linenos"> 20</span></a> <span class="s1">&#39;&quot;&#39;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">QUOTE</span><span class="p">,</span>
</span><span id="PRQL-21"><a href="#PRQL-21"><span class="linenos"> 21</span></a> <span class="s2">&quot;`&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">IDENTIFIER</span><span class="p">,</span>
</span><span id="PRQL-22"><a href="#PRQL-22"><span class="linenos"> 22</span></a> <span class="s2">&quot;#&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">COMMENT</span><span class="p">,</span>
</span><span id="PRQL-23"><a href="#PRQL-23"><span class="linenos"> 23</span></a> <span class="p">}</span>
</span><span id="PRQL-24"><a href="#PRQL-24"><span class="linenos"> 24</span></a>
</span><span id="PRQL-25"><a href="#PRQL-25"><span class="linenos"> 25</span></a> <span class="n">KEYWORDS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL-26"><a href="#PRQL-26"><span class="linenos"> 26</span></a> <span class="o">**</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="o">.</span><span class="n">KEYWORDS</span><span class="p">,</span>
</span><span id="PRQL-27"><a href="#PRQL-27"><span class="linenos"> 27</span></a> <span class="p">}</span>
</span><span id="PRQL-28"><a href="#PRQL-28"><span class="linenos"> 28</span></a>
</span><span id="PRQL-29"><a href="#PRQL-29"><span class="linenos"> 29</span></a> <span class="k">class</span> <span class="nc">Parser</span><span class="p">(</span><span class="n">parser</span><span class="o">.</span><span class="n">Parser</span><span class="p">):</span>
</span><span id="PRQL-30"><a href="#PRQL-30"><span class="linenos"> 30</span></a> <span class="n">TRANSFORM_PARSERS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL-31"><a href="#PRQL-31"><span class="linenos"> 31</span></a> <span class="s2">&quot;DERIVE&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_selection</span><span class="p">(</span><span class="n">query</span><span class="p">),</span>
</span><span id="PRQL-32"><a href="#PRQL-32"><span class="linenos"> 32</span></a> <span class="s2">&quot;SELECT&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_selection</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span>
<div class="pdoc-code codehilite"><pre><span></span><span id="PRQL-15"><a href="#PRQL-15"><span class="linenos"> 15</span></a><span class="k">class</span> <span class="nc">PRQL</span><span class="p">(</span><span class="n">Dialect</span><span class="p">):</span>
</span><span id="PRQL-16"><a href="#PRQL-16"><span class="linenos"> 16</span></a> <span class="n">DPIPE_IS_STRING_CONCAT</span> <span class="o">=</span> <span class="kc">False</span>
</span><span id="PRQL-17"><a href="#PRQL-17"><span class="linenos"> 17</span></a>
</span><span id="PRQL-18"><a href="#PRQL-18"><span class="linenos"> 18</span></a> <span class="k">class</span> <span class="nc">Tokenizer</span><span class="p">(</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="p">):</span>
</span><span id="PRQL-19"><a href="#PRQL-19"><span class="linenos"> 19</span></a> <span class="n">IDENTIFIERS</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;`&quot;</span><span class="p">]</span>
</span><span id="PRQL-20"><a href="#PRQL-20"><span class="linenos"> 20</span></a> <span class="n">QUOTES</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;&#39;&quot;</span><span class="p">,</span> <span class="s1">&#39;&quot;&#39;</span><span class="p">]</span>
</span><span id="PRQL-21"><a href="#PRQL-21"><span class="linenos"> 21</span></a>
</span><span id="PRQL-22"><a href="#PRQL-22"><span class="linenos"> 22</span></a> <span class="n">SINGLE_TOKENS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL-23"><a href="#PRQL-23"><span class="linenos"> 23</span></a> <span class="o">**</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="o">.</span><span class="n">SINGLE_TOKENS</span><span class="p">,</span>
</span><span id="PRQL-24"><a href="#PRQL-24"><span class="linenos"> 24</span></a> <span class="s2">&quot;=&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">,</span>
</span><span id="PRQL-25"><a href="#PRQL-25"><span class="linenos"> 25</span></a> <span class="s2">&quot;&#39;&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">QUOTE</span><span class="p">,</span>
</span><span id="PRQL-26"><a href="#PRQL-26"><span class="linenos"> 26</span></a> <span class="s1">&#39;&quot;&#39;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">QUOTE</span><span class="p">,</span>
</span><span id="PRQL-27"><a href="#PRQL-27"><span class="linenos"> 27</span></a> <span class="s2">&quot;`&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">IDENTIFIER</span><span class="p">,</span>
</span><span id="PRQL-28"><a href="#PRQL-28"><span class="linenos"> 28</span></a> <span class="s2">&quot;#&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">COMMENT</span><span class="p">,</span>
</span><span id="PRQL-29"><a href="#PRQL-29"><span class="linenos"> 29</span></a> <span class="p">}</span>
</span><span id="PRQL-30"><a href="#PRQL-30"><span class="linenos"> 30</span></a>
</span><span id="PRQL-31"><a href="#PRQL-31"><span class="linenos"> 31</span></a> <span class="n">KEYWORDS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL-32"><a href="#PRQL-32"><span class="linenos"> 32</span></a> <span class="o">**</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="o">.</span><span class="n">KEYWORDS</span><span class="p">,</span>
</span><span id="PRQL-33"><a href="#PRQL-33"><span class="linenos"> 33</span></a> <span class="p">}</span>
</span><span id="PRQL-34"><a href="#PRQL-34"><span class="linenos"> 34</span></a>
</span><span id="PRQL-35"><a href="#PRQL-35"><span class="linenos"> 35</span></a> <span class="k">def</span> <span class="nf">_parse_statement</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="PRQL-36"><a href="#PRQL-36"><span class="linenos"> 36</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">()</span>
</span><span id="PRQL-37"><a href="#PRQL-37"><span class="linenos"> 37</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span> <span class="k">if</span> <span class="n">expression</span> <span class="k">else</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_query</span><span class="p">()</span>
</span><span id="PRQL-38"><a href="#PRQL-38"><span class="linenos"> 38</span></a> <span class="k">return</span> <span class="n">expression</span>
</span><span id="PRQL-39"><a href="#PRQL-39"><span class="linenos"> 39</span></a>
</span><span id="PRQL-40"><a href="#PRQL-40"><span class="linenos"> 40</span></a> <span class="k">def</span> <span class="nf">_parse_query</span><span class="p">(</span>
</span><span id="PRQL-41"><a href="#PRQL-41"><span class="linenos"> 41</span></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="PRQL-42"><a href="#PRQL-42"><span class="linenos"> 42</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">]:</span>
</span><span id="PRQL-43"><a href="#PRQL-43"><span class="linenos"> 43</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_from</span><span class="p">()</span>
</span><span id="PRQL-44"><a href="#PRQL-44"><span class="linenos"> 44</span></a>
</span><span id="PRQL-45"><a href="#PRQL-45"><span class="linenos"> 45</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">from_</span><span class="p">:</span>
</span><span id="PRQL-46"><a href="#PRQL-46"><span class="linenos"> 46</span></a> <span class="k">return</span> <span class="kc">None</span>
</span><span id="PRQL-47"><a href="#PRQL-47"><span class="linenos"> 47</span></a>
</span><span id="PRQL-48"><a href="#PRQL-48"><span class="linenos"> 48</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">&quot;*&quot;</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">from_</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="PRQL-49"><a href="#PRQL-49"><span class="linenos"> 49</span></a>
</span><span id="PRQL-50"><a href="#PRQL-50"><span class="linenos"> 50</span></a> <span class="k">while</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match_texts</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORM_PARSERS</span><span class="p">):</span>
</span><span id="PRQL-51"><a href="#PRQL-51"><span class="linenos"> 51</span></a> <span class="n">query</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORM_PARSERS</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_prev</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">upper</span><span class="p">()](</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">)</span>
</span><span id="PRQL-52"><a href="#PRQL-52"><span class="linenos"> 52</span></a>
</span><span id="PRQL-53"><a href="#PRQL-53"><span class="linenos"> 53</span></a> <span class="k">return</span> <span class="n">query</span>
</span><span id="PRQL-54"><a href="#PRQL-54"><span class="linenos"> 54</span></a>
</span><span id="PRQL-55"><a href="#PRQL-55"><span class="linenos"> 55</span></a> <span class="k">def</span> <span class="nf">_parse_selection</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">,</span> <span class="n">append</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">:</span>
</span><span id="PRQL-56"><a href="#PRQL-56"><span class="linenos"> 56</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">L_BRACE</span><span class="p">):</span>
</span><span id="PRQL-57"><a href="#PRQL-57"><span class="linenos"> 57</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_csv</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">)</span>
</span><span id="PRQL-35"><a href="#PRQL-35"><span class="linenos"> 35</span></a> <span class="k">class</span> <span class="nc">Parser</span><span class="p">(</span><span class="n">parser</span><span class="o">.</span><span class="n">Parser</span><span class="p">):</span>
</span><span id="PRQL-36"><a href="#PRQL-36"><span class="linenos"> 36</span></a> <span class="n">CONJUNCTION</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL-37"><a href="#PRQL-37"><span class="linenos"> 37</span></a> <span class="o">**</span><span class="n">parser</span><span class="o">.</span><span class="n">Parser</span><span class="o">.</span><span class="n">CONJUNCTION</span><span class="p">,</span>
</span><span id="PRQL-38"><a href="#PRQL-38"><span class="linenos"> 38</span></a> <span class="n">TokenType</span><span class="o">.</span><span class="n">DAMP</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">,</span>
</span><span id="PRQL-39"><a href="#PRQL-39"><span class="linenos"> 39</span></a> <span class="n">TokenType</span><span class="o">.</span><span class="n">DPIPE</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">,</span>
</span><span id="PRQL-40"><a href="#PRQL-40"><span class="linenos"> 40</span></a> <span class="p">}</span>
</span><span id="PRQL-41"><a href="#PRQL-41"><span class="linenos"> 41</span></a>
</span><span id="PRQL-42"><a href="#PRQL-42"><span class="linenos"> 42</span></a> <span class="n">TRANSFORM_PARSERS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL-43"><a href="#PRQL-43"><span class="linenos"> 43</span></a> <span class="s2">&quot;DERIVE&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_selection</span><span class="p">(</span><span class="n">query</span><span class="p">),</span>
</span><span id="PRQL-44"><a href="#PRQL-44"><span class="linenos"> 44</span></a> <span class="s2">&quot;SELECT&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_selection</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span>
</span><span id="PRQL-45"><a href="#PRQL-45"><span class="linenos"> 45</span></a> <span class="s2">&quot;TAKE&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_take</span><span class="p">(</span><span class="n">query</span><span class="p">),</span>
</span><span id="PRQL-46"><a href="#PRQL-46"><span class="linenos"> 46</span></a> <span class="s2">&quot;FILTER&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">query</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">()),</span>
</span><span id="PRQL-47"><a href="#PRQL-47"><span class="linenos"> 47</span></a> <span class="s2">&quot;APPEND&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">query</span><span class="o">.</span><span class="n">union</span><span class="p">(</span>
</span><span id="PRQL-48"><a href="#PRQL-48"><span class="linenos"> 48</span></a> <span class="n">_select_all</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">()),</span> <span class="n">distinct</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><span id="PRQL-49"><a href="#PRQL-49"><span class="linenos"> 49</span></a> <span class="p">),</span>
</span><span id="PRQL-50"><a href="#PRQL-50"><span class="linenos"> 50</span></a> <span class="s2">&quot;REMOVE&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">query</span><span class="o">.</span><span class="n">except_</span><span class="p">(</span>
</span><span id="PRQL-51"><a href="#PRQL-51"><span class="linenos"> 51</span></a> <span class="n">_select_all</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">()),</span> <span class="n">distinct</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><span id="PRQL-52"><a href="#PRQL-52"><span class="linenos"> 52</span></a> <span class="p">),</span>
</span><span id="PRQL-53"><a href="#PRQL-53"><span class="linenos"> 53</span></a> <span class="s2">&quot;INTERSECT&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">query</span><span class="o">.</span><span class="n">intersect</span><span class="p">(</span>
</span><span id="PRQL-54"><a href="#PRQL-54"><span class="linenos"> 54</span></a> <span class="n">_select_all</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">()),</span> <span class="n">distinct</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><span id="PRQL-55"><a href="#PRQL-55"><span class="linenos"> 55</span></a> <span class="p">),</span>
</span><span id="PRQL-56"><a href="#PRQL-56"><span class="linenos"> 56</span></a> <span class="s2">&quot;SORT&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_order_by</span><span class="p">(</span><span class="n">query</span><span class="p">),</span>
</span><span id="PRQL-57"><a href="#PRQL-57"><span class="linenos"> 57</span></a> <span class="p">}</span>
</span><span id="PRQL-58"><a href="#PRQL-58"><span class="linenos"> 58</span></a>
</span><span id="PRQL-59"><a href="#PRQL-59"><span class="linenos"> 59</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">R_BRACE</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">query</span><span class="p">):</span>
</span><span id="PRQL-60"><a href="#PRQL-60"><span class="linenos"> 60</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">raise_error</span><span class="p">(</span><span class="s2">&quot;Expecting ]&quot;</span><span class="p">)</span>
</span><span id="PRQL-61"><a href="#PRQL-61"><span class="linenos"> 61</span></a> <span class="k">else</span><span class="p">:</span>
</span><span id="PRQL-62"><a href="#PRQL-62"><span class="linenos"> 62</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">()</span>
</span><span id="PRQL-63"><a href="#PRQL-63"><span class="linenos"> 63</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span><span class="n">expression</span><span class="p">]</span> <span class="k">if</span> <span class="n">expression</span> <span class="k">else</span> <span class="p">[]</span>
</span><span id="PRQL-64"><a href="#PRQL-64"><span class="linenos"> 64</span></a>
</span><span id="PRQL-65"><a href="#PRQL-65"><span class="linenos"> 65</span></a> <span class="n">projections</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL-66"><a href="#PRQL-66"><span class="linenos"> 66</span></a> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span> <span class="k">else</span> <span class="n">select</span>
</span><span id="PRQL-67"><a href="#PRQL-67"><span class="linenos"> 67</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">query</span><span class="o">.</span><span class="n">selects</span>
</span><span id="PRQL-68"><a href="#PRQL-68"><span class="linenos"> 68</span></a> <span class="p">}</span>
</span><span id="PRQL-59"><a href="#PRQL-59"><span class="linenos"> 59</span></a> <span class="k">def</span> <span class="nf">_parse_statement</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="PRQL-60"><a href="#PRQL-60"><span class="linenos"> 60</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">()</span>
</span><span id="PRQL-61"><a href="#PRQL-61"><span class="linenos"> 61</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span> <span class="k">if</span> <span class="n">expression</span> <span class="k">else</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_query</span><span class="p">()</span>
</span><span id="PRQL-62"><a href="#PRQL-62"><span class="linenos"> 62</span></a> <span class="k">return</span> <span class="n">expression</span>
</span><span id="PRQL-63"><a href="#PRQL-63"><span class="linenos"> 63</span></a>
</span><span id="PRQL-64"><a href="#PRQL-64"><span class="linenos"> 64</span></a> <span class="k">def</span> <span class="nf">_parse_query</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">]:</span>
</span><span id="PRQL-65"><a href="#PRQL-65"><span class="linenos"> 65</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_from</span><span class="p">()</span>
</span><span id="PRQL-66"><a href="#PRQL-66"><span class="linenos"> 66</span></a>
</span><span id="PRQL-67"><a href="#PRQL-67"><span class="linenos"> 67</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">from_</span><span class="p">:</span>
</span><span id="PRQL-68"><a href="#PRQL-68"><span class="linenos"> 68</span></a> <span class="k">return</span> <span class="kc">None</span>
</span><span id="PRQL-69"><a href="#PRQL-69"><span class="linenos"> 69</span></a>
</span><span id="PRQL-70"><a href="#PRQL-70"><span class="linenos"> 70</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span>
</span><span id="PRQL-71"><a href="#PRQL-71"><span class="linenos"> 71</span></a> <span class="n">select</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span>
</span><span id="PRQL-72"><a href="#PRQL-72"><span class="linenos"> 72</span></a> <span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="p">(</span><span class="n">projections</span><span class="p">[</span><span class="n">s</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">if</span> <span class="n">s</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">projections</span> <span class="k">else</span> <span class="n">s</span><span class="p">)</span>
</span><span id="PRQL-73"><a href="#PRQL-73"><span class="linenos"> 73</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span>
</span><span id="PRQL-74"><a href="#PRQL-74"><span class="linenos"> 74</span></a> <span class="k">else</span> <span class="n">s</span><span class="p">,</span>
</span><span id="PRQL-75"><a href="#PRQL-75"><span class="linenos"> 75</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL-76"><a href="#PRQL-76"><span class="linenos"> 76</span></a> <span class="p">)</span>
</span><span id="PRQL-77"><a href="#PRQL-77"><span class="linenos"> 77</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">selects</span>
</span><span id="PRQL-78"><a href="#PRQL-78"><span class="linenos"> 78</span></a> <span class="p">]</span>
</span><span id="PRQL-79"><a href="#PRQL-79"><span class="linenos"> 79</span></a>
</span><span id="PRQL-80"><a href="#PRQL-80"><span class="linenos"> 80</span></a> <span class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">selects</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="n">append</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="PRQL-81"><a href="#PRQL-81"><span class="linenos"> 81</span></a>
</span><span id="PRQL-82"><a href="#PRQL-82"><span class="linenos"> 82</span></a> <span class="k">def</span> <span class="nf">_parse_expression</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="PRQL-83"><a href="#PRQL-83"><span class="linenos"> 83</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_next</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_next</span><span class="o">.</span><span class="n">token_type</span> <span class="o">==</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">:</span>
</span><span id="PRQL-84"><a href="#PRQL-84"><span class="linenos"> 84</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_id_var</span><span class="p">(</span><span class="kc">True</span><span class="p">)</span>
</span><span id="PRQL-85"><a href="#PRQL-85"><span class="linenos"> 85</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">)</span>
</span><span id="PRQL-86"><a href="#PRQL-86"><span class="linenos"> 86</span></a> <span class="k">return</span> <span class="bp">self</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">Alias</span><span class="p">,</span> <span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">(),</span> <span class="n">alias</span><span class="o">=</span><span class="n">alias</span><span class="p">)</span>
</span><span id="PRQL-87"><a href="#PRQL-87"><span class="linenos"> 87</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">()</span>
</span><span id="PRQL-88"><a href="#PRQL-88"><span class="linenos"> 88</span></a>
</span><span id="PRQL-89"><a href="#PRQL-89"><span class="linenos"> 89</span></a> <span class="k">def</span> <span class="nf">_parse_table</span><span class="p">(</span>
</span><span id="PRQL-90"><a href="#PRQL-90"><span class="linenos"> 90</span></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="PRQL-91"><a href="#PRQL-91"><span class="linenos"> 91</span></a> <span class="n">schema</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL-92"><a href="#PRQL-92"><span class="linenos"> 92</span></a> <span class="n">joins</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL-93"><a href="#PRQL-93"><span class="linenos"> 93</span></a> <span class="n">alias_tokens</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Collection</span><span class="p">[</span><span class="n">TokenType</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="PRQL-94"><a href="#PRQL-94"><span class="linenos"> 94</span></a> <span class="n">parse_bracket</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL-95"><a href="#PRQL-95"><span class="linenos"> 95</span></a> <span class="n">is_db_reference</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL-96"><a href="#PRQL-96"><span class="linenos"> 96</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="PRQL-97"><a href="#PRQL-97"><span class="linenos"> 97</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_table_parts</span><span class="p">()</span>
</span><span id="PRQL-98"><a href="#PRQL-98"><span class="linenos"> 98</span></a>
</span><span id="PRQL-99"><a href="#PRQL-99"><span class="linenos"> 99</span></a> <span class="k">def</span> <span class="nf">_parse_from</span><span class="p">(</span>
</span><span id="PRQL-100"><a href="#PRQL-100"><span class="linenos">100</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">joins</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> <span class="n">skip_from_token</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span>
</span><span id="PRQL-101"><a href="#PRQL-101"><span class="linenos">101</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">]:</span>
</span><span id="PRQL-102"><a href="#PRQL-102"><span class="linenos">102</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">skip_from_token</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">FROM</span><span class="p">):</span>
</span><span id="PRQL-103"><a href="#PRQL-103"><span class="linenos">103</span></a> <span class="k">return</span> <span class="kc">None</span>
</span><span id="PRQL-104"><a href="#PRQL-104"><span class="linenos">104</span></a>
</span><span id="PRQL-105"><a href="#PRQL-105"><span class="linenos">105</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">(</span>
</span><span id="PRQL-106"><a href="#PRQL-106"><span class="linenos">106</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">comments</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_prev_comments</span><span class="p">,</span> <span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">(</span><span class="n">joins</span><span class="o">=</span><span class="n">joins</span><span class="p">)</span>
</span><span id="PRQL-107"><a href="#PRQL-107"><span class="linenos">107</span></a> <span class="p">)</span>
</span><span id="PRQL-70"><a href="#PRQL-70"><span class="linenos"> 70</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">&quot;*&quot;</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">from_</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="PRQL-71"><a href="#PRQL-71"><span class="linenos"> 71</span></a>
</span><span id="PRQL-72"><a href="#PRQL-72"><span class="linenos"> 72</span></a> <span class="k">while</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match_texts</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORM_PARSERS</span><span class="p">):</span>
</span><span id="PRQL-73"><a href="#PRQL-73"><span class="linenos"> 73</span></a> <span class="n">query</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORM_PARSERS</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_prev</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">upper</span><span class="p">()](</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">)</span>
</span><span id="PRQL-74"><a href="#PRQL-74"><span class="linenos"> 74</span></a>
</span><span id="PRQL-75"><a href="#PRQL-75"><span class="linenos"> 75</span></a> <span class="k">return</span> <span class="n">query</span>
</span><span id="PRQL-76"><a href="#PRQL-76"><span class="linenos"> 76</span></a>
</span><span id="PRQL-77"><a href="#PRQL-77"><span class="linenos"> 77</span></a> <span class="k">def</span> <span class="nf">_parse_selection</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">,</span> <span class="n">append</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">:</span>
</span><span id="PRQL-78"><a href="#PRQL-78"><span class="linenos"> 78</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">L_BRACE</span><span class="p">):</span>
</span><span id="PRQL-79"><a href="#PRQL-79"><span class="linenos"> 79</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_csv</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">)</span>
</span><span id="PRQL-80"><a href="#PRQL-80"><span class="linenos"> 80</span></a>
</span><span id="PRQL-81"><a href="#PRQL-81"><span class="linenos"> 81</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">R_BRACE</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">query</span><span class="p">):</span>
</span><span id="PRQL-82"><a href="#PRQL-82"><span class="linenos"> 82</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">raise_error</span><span class="p">(</span><span class="s2">&quot;Expecting }&quot;</span><span class="p">)</span>
</span><span id="PRQL-83"><a href="#PRQL-83"><span class="linenos"> 83</span></a> <span class="k">else</span><span class="p">:</span>
</span><span id="PRQL-84"><a href="#PRQL-84"><span class="linenos"> 84</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">()</span>
</span><span id="PRQL-85"><a href="#PRQL-85"><span class="linenos"> 85</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span><span class="n">expression</span><span class="p">]</span> <span class="k">if</span> <span class="n">expression</span> <span class="k">else</span> <span class="p">[]</span>
</span><span id="PRQL-86"><a href="#PRQL-86"><span class="linenos"> 86</span></a>
</span><span id="PRQL-87"><a href="#PRQL-87"><span class="linenos"> 87</span></a> <span class="n">projections</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL-88"><a href="#PRQL-88"><span class="linenos"> 88</span></a> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span> <span class="k">else</span> <span class="n">select</span>
</span><span id="PRQL-89"><a href="#PRQL-89"><span class="linenos"> 89</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">query</span><span class="o">.</span><span class="n">selects</span>
</span><span id="PRQL-90"><a href="#PRQL-90"><span class="linenos"> 90</span></a> <span class="p">}</span>
</span><span id="PRQL-91"><a href="#PRQL-91"><span class="linenos"> 91</span></a>
</span><span id="PRQL-92"><a href="#PRQL-92"><span class="linenos"> 92</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span>
</span><span id="PRQL-93"><a href="#PRQL-93"><span class="linenos"> 93</span></a> <span class="n">select</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span>
</span><span id="PRQL-94"><a href="#PRQL-94"><span class="linenos"> 94</span></a> <span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="p">(</span><span class="n">projections</span><span class="p">[</span><span class="n">s</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">if</span> <span class="n">s</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">projections</span> <span class="k">else</span> <span class="n">s</span><span class="p">)</span>
</span><span id="PRQL-95"><a href="#PRQL-95"><span class="linenos"> 95</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span>
</span><span id="PRQL-96"><a href="#PRQL-96"><span class="linenos"> 96</span></a> <span class="k">else</span> <span class="n">s</span><span class="p">,</span>
</span><span id="PRQL-97"><a href="#PRQL-97"><span class="linenos"> 97</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL-98"><a href="#PRQL-98"><span class="linenos"> 98</span></a> <span class="p">)</span>
</span><span id="PRQL-99"><a href="#PRQL-99"><span class="linenos"> 99</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">selects</span>
</span><span id="PRQL-100"><a href="#PRQL-100"><span class="linenos">100</span></a> <span class="p">]</span>
</span><span id="PRQL-101"><a href="#PRQL-101"><span class="linenos">101</span></a>
</span><span id="PRQL-102"><a href="#PRQL-102"><span class="linenos">102</span></a> <span class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">selects</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="n">append</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="PRQL-103"><a href="#PRQL-103"><span class="linenos">103</span></a>
</span><span id="PRQL-104"><a href="#PRQL-104"><span class="linenos">104</span></a> <span class="k">def</span> <span class="nf">_parse_take</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">]:</span>
</span><span id="PRQL-105"><a href="#PRQL-105"><span class="linenos">105</span></a> <span class="n">num</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_number</span><span class="p">()</span> <span class="c1"># TODO: TAKE for ranges a..b</span>
</span><span id="PRQL-106"><a href="#PRQL-106"><span class="linenos">106</span></a> <span class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">limit</span><span class="p">(</span><span class="n">num</span><span class="p">)</span> <span class="k">if</span> <span class="n">num</span> <span class="k">else</span> <span class="kc">None</span>
</span><span id="PRQL-107"><a href="#PRQL-107"><span class="linenos">107</span></a>
</span><span id="PRQL-108"><a href="#PRQL-108"><span class="linenos">108</span></a> <span class="k">def</span> <span class="nf">_parse_ordered</span><span class="p">(</span>
</span><span id="PRQL-109"><a href="#PRQL-109"><span class="linenos">109</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">parse_method</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>
</span><span id="PRQL-110"><a href="#PRQL-110"><span class="linenos">110</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">]:</span>
</span><span id="PRQL-111"><a href="#PRQL-111"><span class="linenos">111</span></a> <span class="n">asc</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">PLUS</span><span class="p">)</span>
</span><span id="PRQL-112"><a href="#PRQL-112"><span class="linenos">112</span></a> <span class="n">desc</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">DASH</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="n">asc</span> <span class="ow">and</span> <span class="kc">False</span><span class="p">)</span>
</span><span id="PRQL-113"><a href="#PRQL-113"><span class="linenos">113</span></a> <span class="n">term</span> <span class="o">=</span> <span class="n">term</span> <span class="o">=</span> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="n">_parse_ordered</span><span class="p">(</span><span class="n">parse_method</span><span class="o">=</span><span class="n">parse_method</span><span class="p">)</span>
</span><span id="PRQL-114"><a href="#PRQL-114"><span class="linenos">114</span></a> <span class="k">if</span> <span class="n">term</span> <span class="ow">and</span> <span class="n">desc</span><span class="p">:</span>
</span><span id="PRQL-115"><a href="#PRQL-115"><span class="linenos">115</span></a> <span class="n">term</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;desc&quot;</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
</span><span id="PRQL-116"><a href="#PRQL-116"><span class="linenos">116</span></a> <span class="n">term</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;nulls_first&quot;</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span>
</span><span id="PRQL-117"><a href="#PRQL-117"><span class="linenos">117</span></a> <span class="k">return</span> <span class="n">term</span>
</span><span id="PRQL-118"><a href="#PRQL-118"><span class="linenos">118</span></a>
</span><span id="PRQL-119"><a href="#PRQL-119"><span class="linenos">119</span></a> <span class="k">def</span> <span class="nf">_parse_order_by</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">]:</span>
</span><span id="PRQL-120"><a href="#PRQL-120"><span class="linenos">120</span></a> <span class="n">l_brace</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">L_BRACE</span><span class="p">)</span>
</span><span id="PRQL-121"><a href="#PRQL-121"><span class="linenos">121</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_csv</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_ordered</span><span class="p">)</span>
</span><span id="PRQL-122"><a href="#PRQL-122"><span class="linenos">122</span></a> <span class="k">if</span> <span class="n">l_brace</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">R_BRACE</span><span class="p">):</span>
</span><span id="PRQL-123"><a href="#PRQL-123"><span class="linenos">123</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">raise_error</span><span class="p">(</span><span class="s2">&quot;Expecting }&quot;</span><span class="p">)</span>
</span><span id="PRQL-124"><a href="#PRQL-124"><span class="linenos">124</span></a> <span class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">order_by</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">,</span> <span class="n">expressions</span><span class="o">=</span><span class="n">expressions</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="PRQL-125"><a href="#PRQL-125"><span class="linenos">125</span></a>
</span><span id="PRQL-126"><a href="#PRQL-126"><span class="linenos">126</span></a> <span class="k">def</span> <span class="nf">_parse_expression</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="PRQL-127"><a href="#PRQL-127"><span class="linenos">127</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_next</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_next</span><span class="o">.</span><span class="n">token_type</span> <span class="o">==</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">:</span>
</span><span id="PRQL-128"><a href="#PRQL-128"><span class="linenos">128</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_id_var</span><span class="p">(</span><span class="kc">True</span><span class="p">)</span>
</span><span id="PRQL-129"><a href="#PRQL-129"><span class="linenos">129</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">)</span>
</span><span id="PRQL-130"><a href="#PRQL-130"><span class="linenos">130</span></a> <span class="k">return</span> <span class="bp">self</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">Alias</span><span class="p">,</span> <span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">(),</span> <span class="n">alias</span><span class="o">=</span><span class="n">alias</span><span class="p">)</span>
</span><span id="PRQL-131"><a href="#PRQL-131"><span class="linenos">131</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">()</span>
</span><span id="PRQL-132"><a href="#PRQL-132"><span class="linenos">132</span></a>
</span><span id="PRQL-133"><a href="#PRQL-133"><span class="linenos">133</span></a> <span class="k">def</span> <span class="nf">_parse_table</span><span class="p">(</span>
</span><span id="PRQL-134"><a href="#PRQL-134"><span class="linenos">134</span></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="PRQL-135"><a href="#PRQL-135"><span class="linenos">135</span></a> <span class="n">schema</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL-136"><a href="#PRQL-136"><span class="linenos">136</span></a> <span class="n">joins</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL-137"><a href="#PRQL-137"><span class="linenos">137</span></a> <span class="n">alias_tokens</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Collection</span><span class="p">[</span><span class="n">TokenType</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="PRQL-138"><a href="#PRQL-138"><span class="linenos">138</span></a> <span class="n">parse_bracket</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL-139"><a href="#PRQL-139"><span class="linenos">139</span></a> <span class="n">is_db_reference</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL-140"><a href="#PRQL-140"><span class="linenos">140</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="PRQL-141"><a href="#PRQL-141"><span class="linenos">141</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_table_parts</span><span class="p">()</span>
</span><span id="PRQL-142"><a href="#PRQL-142"><span class="linenos">142</span></a>
</span><span id="PRQL-143"><a href="#PRQL-143"><span class="linenos">143</span></a> <span class="k">def</span> <span class="nf">_parse_from</span><span class="p">(</span>
</span><span id="PRQL-144"><a href="#PRQL-144"><span class="linenos">144</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">joins</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> <span class="n">skip_from_token</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span>
</span><span id="PRQL-145"><a href="#PRQL-145"><span class="linenos">145</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">]:</span>
</span><span id="PRQL-146"><a href="#PRQL-146"><span class="linenos">146</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">skip_from_token</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">FROM</span><span class="p">):</span>
</span><span id="PRQL-147"><a href="#PRQL-147"><span class="linenos">147</span></a> <span class="k">return</span> <span class="kc">None</span>
</span><span id="PRQL-148"><a href="#PRQL-148"><span class="linenos">148</span></a>
</span><span id="PRQL-149"><a href="#PRQL-149"><span class="linenos">149</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">(</span>
</span><span id="PRQL-150"><a href="#PRQL-150"><span class="linenos">150</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">comments</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_prev_comments</span><span class="p">,</span> <span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">(</span><span class="n">joins</span><span class="o">=</span><span class="n">joins</span><span class="p">)</span>
</span><span id="PRQL-151"><a href="#PRQL-151"><span class="linenos">151</span></a> <span class="p">)</span>
</span></pre></div>
<div id="PRQL.DPIPE_IS_STRING_CONCAT" class="classattr">
<div class="attr variable">
<span class="name">DPIPE_IS_STRING_CONCAT</span> =
<span class="default_value">False</span>
</div>
<a class="headerlink" href="#PRQL.DPIPE_IS_STRING_CONCAT"></a>
<div class="docstring"><p>Whether the DPIPE token (<code>||</code>) is a string concatenation operator.</p>
</div>
</div>
<div id="PRQL.tokenizer_class" class="classattr">
<div class="attr variable">
<span class="name">tokenizer_class</span> =
@ -627,7 +731,6 @@
<dd id="PRQL.TABLESAMPLE_SIZE_IS_PERCENT" class="variable"><a href="dialect.html#Dialect.TABLESAMPLE_SIZE_IS_PERCENT">TABLESAMPLE_SIZE_IS_PERCENT</a></dd>
<dd id="PRQL.NORMALIZATION_STRATEGY" class="variable"><a href="dialect.html#Dialect.NORMALIZATION_STRATEGY">NORMALIZATION_STRATEGY</a></dd>
<dd id="PRQL.IDENTIFIERS_CAN_START_WITH_DIGIT" class="variable"><a href="dialect.html#Dialect.IDENTIFIERS_CAN_START_WITH_DIGIT">IDENTIFIERS_CAN_START_WITH_DIGIT</a></dd>
<dd id="PRQL.DPIPE_IS_STRING_CONCAT" class="variable"><a href="dialect.html#Dialect.DPIPE_IS_STRING_CONCAT">DPIPE_IS_STRING_CONCAT</a></dd>
<dd id="PRQL.STRICT_STRING_CONCAT" class="variable"><a href="dialect.html#Dialect.STRICT_STRING_CONCAT">STRICT_STRING_CONCAT</a></dd>
<dd id="PRQL.SUPPORTS_USER_DEFINED_TYPES" class="variable"><a href="dialect.html#Dialect.SUPPORTS_USER_DEFINED_TYPES">SUPPORTS_USER_DEFINED_TYPES</a></dd>
<dd id="PRQL.SUPPORTS_SEMI_ANTI_JOIN" class="variable"><a href="dialect.html#Dialect.SUPPORTS_SEMI_ANTI_JOIN">SUPPORTS_SEMI_ANTI_JOIN</a></dd>
@ -676,22 +779,22 @@
</div>
<a class="headerlink" href="#PRQL.Tokenizer"></a>
<div class="pdoc-code codehilite"><pre><span></span><span id="PRQL.Tokenizer-12"><a href="#PRQL.Tokenizer-12"><span class="linenos">12</span></a> <span class="k">class</span> <span class="nc">Tokenizer</span><span class="p">(</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="p">):</span>
</span><span id="PRQL.Tokenizer-13"><a href="#PRQL.Tokenizer-13"><span class="linenos">13</span></a> <span class="n">IDENTIFIERS</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;`&quot;</span><span class="p">]</span>
</span><span id="PRQL.Tokenizer-14"><a href="#PRQL.Tokenizer-14"><span class="linenos">14</span></a> <span class="n">QUOTES</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;&#39;&quot;</span><span class="p">,</span> <span class="s1">&#39;&quot;&#39;</span><span class="p">]</span>
</span><span id="PRQL.Tokenizer-15"><a href="#PRQL.Tokenizer-15"><span class="linenos">15</span></a>
</span><span id="PRQL.Tokenizer-16"><a href="#PRQL.Tokenizer-16"><span class="linenos">16</span></a> <span class="n">SINGLE_TOKENS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL.Tokenizer-17"><a href="#PRQL.Tokenizer-17"><span class="linenos">17</span></a> <span class="o">**</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="o">.</span><span class="n">SINGLE_TOKENS</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-18"><a href="#PRQL.Tokenizer-18"><span class="linenos">18</span></a> <span class="s2">&quot;=&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-19"><a href="#PRQL.Tokenizer-19"><span class="linenos">19</span></a> <span class="s2">&quot;&#39;&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">QUOTE</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-20"><a href="#PRQL.Tokenizer-20"><span class="linenos">20</span></a> <span class="s1">&#39;&quot;&#39;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">QUOTE</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-21"><a href="#PRQL.Tokenizer-21"><span class="linenos">21</span></a> <span class="s2">&quot;`&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">IDENTIFIER</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-22"><a href="#PRQL.Tokenizer-22"><span class="linenos">22</span></a> <span class="s2">&quot;#&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">COMMENT</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-23"><a href="#PRQL.Tokenizer-23"><span class="linenos">23</span></a> <span class="p">}</span>
</span><span id="PRQL.Tokenizer-24"><a href="#PRQL.Tokenizer-24"><span class="linenos">24</span></a>
</span><span id="PRQL.Tokenizer-25"><a href="#PRQL.Tokenizer-25"><span class="linenos">25</span></a> <span class="n">KEYWORDS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL.Tokenizer-26"><a href="#PRQL.Tokenizer-26"><span class="linenos">26</span></a> <span class="o">**</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="o">.</span><span class="n">KEYWORDS</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-27"><a href="#PRQL.Tokenizer-27"><span class="linenos">27</span></a> <span class="p">}</span>
<div class="pdoc-code codehilite"><pre><span></span><span id="PRQL.Tokenizer-18"><a href="#PRQL.Tokenizer-18"><span class="linenos">18</span></a> <span class="k">class</span> <span class="nc">Tokenizer</span><span class="p">(</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="p">):</span>
</span><span id="PRQL.Tokenizer-19"><a href="#PRQL.Tokenizer-19"><span class="linenos">19</span></a> <span class="n">IDENTIFIERS</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;`&quot;</span><span class="p">]</span>
</span><span id="PRQL.Tokenizer-20"><a href="#PRQL.Tokenizer-20"><span class="linenos">20</span></a> <span class="n">QUOTES</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;&#39;&quot;</span><span class="p">,</span> <span class="s1">&#39;&quot;&#39;</span><span class="p">]</span>
</span><span id="PRQL.Tokenizer-21"><a href="#PRQL.Tokenizer-21"><span class="linenos">21</span></a>
</span><span id="PRQL.Tokenizer-22"><a href="#PRQL.Tokenizer-22"><span class="linenos">22</span></a> <span class="n">SINGLE_TOKENS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL.Tokenizer-23"><a href="#PRQL.Tokenizer-23"><span class="linenos">23</span></a> <span class="o">**</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="o">.</span><span class="n">SINGLE_TOKENS</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-24"><a href="#PRQL.Tokenizer-24"><span class="linenos">24</span></a> <span class="s2">&quot;=&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-25"><a href="#PRQL.Tokenizer-25"><span class="linenos">25</span></a> <span class="s2">&quot;&#39;&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">QUOTE</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-26"><a href="#PRQL.Tokenizer-26"><span class="linenos">26</span></a> <span class="s1">&#39;&quot;&#39;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">QUOTE</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-27"><a href="#PRQL.Tokenizer-27"><span class="linenos">27</span></a> <span class="s2">&quot;`&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">IDENTIFIER</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-28"><a href="#PRQL.Tokenizer-28"><span class="linenos">28</span></a> <span class="s2">&quot;#&quot;</span><span class="p">:</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">COMMENT</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-29"><a href="#PRQL.Tokenizer-29"><span class="linenos">29</span></a> <span class="p">}</span>
</span><span id="PRQL.Tokenizer-30"><a href="#PRQL.Tokenizer-30"><span class="linenos">30</span></a>
</span><span id="PRQL.Tokenizer-31"><a href="#PRQL.Tokenizer-31"><span class="linenos">31</span></a> <span class="n">KEYWORDS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL.Tokenizer-32"><a href="#PRQL.Tokenizer-32"><span class="linenos">32</span></a> <span class="o">**</span><span class="n">tokens</span><span class="o">.</span><span class="n">Tokenizer</span><span class="o">.</span><span class="n">KEYWORDS</span><span class="p">,</span>
</span><span id="PRQL.Tokenizer-33"><a href="#PRQL.Tokenizer-33"><span class="linenos">33</span></a> <span class="p">}</span>
</span></pre></div>
@ -791,85 +894,123 @@
</div>
<a class="headerlink" href="#PRQL.Parser"></a>
<div class="pdoc-code codehilite"><pre><span></span><span id="PRQL.Parser-29"><a href="#PRQL.Parser-29"><span class="linenos"> 29</span></a> <span class="k">class</span> <span class="nc">Parser</span><span class="p">(</span><span class="n">parser</span><span class="o">.</span><span class="n">Parser</span><span class="p">):</span>
</span><span id="PRQL.Parser-30"><a href="#PRQL.Parser-30"><span class="linenos"> 30</span></a> <span class="n">TRANSFORM_PARSERS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL.Parser-31"><a href="#PRQL.Parser-31"><span class="linenos"> 31</span></a> <span class="s2">&quot;DERIVE&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_selection</span><span class="p">(</span><span class="n">query</span><span class="p">),</span>
</span><span id="PRQL.Parser-32"><a href="#PRQL.Parser-32"><span class="linenos"> 32</span></a> <span class="s2">&quot;SELECT&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_selection</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span>
</span><span id="PRQL.Parser-33"><a href="#PRQL.Parser-33"><span class="linenos"> 33</span></a> <span class="p">}</span>
</span><span id="PRQL.Parser-34"><a href="#PRQL.Parser-34"><span class="linenos"> 34</span></a>
</span><span id="PRQL.Parser-35"><a href="#PRQL.Parser-35"><span class="linenos"> 35</span></a> <span class="k">def</span> <span class="nf">_parse_statement</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="PRQL.Parser-36"><a href="#PRQL.Parser-36"><span class="linenos"> 36</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">()</span>
</span><span id="PRQL.Parser-37"><a href="#PRQL.Parser-37"><span class="linenos"> 37</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span> <span class="k">if</span> <span class="n">expression</span> <span class="k">else</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_query</span><span class="p">()</span>
</span><span id="PRQL.Parser-38"><a href="#PRQL.Parser-38"><span class="linenos"> 38</span></a> <span class="k">return</span> <span class="n">expression</span>
</span><span id="PRQL.Parser-39"><a href="#PRQL.Parser-39"><span class="linenos"> 39</span></a>
</span><span id="PRQL.Parser-40"><a href="#PRQL.Parser-40"><span class="linenos"> 40</span></a> <span class="k">def</span> <span class="nf">_parse_query</span><span class="p">(</span>
</span><span id="PRQL.Parser-41"><a href="#PRQL.Parser-41"><span class="linenos"> 41</span></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="PRQL.Parser-42"><a href="#PRQL.Parser-42"><span class="linenos"> 42</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">]:</span>
</span><span id="PRQL.Parser-43"><a href="#PRQL.Parser-43"><span class="linenos"> 43</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_from</span><span class="p">()</span>
</span><span id="PRQL.Parser-44"><a href="#PRQL.Parser-44"><span class="linenos"> 44</span></a>
</span><span id="PRQL.Parser-45"><a href="#PRQL.Parser-45"><span class="linenos"> 45</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">from_</span><span class="p">:</span>
</span><span id="PRQL.Parser-46"><a href="#PRQL.Parser-46"><span class="linenos"> 46</span></a> <span class="k">return</span> <span class="kc">None</span>
</span><span id="PRQL.Parser-47"><a href="#PRQL.Parser-47"><span class="linenos"> 47</span></a>
</span><span id="PRQL.Parser-48"><a href="#PRQL.Parser-48"><span class="linenos"> 48</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">&quot;*&quot;</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">from_</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="PRQL.Parser-49"><a href="#PRQL.Parser-49"><span class="linenos"> 49</span></a>
</span><span id="PRQL.Parser-50"><a href="#PRQL.Parser-50"><span class="linenos"> 50</span></a> <span class="k">while</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match_texts</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORM_PARSERS</span><span class="p">):</span>
</span><span id="PRQL.Parser-51"><a href="#PRQL.Parser-51"><span class="linenos"> 51</span></a> <span class="n">query</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORM_PARSERS</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_prev</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">upper</span><span class="p">()](</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">)</span>
</span><span id="PRQL.Parser-52"><a href="#PRQL.Parser-52"><span class="linenos"> 52</span></a>
</span><span id="PRQL.Parser-53"><a href="#PRQL.Parser-53"><span class="linenos"> 53</span></a> <span class="k">return</span> <span class="n">query</span>
</span><span id="PRQL.Parser-54"><a href="#PRQL.Parser-54"><span class="linenos"> 54</span></a>
</span><span id="PRQL.Parser-55"><a href="#PRQL.Parser-55"><span class="linenos"> 55</span></a> <span class="k">def</span> <span class="nf">_parse_selection</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">,</span> <span class="n">append</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">:</span>
</span><span id="PRQL.Parser-56"><a href="#PRQL.Parser-56"><span class="linenos"> 56</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">L_BRACE</span><span class="p">):</span>
</span><span id="PRQL.Parser-57"><a href="#PRQL.Parser-57"><span class="linenos"> 57</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_csv</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">)</span>
<div class="pdoc-code codehilite"><pre><span></span><span id="PRQL.Parser-35"><a href="#PRQL.Parser-35"><span class="linenos"> 35</span></a> <span class="k">class</span> <span class="nc">Parser</span><span class="p">(</span><span class="n">parser</span><span class="o">.</span><span class="n">Parser</span><span class="p">):</span>
</span><span id="PRQL.Parser-36"><a href="#PRQL.Parser-36"><span class="linenos"> 36</span></a> <span class="n">CONJUNCTION</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL.Parser-37"><a href="#PRQL.Parser-37"><span class="linenos"> 37</span></a> <span class="o">**</span><span class="n">parser</span><span class="o">.</span><span class="n">Parser</span><span class="o">.</span><span class="n">CONJUNCTION</span><span class="p">,</span>
</span><span id="PRQL.Parser-38"><a href="#PRQL.Parser-38"><span class="linenos"> 38</span></a> <span class="n">TokenType</span><span class="o">.</span><span class="n">DAMP</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">,</span>
</span><span id="PRQL.Parser-39"><a href="#PRQL.Parser-39"><span class="linenos"> 39</span></a> <span class="n">TokenType</span><span class="o">.</span><span class="n">DPIPE</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">,</span>
</span><span id="PRQL.Parser-40"><a href="#PRQL.Parser-40"><span class="linenos"> 40</span></a> <span class="p">}</span>
</span><span id="PRQL.Parser-41"><a href="#PRQL.Parser-41"><span class="linenos"> 41</span></a>
</span><span id="PRQL.Parser-42"><a href="#PRQL.Parser-42"><span class="linenos"> 42</span></a> <span class="n">TRANSFORM_PARSERS</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL.Parser-43"><a href="#PRQL.Parser-43"><span class="linenos"> 43</span></a> <span class="s2">&quot;DERIVE&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_selection</span><span class="p">(</span><span class="n">query</span><span class="p">),</span>
</span><span id="PRQL.Parser-44"><a href="#PRQL.Parser-44"><span class="linenos"> 44</span></a> <span class="s2">&quot;SELECT&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_selection</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span>
</span><span id="PRQL.Parser-45"><a href="#PRQL.Parser-45"><span class="linenos"> 45</span></a> <span class="s2">&quot;TAKE&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_take</span><span class="p">(</span><span class="n">query</span><span class="p">),</span>
</span><span id="PRQL.Parser-46"><a href="#PRQL.Parser-46"><span class="linenos"> 46</span></a> <span class="s2">&quot;FILTER&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">query</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">()),</span>
</span><span id="PRQL.Parser-47"><a href="#PRQL.Parser-47"><span class="linenos"> 47</span></a> <span class="s2">&quot;APPEND&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">query</span><span class="o">.</span><span class="n">union</span><span class="p">(</span>
</span><span id="PRQL.Parser-48"><a href="#PRQL.Parser-48"><span class="linenos"> 48</span></a> <span class="n">_select_all</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">()),</span> <span class="n">distinct</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><span id="PRQL.Parser-49"><a href="#PRQL.Parser-49"><span class="linenos"> 49</span></a> <span class="p">),</span>
</span><span id="PRQL.Parser-50"><a href="#PRQL.Parser-50"><span class="linenos"> 50</span></a> <span class="s2">&quot;REMOVE&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">query</span><span class="o">.</span><span class="n">except_</span><span class="p">(</span>
</span><span id="PRQL.Parser-51"><a href="#PRQL.Parser-51"><span class="linenos"> 51</span></a> <span class="n">_select_all</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">()),</span> <span class="n">distinct</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><span id="PRQL.Parser-52"><a href="#PRQL.Parser-52"><span class="linenos"> 52</span></a> <span class="p">),</span>
</span><span id="PRQL.Parser-53"><a href="#PRQL.Parser-53"><span class="linenos"> 53</span></a> <span class="s2">&quot;INTERSECT&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">query</span><span class="o">.</span><span class="n">intersect</span><span class="p">(</span>
</span><span id="PRQL.Parser-54"><a href="#PRQL.Parser-54"><span class="linenos"> 54</span></a> <span class="n">_select_all</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">()),</span> <span class="n">distinct</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><span id="PRQL.Parser-55"><a href="#PRQL.Parser-55"><span class="linenos"> 55</span></a> <span class="p">),</span>
</span><span id="PRQL.Parser-56"><a href="#PRQL.Parser-56"><span class="linenos"> 56</span></a> <span class="s2">&quot;SORT&quot;</span><span class="p">:</span> <span class="k">lambda</span> <span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_order_by</span><span class="p">(</span><span class="n">query</span><span class="p">),</span>
</span><span id="PRQL.Parser-57"><a href="#PRQL.Parser-57"><span class="linenos"> 57</span></a> <span class="p">}</span>
</span><span id="PRQL.Parser-58"><a href="#PRQL.Parser-58"><span class="linenos"> 58</span></a>
</span><span id="PRQL.Parser-59"><a href="#PRQL.Parser-59"><span class="linenos"> 59</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">R_BRACE</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">query</span><span class="p">):</span>
</span><span id="PRQL.Parser-60"><a href="#PRQL.Parser-60"><span class="linenos"> 60</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">raise_error</span><span class="p">(</span><span class="s2">&quot;Expecting ]&quot;</span><span class="p">)</span>
</span><span id="PRQL.Parser-61"><a href="#PRQL.Parser-61"><span class="linenos"> 61</span></a> <span class="k">else</span><span class="p">:</span>
</span><span id="PRQL.Parser-62"><a href="#PRQL.Parser-62"><span class="linenos"> 62</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">()</span>
</span><span id="PRQL.Parser-63"><a href="#PRQL.Parser-63"><span class="linenos"> 63</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span><span class="n">expression</span><span class="p">]</span> <span class="k">if</span> <span class="n">expression</span> <span class="k">else</span> <span class="p">[]</span>
</span><span id="PRQL.Parser-64"><a href="#PRQL.Parser-64"><span class="linenos"> 64</span></a>
</span><span id="PRQL.Parser-65"><a href="#PRQL.Parser-65"><span class="linenos"> 65</span></a> <span class="n">projections</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL.Parser-66"><a href="#PRQL.Parser-66"><span class="linenos"> 66</span></a> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span> <span class="k">else</span> <span class="n">select</span>
</span><span id="PRQL.Parser-67"><a href="#PRQL.Parser-67"><span class="linenos"> 67</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">query</span><span class="o">.</span><span class="n">selects</span>
</span><span id="PRQL.Parser-68"><a href="#PRQL.Parser-68"><span class="linenos"> 68</span></a> <span class="p">}</span>
</span><span id="PRQL.Parser-59"><a href="#PRQL.Parser-59"><span class="linenos"> 59</span></a> <span class="k">def</span> <span class="nf">_parse_statement</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="PRQL.Parser-60"><a href="#PRQL.Parser-60"><span class="linenos"> 60</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">()</span>
</span><span id="PRQL.Parser-61"><a href="#PRQL.Parser-61"><span class="linenos"> 61</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span> <span class="k">if</span> <span class="n">expression</span> <span class="k">else</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_query</span><span class="p">()</span>
</span><span id="PRQL.Parser-62"><a href="#PRQL.Parser-62"><span class="linenos"> 62</span></a> <span class="k">return</span> <span class="n">expression</span>
</span><span id="PRQL.Parser-63"><a href="#PRQL.Parser-63"><span class="linenos"> 63</span></a>
</span><span id="PRQL.Parser-64"><a href="#PRQL.Parser-64"><span class="linenos"> 64</span></a> <span class="k">def</span> <span class="nf">_parse_query</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">]:</span>
</span><span id="PRQL.Parser-65"><a href="#PRQL.Parser-65"><span class="linenos"> 65</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_from</span><span class="p">()</span>
</span><span id="PRQL.Parser-66"><a href="#PRQL.Parser-66"><span class="linenos"> 66</span></a>
</span><span id="PRQL.Parser-67"><a href="#PRQL.Parser-67"><span class="linenos"> 67</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">from_</span><span class="p">:</span>
</span><span id="PRQL.Parser-68"><a href="#PRQL.Parser-68"><span class="linenos"> 68</span></a> <span class="k">return</span> <span class="kc">None</span>
</span><span id="PRQL.Parser-69"><a href="#PRQL.Parser-69"><span class="linenos"> 69</span></a>
</span><span id="PRQL.Parser-70"><a href="#PRQL.Parser-70"><span class="linenos"> 70</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span>
</span><span id="PRQL.Parser-71"><a href="#PRQL.Parser-71"><span class="linenos"> 71</span></a> <span class="n">select</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span>
</span><span id="PRQL.Parser-72"><a href="#PRQL.Parser-72"><span class="linenos"> 72</span></a> <span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="p">(</span><span class="n">projections</span><span class="p">[</span><span class="n">s</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">if</span> <span class="n">s</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">projections</span> <span class="k">else</span> <span class="n">s</span><span class="p">)</span>
</span><span id="PRQL.Parser-73"><a href="#PRQL.Parser-73"><span class="linenos"> 73</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span>
</span><span id="PRQL.Parser-74"><a href="#PRQL.Parser-74"><span class="linenos"> 74</span></a> <span class="k">else</span> <span class="n">s</span><span class="p">,</span>
</span><span id="PRQL.Parser-75"><a href="#PRQL.Parser-75"><span class="linenos"> 75</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL.Parser-76"><a href="#PRQL.Parser-76"><span class="linenos"> 76</span></a> <span class="p">)</span>
</span><span id="PRQL.Parser-77"><a href="#PRQL.Parser-77"><span class="linenos"> 77</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">selects</span>
</span><span id="PRQL.Parser-78"><a href="#PRQL.Parser-78"><span class="linenos"> 78</span></a> <span class="p">]</span>
</span><span id="PRQL.Parser-79"><a href="#PRQL.Parser-79"><span class="linenos"> 79</span></a>
</span><span id="PRQL.Parser-80"><a href="#PRQL.Parser-80"><span class="linenos"> 80</span></a> <span class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">selects</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="n">append</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="PRQL.Parser-81"><a href="#PRQL.Parser-81"><span class="linenos"> 81</span></a>
</span><span id="PRQL.Parser-82"><a href="#PRQL.Parser-82"><span class="linenos"> 82</span></a> <span class="k">def</span> <span class="nf">_parse_expression</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="PRQL.Parser-83"><a href="#PRQL.Parser-83"><span class="linenos"> 83</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_next</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_next</span><span class="o">.</span><span class="n">token_type</span> <span class="o">==</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">:</span>
</span><span id="PRQL.Parser-84"><a href="#PRQL.Parser-84"><span class="linenos"> 84</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_id_var</span><span class="p">(</span><span class="kc">True</span><span class="p">)</span>
</span><span id="PRQL.Parser-85"><a href="#PRQL.Parser-85"><span class="linenos"> 85</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">)</span>
</span><span id="PRQL.Parser-86"><a href="#PRQL.Parser-86"><span class="linenos"> 86</span></a> <span class="k">return</span> <span class="bp">self</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">Alias</span><span class="p">,</span> <span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">(),</span> <span class="n">alias</span><span class="o">=</span><span class="n">alias</span><span class="p">)</span>
</span><span id="PRQL.Parser-87"><a href="#PRQL.Parser-87"><span class="linenos"> 87</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">()</span>
</span><span id="PRQL.Parser-88"><a href="#PRQL.Parser-88"><span class="linenos"> 88</span></a>
</span><span id="PRQL.Parser-89"><a href="#PRQL.Parser-89"><span class="linenos"> 89</span></a> <span class="k">def</span> <span class="nf">_parse_table</span><span class="p">(</span>
</span><span id="PRQL.Parser-90"><a href="#PRQL.Parser-90"><span class="linenos"> 90</span></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="PRQL.Parser-91"><a href="#PRQL.Parser-91"><span class="linenos"> 91</span></a> <span class="n">schema</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL.Parser-92"><a href="#PRQL.Parser-92"><span class="linenos"> 92</span></a> <span class="n">joins</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL.Parser-93"><a href="#PRQL.Parser-93"><span class="linenos"> 93</span></a> <span class="n">alias_tokens</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Collection</span><span class="p">[</span><span class="n">TokenType</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="PRQL.Parser-94"><a href="#PRQL.Parser-94"><span class="linenos"> 94</span></a> <span class="n">parse_bracket</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL.Parser-95"><a href="#PRQL.Parser-95"><span class="linenos"> 95</span></a> <span class="n">is_db_reference</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL.Parser-96"><a href="#PRQL.Parser-96"><span class="linenos"> 96</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="PRQL.Parser-97"><a href="#PRQL.Parser-97"><span class="linenos"> 97</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_table_parts</span><span class="p">()</span>
</span><span id="PRQL.Parser-98"><a href="#PRQL.Parser-98"><span class="linenos"> 98</span></a>
</span><span id="PRQL.Parser-99"><a href="#PRQL.Parser-99"><span class="linenos"> 99</span></a> <span class="k">def</span> <span class="nf">_parse_from</span><span class="p">(</span>
</span><span id="PRQL.Parser-100"><a href="#PRQL.Parser-100"><span class="linenos">100</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">joins</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> <span class="n">skip_from_token</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span>
</span><span id="PRQL.Parser-101"><a href="#PRQL.Parser-101"><span class="linenos">101</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">]:</span>
</span><span id="PRQL.Parser-102"><a href="#PRQL.Parser-102"><span class="linenos">102</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">skip_from_token</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">FROM</span><span class="p">):</span>
</span><span id="PRQL.Parser-103"><a href="#PRQL.Parser-103"><span class="linenos">103</span></a> <span class="k">return</span> <span class="kc">None</span>
</span><span id="PRQL.Parser-104"><a href="#PRQL.Parser-104"><span class="linenos">104</span></a>
</span><span id="PRQL.Parser-105"><a href="#PRQL.Parser-105"><span class="linenos">105</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">(</span>
</span><span id="PRQL.Parser-106"><a href="#PRQL.Parser-106"><span class="linenos">106</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">comments</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_prev_comments</span><span class="p">,</span> <span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">(</span><span class="n">joins</span><span class="o">=</span><span class="n">joins</span><span class="p">)</span>
</span><span id="PRQL.Parser-107"><a href="#PRQL.Parser-107"><span class="linenos">107</span></a> <span class="p">)</span>
</span><span id="PRQL.Parser-70"><a href="#PRQL.Parser-70"><span class="linenos"> 70</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">&quot;*&quot;</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">from_</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="PRQL.Parser-71"><a href="#PRQL.Parser-71"><span class="linenos"> 71</span></a>
</span><span id="PRQL.Parser-72"><a href="#PRQL.Parser-72"><span class="linenos"> 72</span></a> <span class="k">while</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match_texts</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORM_PARSERS</span><span class="p">):</span>
</span><span id="PRQL.Parser-73"><a href="#PRQL.Parser-73"><span class="linenos"> 73</span></a> <span class="n">query</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORM_PARSERS</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_prev</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">upper</span><span class="p">()](</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">)</span>
</span><span id="PRQL.Parser-74"><a href="#PRQL.Parser-74"><span class="linenos"> 74</span></a>
</span><span id="PRQL.Parser-75"><a href="#PRQL.Parser-75"><span class="linenos"> 75</span></a> <span class="k">return</span> <span class="n">query</span>
</span><span id="PRQL.Parser-76"><a href="#PRQL.Parser-76"><span class="linenos"> 76</span></a>
</span><span id="PRQL.Parser-77"><a href="#PRQL.Parser-77"><span class="linenos"> 77</span></a> <span class="k">def</span> <span class="nf">_parse_selection</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">,</span> <span class="n">append</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">:</span>
</span><span id="PRQL.Parser-78"><a href="#PRQL.Parser-78"><span class="linenos"> 78</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">L_BRACE</span><span class="p">):</span>
</span><span id="PRQL.Parser-79"><a href="#PRQL.Parser-79"><span class="linenos"> 79</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_csv</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">)</span>
</span><span id="PRQL.Parser-80"><a href="#PRQL.Parser-80"><span class="linenos"> 80</span></a>
</span><span id="PRQL.Parser-81"><a href="#PRQL.Parser-81"><span class="linenos"> 81</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">R_BRACE</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">query</span><span class="p">):</span>
</span><span id="PRQL.Parser-82"><a href="#PRQL.Parser-82"><span class="linenos"> 82</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">raise_error</span><span class="p">(</span><span class="s2">&quot;Expecting }&quot;</span><span class="p">)</span>
</span><span id="PRQL.Parser-83"><a href="#PRQL.Parser-83"><span class="linenos"> 83</span></a> <span class="k">else</span><span class="p">:</span>
</span><span id="PRQL.Parser-84"><a href="#PRQL.Parser-84"><span class="linenos"> 84</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_expression</span><span class="p">()</span>
</span><span id="PRQL.Parser-85"><a href="#PRQL.Parser-85"><span class="linenos"> 85</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span><span class="n">expression</span><span class="p">]</span> <span class="k">if</span> <span class="n">expression</span> <span class="k">else</span> <span class="p">[]</span>
</span><span id="PRQL.Parser-86"><a href="#PRQL.Parser-86"><span class="linenos"> 86</span></a>
</span><span id="PRQL.Parser-87"><a href="#PRQL.Parser-87"><span class="linenos"> 87</span></a> <span class="n">projections</span> <span class="o">=</span> <span class="p">{</span>
</span><span id="PRQL.Parser-88"><a href="#PRQL.Parser-88"><span class="linenos"> 88</span></a> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span> <span class="k">else</span> <span class="n">select</span>
</span><span id="PRQL.Parser-89"><a href="#PRQL.Parser-89"><span class="linenos"> 89</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">query</span><span class="o">.</span><span class="n">selects</span>
</span><span id="PRQL.Parser-90"><a href="#PRQL.Parser-90"><span class="linenos"> 90</span></a> <span class="p">}</span>
</span><span id="PRQL.Parser-91"><a href="#PRQL.Parser-91"><span class="linenos"> 91</span></a>
</span><span id="PRQL.Parser-92"><a href="#PRQL.Parser-92"><span class="linenos"> 92</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span>
</span><span id="PRQL.Parser-93"><a href="#PRQL.Parser-93"><span class="linenos"> 93</span></a> <span class="n">select</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span>
</span><span id="PRQL.Parser-94"><a href="#PRQL.Parser-94"><span class="linenos"> 94</span></a> <span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="p">(</span><span class="n">projections</span><span class="p">[</span><span class="n">s</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">if</span> <span class="n">s</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">projections</span> <span class="k">else</span> <span class="n">s</span><span class="p">)</span>
</span><span id="PRQL.Parser-95"><a href="#PRQL.Parser-95"><span class="linenos"> 95</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span>
</span><span id="PRQL.Parser-96"><a href="#PRQL.Parser-96"><span class="linenos"> 96</span></a> <span class="k">else</span> <span class="n">s</span><span class="p">,</span>
</span><span id="PRQL.Parser-97"><a href="#PRQL.Parser-97"><span class="linenos"> 97</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL.Parser-98"><a href="#PRQL.Parser-98"><span class="linenos"> 98</span></a> <span class="p">)</span>
</span><span id="PRQL.Parser-99"><a href="#PRQL.Parser-99"><span class="linenos"> 99</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">selects</span>
</span><span id="PRQL.Parser-100"><a href="#PRQL.Parser-100"><span class="linenos">100</span></a> <span class="p">]</span>
</span><span id="PRQL.Parser-101"><a href="#PRQL.Parser-101"><span class="linenos">101</span></a>
</span><span id="PRQL.Parser-102"><a href="#PRQL.Parser-102"><span class="linenos">102</span></a> <span class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">selects</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="n">append</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="PRQL.Parser-103"><a href="#PRQL.Parser-103"><span class="linenos">103</span></a>
</span><span id="PRQL.Parser-104"><a href="#PRQL.Parser-104"><span class="linenos">104</span></a> <span class="k">def</span> <span class="nf">_parse_take</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">]:</span>
</span><span id="PRQL.Parser-105"><a href="#PRQL.Parser-105"><span class="linenos">105</span></a> <span class="n">num</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_number</span><span class="p">()</span> <span class="c1"># TODO: TAKE for ranges a..b</span>
</span><span id="PRQL.Parser-106"><a href="#PRQL.Parser-106"><span class="linenos">106</span></a> <span class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">limit</span><span class="p">(</span><span class="n">num</span><span class="p">)</span> <span class="k">if</span> <span class="n">num</span> <span class="k">else</span> <span class="kc">None</span>
</span><span id="PRQL.Parser-107"><a href="#PRQL.Parser-107"><span class="linenos">107</span></a>
</span><span id="PRQL.Parser-108"><a href="#PRQL.Parser-108"><span class="linenos">108</span></a> <span class="k">def</span> <span class="nf">_parse_ordered</span><span class="p">(</span>
</span><span id="PRQL.Parser-109"><a href="#PRQL.Parser-109"><span class="linenos">109</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">parse_method</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>
</span><span id="PRQL.Parser-110"><a href="#PRQL.Parser-110"><span class="linenos">110</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">]:</span>
</span><span id="PRQL.Parser-111"><a href="#PRQL.Parser-111"><span class="linenos">111</span></a> <span class="n">asc</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">PLUS</span><span class="p">)</span>
</span><span id="PRQL.Parser-112"><a href="#PRQL.Parser-112"><span class="linenos">112</span></a> <span class="n">desc</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">DASH</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="n">asc</span> <span class="ow">and</span> <span class="kc">False</span><span class="p">)</span>
</span><span id="PRQL.Parser-113"><a href="#PRQL.Parser-113"><span class="linenos">113</span></a> <span class="n">term</span> <span class="o">=</span> <span class="n">term</span> <span class="o">=</span> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="n">_parse_ordered</span><span class="p">(</span><span class="n">parse_method</span><span class="o">=</span><span class="n">parse_method</span><span class="p">)</span>
</span><span id="PRQL.Parser-114"><a href="#PRQL.Parser-114"><span class="linenos">114</span></a> <span class="k">if</span> <span class="n">term</span> <span class="ow">and</span> <span class="n">desc</span><span class="p">:</span>
</span><span id="PRQL.Parser-115"><a href="#PRQL.Parser-115"><span class="linenos">115</span></a> <span class="n">term</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;desc&quot;</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
</span><span id="PRQL.Parser-116"><a href="#PRQL.Parser-116"><span class="linenos">116</span></a> <span class="n">term</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;nulls_first&quot;</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span>
</span><span id="PRQL.Parser-117"><a href="#PRQL.Parser-117"><span class="linenos">117</span></a> <span class="k">return</span> <span class="n">term</span>
</span><span id="PRQL.Parser-118"><a href="#PRQL.Parser-118"><span class="linenos">118</span></a>
</span><span id="PRQL.Parser-119"><a href="#PRQL.Parser-119"><span class="linenos">119</span></a> <span class="k">def</span> <span class="nf">_parse_order_by</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Query</span><span class="p">]:</span>
</span><span id="PRQL.Parser-120"><a href="#PRQL.Parser-120"><span class="linenos">120</span></a> <span class="n">l_brace</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">L_BRACE</span><span class="p">)</span>
</span><span id="PRQL.Parser-121"><a href="#PRQL.Parser-121"><span class="linenos">121</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_csv</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_ordered</span><span class="p">)</span>
</span><span id="PRQL.Parser-122"><a href="#PRQL.Parser-122"><span class="linenos">122</span></a> <span class="k">if</span> <span class="n">l_brace</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">R_BRACE</span><span class="p">):</span>
</span><span id="PRQL.Parser-123"><a href="#PRQL.Parser-123"><span class="linenos">123</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">raise_error</span><span class="p">(</span><span class="s2">&quot;Expecting }&quot;</span><span class="p">)</span>
</span><span id="PRQL.Parser-124"><a href="#PRQL.Parser-124"><span class="linenos">124</span></a> <span class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">order_by</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">,</span> <span class="n">expressions</span><span class="o">=</span><span class="n">expressions</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="PRQL.Parser-125"><a href="#PRQL.Parser-125"><span class="linenos">125</span></a>
</span><span id="PRQL.Parser-126"><a href="#PRQL.Parser-126"><span class="linenos">126</span></a> <span class="k">def</span> <span class="nf">_parse_expression</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="PRQL.Parser-127"><a href="#PRQL.Parser-127"><span class="linenos">127</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_next</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_next</span><span class="o">.</span><span class="n">token_type</span> <span class="o">==</span> <span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">:</span>
</span><span id="PRQL.Parser-128"><a href="#PRQL.Parser-128"><span class="linenos">128</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_id_var</span><span class="p">(</span><span class="kc">True</span><span class="p">)</span>
</span><span id="PRQL.Parser-129"><a href="#PRQL.Parser-129"><span class="linenos">129</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">ALIAS</span><span class="p">)</span>
</span><span id="PRQL.Parser-130"><a href="#PRQL.Parser-130"><span class="linenos">130</span></a> <span class="k">return</span> <span class="bp">self</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">Alias</span><span class="p">,</span> <span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">(),</span> <span class="n">alias</span><span class="o">=</span><span class="n">alias</span><span class="p">)</span>
</span><span id="PRQL.Parser-131"><a href="#PRQL.Parser-131"><span class="linenos">131</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_conjunction</span><span class="p">()</span>
</span><span id="PRQL.Parser-132"><a href="#PRQL.Parser-132"><span class="linenos">132</span></a>
</span><span id="PRQL.Parser-133"><a href="#PRQL.Parser-133"><span class="linenos">133</span></a> <span class="k">def</span> <span class="nf">_parse_table</span><span class="p">(</span>
</span><span id="PRQL.Parser-134"><a href="#PRQL.Parser-134"><span class="linenos">134</span></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="PRQL.Parser-135"><a href="#PRQL.Parser-135"><span class="linenos">135</span></a> <span class="n">schema</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL.Parser-136"><a href="#PRQL.Parser-136"><span class="linenos">136</span></a> <span class="n">joins</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL.Parser-137"><a href="#PRQL.Parser-137"><span class="linenos">137</span></a> <span class="n">alias_tokens</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Collection</span><span class="p">[</span><span class="n">TokenType</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="PRQL.Parser-138"><a href="#PRQL.Parser-138"><span class="linenos">138</span></a> <span class="n">parse_bracket</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL.Parser-139"><a href="#PRQL.Parser-139"><span class="linenos">139</span></a> <span class="n">is_db_reference</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
</span><span id="PRQL.Parser-140"><a href="#PRQL.Parser-140"><span class="linenos">140</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span>
</span><span id="PRQL.Parser-141"><a href="#PRQL.Parser-141"><span class="linenos">141</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_table_parts</span><span class="p">()</span>
</span><span id="PRQL.Parser-142"><a href="#PRQL.Parser-142"><span class="linenos">142</span></a>
</span><span id="PRQL.Parser-143"><a href="#PRQL.Parser-143"><span class="linenos">143</span></a> <span class="k">def</span> <span class="nf">_parse_from</span><span class="p">(</span>
</span><span id="PRQL.Parser-144"><a href="#PRQL.Parser-144"><span class="linenos">144</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">joins</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> <span class="n">skip_from_token</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span>
</span><span id="PRQL.Parser-145"><a href="#PRQL.Parser-145"><span class="linenos">145</span></a> <span class="p">)</span> <span class="o">-&gt;</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">]:</span>
</span><span id="PRQL.Parser-146"><a href="#PRQL.Parser-146"><span class="linenos">146</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">skip_from_token</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_match</span><span class="p">(</span><span class="n">TokenType</span><span class="o">.</span><span class="n">FROM</span><span class="p">):</span>
</span><span id="PRQL.Parser-147"><a href="#PRQL.Parser-147"><span class="linenos">147</span></a> <span class="k">return</span> <span class="kc">None</span>
</span><span id="PRQL.Parser-148"><a href="#PRQL.Parser-148"><span class="linenos">148</span></a>
</span><span id="PRQL.Parser-149"><a href="#PRQL.Parser-149"><span class="linenos">149</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">(</span>
</span><span id="PRQL.Parser-150"><a href="#PRQL.Parser-150"><span class="linenos">150</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">comments</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_prev_comments</span><span class="p">,</span> <span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_parse_table</span><span class="p">(</span><span class="n">joins</span><span class="o">=</span><span class="n">joins</span><span class="p">)</span>
</span><span id="PRQL.Parser-151"><a href="#PRQL.Parser-151"><span class="linenos">151</span></a> <span class="p">)</span>
</span></pre></div>
@ -890,10 +1031,24 @@ Default: 3</li>
</div>
<div id="PRQL.Parser.CONJUNCTION" class="classattr">
<div class="attr variable">
<span class="name">CONJUNCTION</span> =
<input id="PRQL.Parser.CONJUNCTION-view-value" class="view-value-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
<label class="view-value-button pdoc-button" for="PRQL.Parser.CONJUNCTION-view-value"></label><span class="default_value">{&lt;TokenType.AND: &#39;AND&#39;&gt;: &lt;class &#39;<a href="../expressions.html#And">sqlglot.expressions.And</a>&#39;&gt;, &lt;TokenType.OR: &#39;OR&#39;&gt;: &lt;class &#39;<a href="../expressions.html#Or">sqlglot.expressions.Or</a>&#39;&gt;, &lt;TokenType.DAMP: &#39;DAMP&#39;&gt;: &lt;class &#39;<a href="../expressions.html#And">sqlglot.expressions.And</a>&#39;&gt;, &lt;TokenType.DPIPE: &#39;DPIPE&#39;&gt;: &lt;class &#39;<a href="../expressions.html#Or">sqlglot.expressions.Or</a>&#39;&gt;}</span>
</div>
<a class="headerlink" href="#PRQL.Parser.CONJUNCTION"></a>
</div>
<div id="PRQL.Parser.TRANSFORM_PARSERS" class="classattr">
<div class="attr variable">
<span class="name">TRANSFORM_PARSERS</span> =
<span class="default_value">{&#39;DERIVE&#39;: &lt;function <a href="#PRQL.Parser">PRQL.Parser</a>.&lt;lambda&gt;&gt;, &#39;SELECT&#39;: &lt;function <a href="#PRQL.Parser">PRQL.Parser</a>.&lt;lambda&gt;&gt;}</span>
<input id="PRQL.Parser.TRANSFORM_PARSERS-view-value" class="view-value-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
<label class="view-value-button pdoc-button" for="PRQL.Parser.TRANSFORM_PARSERS-view-value"></label><span class="default_value">{&#39;DERIVE&#39;: &lt;function <a href="#PRQL.Parser">PRQL.Parser</a>.&lt;lambda&gt;&gt;, &#39;SELECT&#39;: &lt;function <a href="#PRQL.Parser">PRQL.Parser</a>.&lt;lambda&gt;&gt;, &#39;TAKE&#39;: &lt;function <a href="#PRQL.Parser">PRQL.Parser</a>.&lt;lambda&gt;&gt;, &#39;FILTER&#39;: &lt;function <a href="#PRQL.Parser">PRQL.Parser</a>.&lt;lambda&gt;&gt;, &#39;APPEND&#39;: &lt;function <a href="#PRQL.Parser">PRQL.Parser</a>.&lt;lambda&gt;&gt;, &#39;REMOVE&#39;: &lt;function <a href="#PRQL.Parser">PRQL.Parser</a>.&lt;lambda&gt;&gt;, &#39;INTERSECT&#39;: &lt;function <a href="#PRQL.Parser">PRQL.Parser</a>.&lt;lambda&gt;&gt;, &#39;SORT&#39;: &lt;function <a href="#PRQL.Parser">PRQL.Parser</a>.&lt;lambda&gt;&gt;}</span>
</div>
@ -951,7 +1106,6 @@ Default: 3</li>
<dd id="PRQL.Parser.UPDATE_ALIAS_TOKENS" class="variable"><a href="../parser.html#Parser.UPDATE_ALIAS_TOKENS">UPDATE_ALIAS_TOKENS</a></dd>
<dd id="PRQL.Parser.TRIM_TYPES" class="variable"><a href="../parser.html#Parser.TRIM_TYPES">TRIM_TYPES</a></dd>
<dd id="PRQL.Parser.FUNC_TOKENS" class="variable"><a href="../parser.html#Parser.FUNC_TOKENS">FUNC_TOKENS</a></dd>
<dd id="PRQL.Parser.CONJUNCTION" class="variable"><a href="../parser.html#Parser.CONJUNCTION">CONJUNCTION</a></dd>
<dd id="PRQL.Parser.EQUALITY" class="variable"><a href="../parser.html#Parser.EQUALITY">EQUALITY</a></dd>
<dd id="PRQL.Parser.COMPARISON" class="variable"><a href="../parser.html#Parser.COMPARISON">COMPARISON</a></dd>
<dd id="PRQL.Parser.BITWISE" class="variable"><a href="../parser.html#Parser.BITWISE">BITWISE</a></dd>

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