diff options
Diffstat (limited to 'docs/sqlglot/transforms.html')
| -rw-r--r-- | docs/sqlglot/transforms.html | 1279 |
1 files changed, 733 insertions, 546 deletions
diff --git a/docs/sqlglot/transforms.html b/docs/sqlglot/transforms.html index dd37ff3..25467cd 100644 --- a/docs/sqlglot/transforms.html +++ b/docs/sqlglot/transforms.html @@ -67,6 +67,12 @@ <a class="function" href="#eliminate_semi_and_anti_joins">eliminate_semi_and_anti_joins</a> </li> <li> + <a class="function" href="#eliminate_full_outer_join">eliminate_full_outer_join</a> + </li> + <li> + <a class="function" href="#move_ctes_to_top_level">move_ctes_to_top_level</a> + </li> + <li> <a class="function" href="#preprocess">preprocess</a> </li> </ul> @@ -161,7 +167,7 @@ </span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">)</span> </span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> </span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="k">if</span> <span class="n">order</span><span class="p">:</span> -</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="n">window</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">order</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> +</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="n">window</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">order</span><span class="o">.</span><span class="n">pop</span><span class="p">())</span> </span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="k">else</span><span class="p">:</span> </span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="n">window</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">c</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">distinct_cols</span><span class="p">]))</span> </span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> @@ -169,9 +175,9 @@ </span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">window</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> </span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> </span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="k">return</span> <span class="p">(</span> -</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">outer_selects</span><span class="p">)</span> -</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="s2">"_t"</span><span class="p">))</span> -</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">row_number</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="mi">1</span><span class="p">))</span> +</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">outer_selects</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-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="s2">"_t"</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">row_number</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> </span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="p">)</span> </span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> </span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="k">return</span> <span class="n">expression</span> @@ -214,298 +220,360 @@ </span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="k">elif</span> <span class="n">expr</span><span class="o">.</span><span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">:</span> </span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">expr</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> </span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> -</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="k">return</span> <span class="n">outer_selects</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="n">alias</span><span class="o">=</span><span class="s2">"_t"</span><span class="p">))</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">qualify_filters</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">return</span> <span class="n">expression</span> +</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="k">return</span> <span class="n">outer_selects</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="n">alias</span><span class="o">=</span><span class="s2">"_t"</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span><span class="o">.</span><span class="n">where</span><span class="p">(</span> +</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="n">qualify_filters</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span> +</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="p">)</span> </span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> -</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> -</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a><span class="k">def</span> <span class="nf">remove_precision_parameterized_types</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a><span class="sd"> Some dialects only allow the precision for parameterized types to be defined in the DDL and not in</span> -</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a><span class="sd"> other expressions. This transforms removes the precision from parameterized types in expressions.</span> -</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a><span class="sd"> """</span> -</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">):</span> -</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="n">node</span><span class="o">.</span><span class="n">set</span><span class="p">(</span> -</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="s2">"expressions"</span><span class="p">,</span> <span class="p">[</span><span class="n">e</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">expressions</span> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataTypeParam</span><span class="p">)]</span> -</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> <span class="p">)</span> -</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> -</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> +</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> +</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a><span class="k">def</span> <span class="nf">remove_precision_parameterized_types</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a><span class="sd"> Some dialects only allow the precision for parameterized types to be defined in the DDL and not in</span> +</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a><span class="sd"> other expressions. This transforms removes the precision from parameterized types in expressions.</span> +</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a><span class="sd"> """</span> +</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">):</span> +</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> <span class="n">node</span><span class="o">.</span><span class="n">set</span><span class="p">(</span> +</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="s2">"expressions"</span><span class="p">,</span> <span class="p">[</span><span class="n">e</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">expressions</span> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataTypeParam</span><span class="p">)]</span> +</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="p">)</span> </span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> -</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> -</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a><span class="k">def</span> <span class="nf">unnest_to_explode</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a><span class="w"> </span><span class="sd">"""Convert cross join unnest into lateral view explode (used in presto -> hive)."""</span> -</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> -</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> <span class="n">unnest</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> -</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">):</span> -</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> -</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Posexplode</span> <span class="k">if</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"offset"</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">Explode</span> -</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> -</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"joins"</span><span class="p">]</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">join</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="n">expression</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><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a><span class="k">def</span> <span class="nf">unnest_to_explode</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a><span class="w"> </span><span class="sd">"""Convert cross join unnest into lateral view explode (used in presto -> hive)."""</span> +</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> +</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="n">unnest</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> +</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">):</span> +</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> +</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Posexplode</span> <span class="k">if</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"offset"</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">Explode</span> </span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> -</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="k">for</span> <span class="n">e</span><span class="p">,</span> <span class="n">column</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span><span class="p">,</span> <span class="n">alias</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">alias</span> <span class="k">else</span> <span class="p">[]):</span> -</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> -</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="s2">"laterals"</span><span class="p">,</span> -</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Lateral</span><span class="p">(</span> -</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="n">this</span><span class="o">=</span><span class="n">udtf</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">e</span><span class="p">),</span> -</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="n">view</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> -</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">alias</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">columns</span><span class="o">=</span><span class="p">[</span><span class="n">column</span><span class="p">]),</span> <span class="c1"># type: ignore</span> -</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="p">),</span> -</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="p">)</span> -</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> -</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"joins"</span><span class="p">]</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">join</span><span class="p">)</span> +</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> +</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="k">for</span> <span class="n">e</span><span class="p">,</span> <span class="n">column</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span><span class="p">,</span> <span class="n">alias</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">alias</span> <span class="k">else</span> <span class="p">[]):</span> +</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="s2">"laterals"</span><span class="p">,</span> +</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Lateral</span><span class="p">(</span> +</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="n">this</span><span class="o">=</span><span class="n">udtf</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">e</span><span class="p">),</span> +</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="n">view</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> +</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">alias</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">columns</span><span class="o">=</span><span class="p">[</span><span class="n">column</span><span class="p">]),</span> <span class="c1"># type: ignore</span> +</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="p">),</span> +</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="p">)</span> </span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> -</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> -</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a><span class="k">def</span> <span class="nf">explode_to_unnest</span><span class="p">(</span><span class="n">index_offset</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">0</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span> -</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="k">def</span> <span class="nf">_explode_to_unnest</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a><span class="w"> </span><span class="sd">"""Convert explode/posexplode into unnest (used in hive -> presto)."""</span> -</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> <span class="kn">from</span> <span class="nn">sqlglot.optimizer.scope</span> <span class="kn">import</span> <span class="n">Scope</span> -</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> -</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> <span class="n">taken_select_names</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">)</span> -</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="n">taken_source_names</span> <span class="o">=</span> <span class="p">{</span><span class="n">name</span> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">_</span> <span class="ow">in</span> <span class="n">Scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span><span class="o">.</span><span class="n">references</span><span class="p">}</span> +</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> +</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> +</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a><span class="k">def</span> <span class="nf">explode_to_unnest</span><span class="p">(</span><span class="n">index_offset</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">0</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span> +</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a><span class="w"> </span><span class="sd">"""Convert explode/posexplode into unnest (used in hive -> presto)."""</span> +</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> +</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="k">def</span> <span class="nf">_explode_to_unnest</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="kn">from</span> <span class="nn">sqlglot.optimizer.scope</span> <span class="kn">import</span> <span class="n">Scope</span> </span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> -</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="k">def</span> <span class="nf">new_name</span><span class="p">(</span><span class="n">names</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> -</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">names</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> -</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="n">names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="k">return</span> <span class="n">name</span> -</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> -</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="n">arrays</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">]</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="n">series_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span> -</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="n">series</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span> -</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span> -</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">GenerateSeries</span><span class="p">(</span><span class="n">start</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">index_offset</span><span class="p">))]</span> -</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="p">),</span> -</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_source_names</span><span class="p">,</span> <span class="s2">"_u"</span><span class="p">),</span> -</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">series_alias</span><span class="p">],</span> -</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="p">)</span> -</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> -</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="c1"># we use list here because expression.selects is mutated inside the loop</span> -</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="o">.</span><span class="n">copy</span><span class="p">():</span> -</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="n">explode</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Explode</span><span class="p">)</span> -</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> -</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="k">if</span> <span class="n">explode</span><span class="p">:</span> -</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="s2">""</span> -</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="s2">""</span> -</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a> -</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> -</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">alias</span> -</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span> -</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Aliases</span><span class="p">):</span> -</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">aliases</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">name</span> -</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">aliases</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">name</span> -</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="s2">""</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span> -</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="s2">""</span><span class="p">))</span> -</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="n">explode</span> <span class="o">=</span> <span class="n">alias</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Explode</span><span class="p">)</span> -</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> <span class="k">assert</span> <span class="n">explode</span> -</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> -</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="n">is_posexplode</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Posexplode</span><span class="p">)</span> -</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> <span class="n">explode_arg</span> <span class="o">=</span> <span class="n">explode</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="n">taken_select_names</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">)</span> +</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="n">taken_source_names</span> <span class="o">=</span> <span class="p">{</span><span class="n">name</span> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">_</span> <span class="ow">in</span> <span class="n">Scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span><span class="o">.</span><span class="n">references</span><span class="p">}</span> +</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> +</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="k">def</span> <span class="nf">new_name</span><span class="p">(</span><span class="n">names</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> +</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">names</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> +</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="n">names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="k">return</span> <span class="n">name</span> +</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> +</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="n">arrays</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">]</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="n">series_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span> +</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="n">series</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span> +</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span> +</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">GenerateSeries</span><span class="p">(</span><span class="n">start</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">index_offset</span><span class="p">))]</span> +</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="p">),</span> +</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_source_names</span><span class="p">,</span> <span class="s2">"_u"</span><span class="p">),</span> +</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">series_alias</span><span class="p">],</span> +</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="p">)</span> +</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> +</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="c1"># we use list here because expression.selects is mutated inside the loop</span> +</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span> +</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="n">explode</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Explode</span><span class="p">)</span> +</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> +</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a> <span class="k">if</span> <span class="n">explode</span><span class="p">:</span> +</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="s2">""</span> +</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="s2">""</span> +</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> +</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> +</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">alias</span> +</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span> +</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Aliases</span><span class="p">):</span> +</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">aliases</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">aliases</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="s2">""</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span> +</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="s2">""</span><span class="p">))</span> +</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="n">explode</span> <span class="o">=</span> <span class="n">alias</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Explode</span><span class="p">)</span> +</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> <span class="k">assert</span> <span class="n">explode</span> </span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a> -</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> <span class="c1"># This ensures that we won't use [POS]EXPLODE's argument as a new selection</span> -</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode_arg</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> -</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> <span class="n">taken_select_names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">output_name</span><span class="p">)</span> -</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> -</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> <span class="n">unnest_source_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_source_names</span><span class="p">,</span> <span class="s2">"_u"</span><span class="p">)</span> -</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> -</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">explode_alias</span><span class="p">:</span> -</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"col"</span><span class="p">)</span> +</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> <span class="n">is_posexplode</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Posexplode</span><span class="p">)</span> +</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> <span class="n">explode_arg</span> <span class="o">=</span> <span class="n">explode</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> +</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> <span class="c1"># This ensures that we won't use [POS]EXPLODE's argument as a new selection</span> +</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode_arg</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> +</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> <span class="n">taken_select_names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">output_name</span><span class="p">)</span> +</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> +</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> <span class="n">unnest_source_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_source_names</span><span class="p">,</span> <span class="s2">"_u"</span><span class="p">)</span> </span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> -</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a> <span class="k">if</span> <span class="n">is_posexplode</span><span class="p">:</span> -</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span> +</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">explode_alias</span><span class="p">:</span> +</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"col"</span><span class="p">)</span> </span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a> -</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">pos_alias</span><span class="p">:</span> -</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span> +</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> <span class="k">if</span> <span class="n">is_posexplode</span><span class="p">:</span> +</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span> </span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a> -</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a> <span class="n">alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">explode_alias</span><span class="p">))</span> -</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a> -</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">If</span><span class="p">(</span> -</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">)),</span> -</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> <span class="n">true</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">explode_alias</span><span class="p">),</span> -</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> <span class="p">)</span> -</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> -</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="n">explode</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> -</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a> -</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a> <span class="k">if</span> <span class="n">is_posexplode</span><span class="p">:</span> -</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span> -</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span> -</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span> -</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">If</span><span class="p">(</span> -</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">)),</span> -</span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> <span class="n">true</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span> -</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a> <span class="p">)</span><span class="o">.</span><span class="n">as_</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span> -</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a> <span class="p">)</span> -</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">expressions</span><span class="p">)</span> -</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a> -</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">arrays</span><span class="p">:</span> -</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">):</span> -</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">series</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">series</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a> -</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="n">size</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Condition</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">ArraySize</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> -</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="n">arrays</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">size</span><span class="p">)</span> +</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">pos_alias</span><span class="p">:</span> +</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span> +</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a> +</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> <span class="n">alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">explode_alias</span><span class="p">))</span> +</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> +</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">If</span><span class="p">(</span> +</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">)),</span> +</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="n">true</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">explode_alias</span><span class="p">),</span> +</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a> <span class="p">)</span> +</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a> +</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a> <span class="n">explode</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> +</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> +</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="k">if</span> <span class="n">is_posexplode</span><span class="p">:</span> +</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span> +</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span> +</span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span> +</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">If</span><span class="p">(</span> +</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">)),</span> +</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a> <span class="n">true</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span> +</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a> <span class="p">)</span><span class="o">.</span><span class="n">as_</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span> +</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a> <span class="p">)</span> +</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">expressions</span><span class="p">)</span> +</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a> +</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">arrays</span><span class="p">:</span> +</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">):</span> +</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">series</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">series</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> </span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> -</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="c1"># trino doesn't support left join unnest with on conditions</span> -</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="c1"># if it did, this would be much simpler</span> -</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> -</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span> -</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span> -</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">copy</span><span class="p">()],</span> -</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="n">offset</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span> -</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> <span class="p">),</span> -</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="n">unnest_source_alias</span><span class="p">,</span> -</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">explode_alias</span><span class="p">],</span> -</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> <span class="p">),</span> -</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">,</span> -</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="p">)</span> -</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> -</span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> <span class="k">if</span> <span class="n">index_offset</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span> -</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="n">size</span> <span class="o">=</span> <span class="n">size</span> <span class="o">-</span> <span class="mi">1</span> +</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="n">size</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Condition</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">ArraySize</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> +</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="n">arrays</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">size</span><span class="p">)</span> +</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> +</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="c1"># trino doesn't support left join unnest with on conditions</span> +</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> <span class="c1"># if it did, this would be much simpler</span> +</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> +</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span> +</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span> +</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">copy</span><span class="p">()],</span> +</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="n">offset</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span> +</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> <span class="p">),</span> +</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="n">unnest_source_alias</span><span class="p">,</span> +</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">explode_alias</span><span class="p">],</span> +</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="p">),</span> +</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">,</span> +</span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="p">)</span> </span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> -</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span> -</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span> -</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a> <span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">))</span> -</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a> <span class="o">.</span><span class="n">or_</span><span class="p">(</span> -</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span> <span class="o">></span> <span class="n">size</span><span class="p">)</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">size</span><span class="p">))</span> -</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a> <span class="p">),</span> -</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a> <span class="p">)</span> -</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a> -</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a> <span class="k">if</span> <span class="n">arrays</span><span class="p">:</span> -</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a> <span class="n">end</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Condition</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Greatest</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">arrays</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">expressions</span><span class="o">=</span><span class="n">arrays</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span> +</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> <span class="k">if</span> <span class="n">index_offset</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> <span class="n">size</span> <span class="o">=</span> <span class="n">size</span> <span class="o">-</span> <span class="mi">1</span> +</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a> +</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span> +</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span> +</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a> <span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">))</span> +</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a> <span class="o">.</span><span class="n">or_</span><span class="p">(</span> +</span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span> <span class="o">></span> <span class="n">size</span><span class="p">)</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">size</span><span class="p">))</span> +</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a> <span class="p">),</span> +</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a> <span class="p">)</span> </span><span id="L-286"><a href="#L-286"><span class="linenos">286</span></a> -</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a> <span class="k">if</span> <span class="n">index_offset</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span> -</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a> <span class="n">end</span> <span class="o">=</span> <span class="n">end</span> <span class="o">-</span> <span class="p">(</span><span class="mi">1</span> <span class="o">-</span> <span class="n">index_offset</span><span class="p">)</span> -</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a> <span class="n">series</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"end"</span><span class="p">,</span> <span class="n">end</span><span class="p">)</span> -</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a> -</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a> -</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> <span class="k">return</span> <span class="n">_explode_to_unnest</span> -</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> +</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a> <span class="k">if</span> <span class="n">arrays</span><span class="p">:</span> +</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a> <span class="n">end</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Condition</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Greatest</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">arrays</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">expressions</span><span class="o">=</span><span class="n">arrays</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span> +</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a> +</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a> <span class="k">if</span> <span class="n">index_offset</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a> <span class="n">end</span> <span class="o">=</span> <span class="n">end</span> <span class="o">-</span> <span class="p">(</span><span class="mi">1</span> <span class="o">-</span> <span class="n">index_offset</span><span class="p">)</span> +</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a> <span class="n">series</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"end"</span><span class="p">,</span> <span class="n">end</span><span class="p">)</span> +</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> +</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> <span class="k">return</span> <span class="n">expression</span> </span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a> -</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a><span class="n">PERCENTILES</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">PercentileCont</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">PercentileDisc</span><span class="p">)</span> +</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a> <span class="k">return</span> <span class="n">_explode_to_unnest</span> </span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> </span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a> -</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a><span class="k">def</span> <span class="nf">add_within_group_for_percentiles</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">PERCENTILES</span><span class="p">)</span> -</span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">)</span> -</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span> -</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a> <span class="p">):</span> -</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">pop</span><span class="p">())</span> -</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">column</span><span class="p">)])</span> -</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">order</span><span class="p">)</span> -</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a> -</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a> -</span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a> -</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a><span class="k">def</span> <span class="nf">remove_within_group_for_percentiles</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">)</span> -</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">PERCENTILES</span><span class="p">)</span> -</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">)</span> -</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> <span class="p">):</span> -</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="n">quantile</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="n">input_value</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">))</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">ApproxQuantile</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">input_value</span><span class="p">,</span> <span class="n">quantile</span><span class="o">=</span><span class="n">quantile</span><span class="p">))</span> -</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> -</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a> -</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a> -</span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a><span class="k">def</span> <span class="nf">add_recursive_cte_column_names</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span> -</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a> <span class="n">next_name</span> <span class="o">=</span> <span class="n">name_sequence</span><span class="p">(</span><span class="s2">"_c_"</span><span class="p">)</span> +</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a><span class="n">PERCENTILES</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">PercentileCont</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">PercentileDisc</span><span class="p">)</span> +</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> +</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> +</span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a><span class="k">def</span> <span class="nf">add_within_group_for_percentiles</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a><span class="w"> </span><span class="sd">"""Transforms percentiles by adding a WITHIN GROUP clause to them."""</span> +</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">PERCENTILES</span><span class="p">)</span> +</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">)</span> +</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span> +</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a> <span class="p">):</span> +</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">pop</span><span class="p">())</span> +</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">column</span><span class="p">)])</span> +</span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">order</span><span class="p">)</span> +</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> +</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> +</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a> +</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a><span class="k">def</span> <span class="nf">remove_within_group_for_percentiles</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a><span class="w"> </span><span class="sd">"""Transforms percentiles by getting rid of their corresponding WITHIN GROUP clause."""</span> +</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">)</span> +</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">PERCENTILES</span><span class="p">)</span> +</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">)</span> +</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> <span class="p">):</span> +</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a> <span class="n">quantile</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a> <span class="n">input_value</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">))</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">ApproxQuantile</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">input_value</span><span class="p">,</span> <span class="n">quantile</span><span class="o">=</span><span class="n">quantile</span><span class="p">))</span> +</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> +</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a> <span class="k">return</span> <span class="n">expression</span> </span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a> -</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a> <span class="k">for</span> <span class="n">cte</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> -</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">cte</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> -</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> -</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a> +</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a><span class="k">def</span> <span class="nf">add_recursive_cte_column_names</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a><span class="w"> </span><span class="sd">"""Uses projection output names in recursive CTE definitions to define the CTEs' columns."""</span> +</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span> +</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> <span class="n">next_name</span> <span class="o">=</span> <span class="n">name_sequence</span><span class="p">(</span><span class="s2">"_c_"</span><span class="p">)</span> </span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a> -</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span> -</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> <span class="s2">"columns"</span><span class="p">,</span> -</span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">or</span> <span class="n">next_name</span><span class="p">())</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">query</span><span class="o">.</span><span class="n">selects</span><span class="p">],</span> -</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a> <span class="p">)</span> -</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a> -</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a> -</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a> -</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a><span class="k">def</span> <span class="nf">epoch_cast_to_ts</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TryCast</span><span class="p">))</span> -</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">name</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s2">"epoch"</span> -</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEMPORAL_TYPES</span> -</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> <span class="p">):</span> -</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">string</span><span class="p">(</span><span class="s2">"1970-01-01 00:00:00"</span><span class="p">))</span> -</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a> -</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a> -</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> -</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a><span class="k">def</span> <span class="nf">eliminate_semi_and_anti_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> -</span><span id="L-358"><a href="#L-358"><span class="linenos">358</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span> -</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a> <span class="k">if</span> <span class="n">on</span> <span class="ow">and</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="ow">in</span> <span class="p">(</span><span class="s2">"SEMI"</span><span class="p">,</span> <span class="s2">"ANTI"</span><span class="p">):</span> -</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a> <span class="n">subquery</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">"1"</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="p">)</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">on</span><span class="p">)</span> -</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="n">exists</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">subquery</span><span class="p">)</span> -</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="o">==</span> <span class="s2">"ANTI"</span><span class="p">:</span> -</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> <span class="n">exists</span> <span class="o">=</span> <span class="n">exists</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> -</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> <span class="n">join</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exists</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a> -</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> -</span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a> -</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a><span class="k">def</span> <span class="nf">preprocess</span><span class="p">(</span> -</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a> <span class="n">transforms</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]],</span> -</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">Generator</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="nb">str</span><span class="p">]:</span> -</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a><span class="sd"> Creates a new transform by chaining a sequence of transformations and converts the resulting</span> -</span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a><span class="sd"> expression to SQL, using either the "_sql" method corresponding to the resulting expression,</span> -</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a><span class="sd"> or the appropriate `Generator.TRANSFORMS` function (when applicable -- see below).</span> +</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="k">for</span> <span class="n">cte</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> +</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">cte</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> +</span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> +</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a> +</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span> +</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a> <span class="s2">"columns"</span><span class="p">,</span> +</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">or</span> <span class="n">next_name</span><span class="p">())</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">query</span><span class="o">.</span><span class="n">selects</span><span class="p">],</span> +</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a> <span class="p">)</span> +</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a> +</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a> +</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> +</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a><span class="k">def</span> <span class="nf">epoch_cast_to_ts</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a><span class="w"> </span><span class="sd">"""Replace 'epoch' in casts by the equivalent date literal."""</span> +</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TryCast</span><span class="p">))</span> +</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">name</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s2">"epoch"</span> +</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEMPORAL_TYPES</span> +</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a> <span class="p">):</span> +</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">string</span><span class="p">(</span><span class="s2">"1970-01-01 00:00:00"</span><span class="p">))</span> +</span><span id="L-358"><a href="#L-358"><span class="linenos">358</span></a> +</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a> +</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> +</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a><span class="k">def</span> <span class="nf">eliminate_semi_and_anti_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a><span class="w"> </span><span class="sd">"""Convert SEMI and ANTI joins into equivalent forms that use EXIST instead."""</span> +</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> +</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span> +</span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a> <span class="k">if</span> <span class="n">on</span> <span class="ow">and</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="ow">in</span> <span class="p">(</span><span class="s2">"SEMI"</span><span class="p">,</span> <span class="s2">"ANTI"</span><span class="p">):</span> +</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> <span class="n">subquery</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">"1"</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="p">)</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">on</span><span class="p">)</span> +</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> <span class="n">exists</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">subquery</span><span class="p">)</span> +</span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="o">==</span> <span class="s2">"ANTI"</span><span class="p">:</span> +</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a> <span class="n">exists</span> <span class="o">=</span> <span class="n">exists</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a> +</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a> <span class="n">join</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exists</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a> +</span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a> </span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a> -</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a><span class="sd"> Args:</span> -</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a><span class="sd"> transforms: sequence of transform functions. These will be called in order.</span> -</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> -</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a><span class="sd"> Returns:</span> -</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a><span class="sd"> Function that can be used as a generator transform.</span> +</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a><span class="k">def</span> <span class="nf">eliminate_full_outer_join</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a><span class="sd"> Converts a query with a FULL OUTER join to a union of identical queries that</span> +</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a><span class="sd"> use LEFT/RIGHT OUTER joins instead. This transformation currently only works</span> +</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a><span class="sd"> for queries that have a single FULL OUTER join.</span> </span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a><span class="sd"> """</span> -</span><span id="L-385"><a href="#L-385"><span class="linenos">385</span></a> -</span><span id="L-386"><a href="#L-386"><span class="linenos">386</span></a> <span class="k">def</span> <span class="nf">_to_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> -</span><span id="L-387"><a href="#L-387"><span class="linenos">387</span></a> <span class="n">expression_type</span> <span class="o">=</span> <span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-388"><a href="#L-388"><span class="linenos">388</span></a> -</span><span id="L-389"><a href="#L-389"><span class="linenos">389</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">transforms</span><span class="p">[</span><span class="mi">0</span><span class="p">](</span><span class="n">expression</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> -</span><span id="L-390"><a href="#L-390"><span class="linenos">390</span></a> <span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="n">transforms</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span> -</span><span id="L-391"><a href="#L-391"><span class="linenos">391</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">t</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-392"><a href="#L-392"><span class="linenos">392</span></a> -</span><span id="L-393"><a href="#L-393"><span class="linenos">393</span></a> <span class="n">_sql_handler</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">key</span> <span class="o">+</span> <span class="s2">"_sql"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="L-394"><a href="#L-394"><span class="linenos">394</span></a> <span class="k">if</span> <span class="n">_sql_handler</span><span class="p">:</span> -</span><span id="L-395"><a href="#L-395"><span class="linenos">395</span></a> <span class="k">return</span> <span class="n">_sql_handler</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-396"><a href="#L-396"><span class="linenos">396</span></a> -</span><span id="L-397"><a href="#L-397"><span class="linenos">397</span></a> <span class="n">transforms_handler</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORMS</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">))</span> -</span><span id="L-398"><a href="#L-398"><span class="linenos">398</span></a> <span class="k">if</span> <span class="n">transforms_handler</span><span class="p">:</span> -</span><span id="L-399"><a href="#L-399"><span class="linenos">399</span></a> <span class="k">if</span> <span class="n">expression_type</span> <span class="ow">is</span> <span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-400"><a href="#L-400"><span class="linenos">400</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Func</span><span class="p">):</span> -</span><span id="L-401"><a href="#L-401"><span class="linenos">401</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">function_fallback_sql</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-385"><a href="#L-385"><span class="linenos">385</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-386"><a href="#L-386"><span class="linenos">386</span></a> <span class="n">full_outer_joins</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="L-387"><a href="#L-387"><span class="linenos">387</span></a> <span class="p">(</span><span class="n">index</span><span class="p">,</span> <span class="n">join</span><span class="p">)</span> +</span><span id="L-388"><a href="#L-388"><span class="linenos">388</span></a> <span class="k">for</span> <span class="n">index</span><span class="p">,</span> <span class="n">join</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[])</span> +</span><span id="L-389"><a href="#L-389"><span class="linenos">389</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">side</span> <span class="o">==</span> <span class="s2">"FULL"</span> <span class="ow">and</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="o">==</span> <span class="s2">"OUTER"</span> +</span><span id="L-390"><a href="#L-390"><span class="linenos">390</span></a> <span class="p">]</span> +</span><span id="L-391"><a href="#L-391"><span class="linenos">391</span></a> +</span><span id="L-392"><a href="#L-392"><span class="linenos">392</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">full_outer_joins</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-393"><a href="#L-393"><span class="linenos">393</span></a> <span class="n">expression_copy</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> +</span><span id="L-394"><a href="#L-394"><span class="linenos">394</span></a> <span class="n">index</span><span class="p">,</span> <span class="n">full_outer_join</span> <span class="o">=</span> <span class="n">full_outer_joins</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="L-395"><a href="#L-395"><span class="linenos">395</span></a> <span class="n">full_outer_join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"side"</span><span class="p">,</span> <span class="s2">"left"</span><span class="p">)</span> +</span><span id="L-396"><a href="#L-396"><span class="linenos">396</span></a> <span class="n">expression_copy</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"joins"</span><span class="p">][</span><span class="n">index</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"side"</span><span class="p">,</span> <span class="s2">"right"</span><span class="p">)</span> +</span><span id="L-397"><a href="#L-397"><span class="linenos">397</span></a> +</span><span id="L-398"><a href="#L-398"><span class="linenos">398</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">union</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression_copy</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-399"><a href="#L-399"><span class="linenos">399</span></a> +</span><span id="L-400"><a href="#L-400"><span class="linenos">400</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-401"><a href="#L-401"><span class="linenos">401</span></a> </span><span id="L-402"><a href="#L-402"><span class="linenos">402</span></a> -</span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a> <span class="c1"># Ensures we don't enter an infinite loop. This can happen when the original expression</span> -</span><span id="L-404"><a href="#L-404"><span class="linenos">404</span></a> <span class="c1"># has the same type as the final expression and there's no _sql method available for it,</span> -</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a> <span class="c1"># because then it'd re-enter _to_sql.</span> -</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> -</span><span id="L-407"><a href="#L-407"><span class="linenos">407</span></a> <span class="sa">f</span><span class="s2">"Expression type </span><span class="si">{</span><span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2"> requires a _sql method in order to be transformed."</span> -</span><span id="L-408"><a href="#L-408"><span class="linenos">408</span></a> <span class="p">)</span> +</span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a><span class="k">def</span> <span class="nf">move_ctes_to_top_level</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="L-404"><a href="#L-404"><span class="linenos">404</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a><span class="sd"> Some dialects (e.g. Hive, T-SQL, Spark prior to version 3) only allow CTEs to be</span> +</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a><span class="sd"> defined at the top-level, so for example queries like:</span> +</span><span id="L-407"><a href="#L-407"><span class="linenos">407</span></a> +</span><span id="L-408"><a href="#L-408"><span class="linenos">408</span></a><span class="sd"> SELECT * FROM (WITH t(c) AS (SELECT 1) SELECT * FROM t) AS subq</span> </span><span id="L-409"><a href="#L-409"><span class="linenos">409</span></a> -</span><span id="L-410"><a href="#L-410"><span class="linenos">410</span></a> <span class="k">return</span> <span class="n">transforms_handler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">)</span> -</span><span id="L-411"><a href="#L-411"><span class="linenos">411</span></a> -</span><span id="L-412"><a href="#L-412"><span class="linenos">412</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unsupported expression type </span><span class="si">{</span><span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2">."</span><span class="p">)</span> -</span><span id="L-413"><a href="#L-413"><span class="linenos">413</span></a> -</span><span id="L-414"><a href="#L-414"><span class="linenos">414</span></a> <span class="k">return</span> <span class="n">_to_sql</span> +</span><span id="L-410"><a href="#L-410"><span class="linenos">410</span></a><span class="sd"> are invalid in those dialects. This transformation can be used to ensure all CTEs are</span> +</span><span id="L-411"><a href="#L-411"><span class="linenos">411</span></a><span class="sd"> moved to the top level so that the final SQL code is valid from a syntax standpoint.</span> +</span><span id="L-412"><a href="#L-412"><span class="linenos">412</span></a> +</span><span id="L-413"><a href="#L-413"><span class="linenos">413</span></a><span class="sd"> TODO: handle name clashes whilst moving CTEs (it can get quite tricky & costly).</span> +</span><span id="L-414"><a href="#L-414"><span class="linenos">414</span></a><span class="sd"> """</span> +</span><span id="L-415"><a href="#L-415"><span class="linenos">415</span></a> <span class="n">top_level_with</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span> +</span><span id="L-416"><a href="#L-416"><span class="linenos">416</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">):</span> +</span><span id="L-417"><a href="#L-417"><span class="linenos">417</span></a> <span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">parent</span> <span class="ow">is</span> <span class="n">expression</span><span class="p">:</span> +</span><span id="L-418"><a href="#L-418"><span class="linenos">418</span></a> <span class="k">continue</span> +</span><span id="L-419"><a href="#L-419"><span class="linenos">419</span></a> +</span><span id="L-420"><a href="#L-420"><span class="linenos">420</span></a> <span class="n">inner_with</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="L-421"><a href="#L-421"><span class="linenos">421</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">top_level_with</span><span class="p">:</span> +</span><span id="L-422"><a href="#L-422"><span class="linenos">422</span></a> <span class="n">top_level_with</span> <span class="o">=</span> <span class="n">inner_with</span> +</span><span id="L-423"><a href="#L-423"><span class="linenos">423</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">top_level_with</span><span class="p">)</span> +</span><span id="L-424"><a href="#L-424"><span class="linenos">424</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-425"><a href="#L-425"><span class="linenos">425</span></a> <span class="k">if</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span> +</span><span id="L-426"><a href="#L-426"><span class="linenos">426</span></a> <span class="n">top_level_with</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"recursive"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span> +</span><span id="L-427"><a href="#L-427"><span class="linenos">427</span></a> +</span><span id="L-428"><a href="#L-428"><span class="linenos">428</span></a> <span class="n">top_level_with</span><span class="o">.</span><span class="n">expressions</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">inner_with</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> +</span><span id="L-429"><a href="#L-429"><span class="linenos">429</span></a> +</span><span id="L-430"><a href="#L-430"><span class="linenos">430</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-431"><a href="#L-431"><span class="linenos">431</span></a> +</span><span id="L-432"><a href="#L-432"><span class="linenos">432</span></a> +</span><span id="L-433"><a href="#L-433"><span class="linenos">433</span></a><span class="k">def</span> <span class="nf">preprocess</span><span class="p">(</span> +</span><span id="L-434"><a href="#L-434"><span class="linenos">434</span></a> <span class="n">transforms</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]],</span> +</span><span id="L-435"><a href="#L-435"><span class="linenos">435</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">Generator</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="nb">str</span><span class="p">]:</span> +</span><span id="L-436"><a href="#L-436"><span class="linenos">436</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-437"><a href="#L-437"><span class="linenos">437</span></a><span class="sd"> Creates a new transform by chaining a sequence of transformations and converts the resulting</span> +</span><span id="L-438"><a href="#L-438"><span class="linenos">438</span></a><span class="sd"> expression to SQL, using either the "_sql" method corresponding to the resulting expression,</span> +</span><span id="L-439"><a href="#L-439"><span class="linenos">439</span></a><span class="sd"> or the appropriate `Generator.TRANSFORMS` function (when applicable -- see below).</span> +</span><span id="L-440"><a href="#L-440"><span class="linenos">440</span></a> +</span><span id="L-441"><a href="#L-441"><span class="linenos">441</span></a><span class="sd"> Args:</span> +</span><span id="L-442"><a href="#L-442"><span class="linenos">442</span></a><span class="sd"> transforms: sequence of transform functions. These will be called in order.</span> +</span><span id="L-443"><a href="#L-443"><span class="linenos">443</span></a> +</span><span id="L-444"><a href="#L-444"><span class="linenos">444</span></a><span class="sd"> Returns:</span> +</span><span id="L-445"><a href="#L-445"><span class="linenos">445</span></a><span class="sd"> Function that can be used as a generator transform.</span> +</span><span id="L-446"><a href="#L-446"><span class="linenos">446</span></a><span class="sd"> """</span> +</span><span id="L-447"><a href="#L-447"><span class="linenos">447</span></a> +</span><span id="L-448"><a href="#L-448"><span class="linenos">448</span></a> <span class="k">def</span> <span class="nf">_to_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> +</span><span id="L-449"><a href="#L-449"><span class="linenos">449</span></a> <span class="n">expression_type</span> <span class="o">=</span> <span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-450"><a href="#L-450"><span class="linenos">450</span></a> +</span><span id="L-451"><a href="#L-451"><span class="linenos">451</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">transforms</span><span class="p">[</span><span class="mi">0</span><span class="p">](</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-452"><a href="#L-452"><span class="linenos">452</span></a> <span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="n">transforms</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span> +</span><span id="L-453"><a href="#L-453"><span class="linenos">453</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">t</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-454"><a href="#L-454"><span class="linenos">454</span></a> +</span><span id="L-455"><a href="#L-455"><span class="linenos">455</span></a> <span class="n">_sql_handler</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">key</span> <span class="o">+</span> <span class="s2">"_sql"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="L-456"><a href="#L-456"><span class="linenos">456</span></a> <span class="k">if</span> <span class="n">_sql_handler</span><span class="p">:</span> +</span><span id="L-457"><a href="#L-457"><span class="linenos">457</span></a> <span class="k">return</span> <span class="n">_sql_handler</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-458"><a href="#L-458"><span class="linenos">458</span></a> +</span><span id="L-459"><a href="#L-459"><span class="linenos">459</span></a> <span class="n">transforms_handler</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORMS</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">))</span> +</span><span id="L-460"><a href="#L-460"><span class="linenos">460</span></a> <span class="k">if</span> <span class="n">transforms_handler</span><span class="p">:</span> +</span><span id="L-461"><a href="#L-461"><span class="linenos">461</span></a> <span class="k">if</span> <span class="n">expression_type</span> <span class="ow">is</span> <span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-462"><a href="#L-462"><span class="linenos">462</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Func</span><span class="p">):</span> +</span><span id="L-463"><a href="#L-463"><span class="linenos">463</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">function_fallback_sql</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-464"><a href="#L-464"><span class="linenos">464</span></a> +</span><span id="L-465"><a href="#L-465"><span class="linenos">465</span></a> <span class="c1"># Ensures we don't enter an infinite loop. This can happen when the original expression</span> +</span><span id="L-466"><a href="#L-466"><span class="linenos">466</span></a> <span class="c1"># has the same type as the final expression and there's no _sql method available for it,</span> +</span><span id="L-467"><a href="#L-467"><span class="linenos">467</span></a> <span class="c1"># because then it'd re-enter _to_sql.</span> +</span><span id="L-468"><a href="#L-468"><span class="linenos">468</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> +</span><span id="L-469"><a href="#L-469"><span class="linenos">469</span></a> <span class="sa">f</span><span class="s2">"Expression type </span><span class="si">{</span><span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2"> requires a _sql method in order to be transformed."</span> +</span><span id="L-470"><a href="#L-470"><span class="linenos">470</span></a> <span class="p">)</span> +</span><span id="L-471"><a href="#L-471"><span class="linenos">471</span></a> +</span><span id="L-472"><a href="#L-472"><span class="linenos">472</span></a> <span class="k">return</span> <span class="n">transforms_handler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">)</span> +</span><span id="L-473"><a href="#L-473"><span class="linenos">473</span></a> +</span><span id="L-474"><a href="#L-474"><span class="linenos">474</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unsupported expression type </span><span class="si">{</span><span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2">."</span><span class="p">)</span> +</span><span id="L-475"><a href="#L-475"><span class="linenos">475</span></a> +</span><span id="L-476"><a href="#L-476"><span class="linenos">476</span></a> <span class="k">return</span> <span class="n">_to_sql</span> </span></pre></div> @@ -619,7 +687,7 @@ </span><span id="eliminate_distinct_on-68"><a href="#eliminate_distinct_on-68"><span class="linenos">68</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">)</span> </span><span id="eliminate_distinct_on-69"><a href="#eliminate_distinct_on-69"><span class="linenos">69</span></a> </span><span id="eliminate_distinct_on-70"><a href="#eliminate_distinct_on-70"><span class="linenos">70</span></a> <span class="k">if</span> <span class="n">order</span><span class="p">:</span> -</span><span id="eliminate_distinct_on-71"><a href="#eliminate_distinct_on-71"><span class="linenos">71</span></a> <span class="n">window</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">order</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> +</span><span id="eliminate_distinct_on-71"><a href="#eliminate_distinct_on-71"><span class="linenos">71</span></a> <span class="n">window</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">order</span><span class="o">.</span><span class="n">pop</span><span class="p">())</span> </span><span id="eliminate_distinct_on-72"><a href="#eliminate_distinct_on-72"><span class="linenos">72</span></a> <span class="k">else</span><span class="p">:</span> </span><span id="eliminate_distinct_on-73"><a href="#eliminate_distinct_on-73"><span class="linenos">73</span></a> <span class="n">window</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">c</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">distinct_cols</span><span class="p">]))</span> </span><span id="eliminate_distinct_on-74"><a href="#eliminate_distinct_on-74"><span class="linenos">74</span></a> @@ -627,9 +695,9 @@ </span><span id="eliminate_distinct_on-76"><a href="#eliminate_distinct_on-76"><span class="linenos">76</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">window</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> </span><span id="eliminate_distinct_on-77"><a href="#eliminate_distinct_on-77"><span class="linenos">77</span></a> </span><span id="eliminate_distinct_on-78"><a href="#eliminate_distinct_on-78"><span class="linenos">78</span></a> <span class="k">return</span> <span class="p">(</span> -</span><span id="eliminate_distinct_on-79"><a href="#eliminate_distinct_on-79"><span class="linenos">79</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">outer_selects</span><span class="p">)</span> -</span><span id="eliminate_distinct_on-80"><a href="#eliminate_distinct_on-80"><span class="linenos">80</span></a> <span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="s2">"_t"</span><span class="p">))</span> -</span><span id="eliminate_distinct_on-81"><a href="#eliminate_distinct_on-81"><span class="linenos">81</span></a> <span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">row_number</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="mi">1</span><span class="p">))</span> +</span><span id="eliminate_distinct_on-79"><a href="#eliminate_distinct_on-79"><span class="linenos">79</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">outer_selects</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="eliminate_distinct_on-80"><a href="#eliminate_distinct_on-80"><span class="linenos">80</span></a> <span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="s2">"_t"</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="eliminate_distinct_on-81"><a href="#eliminate_distinct_on-81"><span class="linenos">81</span></a> <span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">row_number</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> </span><span id="eliminate_distinct_on-82"><a href="#eliminate_distinct_on-82"><span class="linenos">82</span></a> <span class="p">)</span> </span><span id="eliminate_distinct_on-83"><a href="#eliminate_distinct_on-83"><span class="linenos">83</span></a> </span><span id="eliminate_distinct_on-84"><a href="#eliminate_distinct_on-84"><span class="linenos">84</span></a> <span class="k">return</span> <span class="n">expression</span> @@ -703,9 +771,11 @@ </span><span id="eliminate_qualify-121"><a href="#eliminate_qualify-121"><span class="linenos">121</span></a> <span class="k">elif</span> <span class="n">expr</span><span class="o">.</span><span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">:</span> </span><span id="eliminate_qualify-122"><a href="#eliminate_qualify-122"><span class="linenos">122</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">expr</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> </span><span id="eliminate_qualify-123"><a href="#eliminate_qualify-123"><span class="linenos">123</span></a> -</span><span id="eliminate_qualify-124"><a href="#eliminate_qualify-124"><span class="linenos">124</span></a> <span class="k">return</span> <span class="n">outer_selects</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="n">alias</span><span class="o">=</span><span class="s2">"_t"</span><span class="p">))</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">qualify_filters</span><span class="p">)</span> -</span><span id="eliminate_qualify-125"><a href="#eliminate_qualify-125"><span class="linenos">125</span></a> -</span><span id="eliminate_qualify-126"><a href="#eliminate_qualify-126"><span class="linenos">126</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="eliminate_qualify-124"><a href="#eliminate_qualify-124"><span class="linenos">124</span></a> <span class="k">return</span> <span class="n">outer_selects</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="n">alias</span><span class="o">=</span><span class="s2">"_t"</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span><span class="o">.</span><span class="n">where</span><span class="p">(</span> +</span><span id="eliminate_qualify-125"><a href="#eliminate_qualify-125"><span class="linenos">125</span></a> <span class="n">qualify_filters</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span> +</span><span id="eliminate_qualify-126"><a href="#eliminate_qualify-126"><span class="linenos">126</span></a> <span class="p">)</span> +</span><span id="eliminate_qualify-127"><a href="#eliminate_qualify-127"><span class="linenos">127</span></a> +</span><span id="eliminate_qualify-128"><a href="#eliminate_qualify-128"><span class="linenos">128</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -733,17 +803,17 @@ otherwise we won't be able to refer to it in the outer query's WHERE clause.</p> </div> <a class="headerlink" href="#remove_precision_parameterized_types"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="remove_precision_parameterized_types-129"><a href="#remove_precision_parameterized_types-129"><span class="linenos">129</span></a><span class="k">def</span> <span class="nf">remove_precision_parameterized_types</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="remove_precision_parameterized_types-130"><a href="#remove_precision_parameterized_types-130"><span class="linenos">130</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="remove_precision_parameterized_types-131"><a href="#remove_precision_parameterized_types-131"><span class="linenos">131</span></a><span class="sd"> Some dialects only allow the precision for parameterized types to be defined in the DDL and not in</span> -</span><span id="remove_precision_parameterized_types-132"><a href="#remove_precision_parameterized_types-132"><span class="linenos">132</span></a><span class="sd"> other expressions. This transforms removes the precision from parameterized types in expressions.</span> -</span><span id="remove_precision_parameterized_types-133"><a href="#remove_precision_parameterized_types-133"><span class="linenos">133</span></a><span class="sd"> """</span> -</span><span id="remove_precision_parameterized_types-134"><a href="#remove_precision_parameterized_types-134"><span class="linenos">134</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">):</span> -</span><span id="remove_precision_parameterized_types-135"><a href="#remove_precision_parameterized_types-135"><span class="linenos">135</span></a> <span class="n">node</span><span class="o">.</span><span class="n">set</span><span class="p">(</span> -</span><span id="remove_precision_parameterized_types-136"><a href="#remove_precision_parameterized_types-136"><span class="linenos">136</span></a> <span class="s2">"expressions"</span><span class="p">,</span> <span class="p">[</span><span class="n">e</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">expressions</span> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataTypeParam</span><span class="p">)]</span> -</span><span id="remove_precision_parameterized_types-137"><a href="#remove_precision_parameterized_types-137"><span class="linenos">137</span></a> <span class="p">)</span> -</span><span id="remove_precision_parameterized_types-138"><a href="#remove_precision_parameterized_types-138"><span class="linenos">138</span></a> -</span><span id="remove_precision_parameterized_types-139"><a href="#remove_precision_parameterized_types-139"><span class="linenos">139</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="remove_precision_parameterized_types-131"><a href="#remove_precision_parameterized_types-131"><span class="linenos">131</span></a><span class="k">def</span> <span class="nf">remove_precision_parameterized_types</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="remove_precision_parameterized_types-132"><a href="#remove_precision_parameterized_types-132"><span class="linenos">132</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="remove_precision_parameterized_types-133"><a href="#remove_precision_parameterized_types-133"><span class="linenos">133</span></a><span class="sd"> Some dialects only allow the precision for parameterized types to be defined in the DDL and not in</span> +</span><span id="remove_precision_parameterized_types-134"><a href="#remove_precision_parameterized_types-134"><span class="linenos">134</span></a><span class="sd"> other expressions. This transforms removes the precision from parameterized types in expressions.</span> +</span><span id="remove_precision_parameterized_types-135"><a href="#remove_precision_parameterized_types-135"><span class="linenos">135</span></a><span class="sd"> """</span> +</span><span id="remove_precision_parameterized_types-136"><a href="#remove_precision_parameterized_types-136"><span class="linenos">136</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">):</span> +</span><span id="remove_precision_parameterized_types-137"><a href="#remove_precision_parameterized_types-137"><span class="linenos">137</span></a> <span class="n">node</span><span class="o">.</span><span class="n">set</span><span class="p">(</span> +</span><span id="remove_precision_parameterized_types-138"><a href="#remove_precision_parameterized_types-138"><span class="linenos">138</span></a> <span class="s2">"expressions"</span><span class="p">,</span> <span class="p">[</span><span class="n">e</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">expressions</span> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataTypeParam</span><span class="p">)]</span> +</span><span id="remove_precision_parameterized_types-139"><a href="#remove_precision_parameterized_types-139"><span class="linenos">139</span></a> <span class="p">)</span> +</span><span id="remove_precision_parameterized_types-140"><a href="#remove_precision_parameterized_types-140"><span class="linenos">140</span></a> +</span><span id="remove_precision_parameterized_types-141"><a href="#remove_precision_parameterized_types-141"><span class="linenos">141</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -764,29 +834,29 @@ other expressions. This transforms removes the precision from parameterized type </div> <a class="headerlink" href="#unnest_to_explode"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="unnest_to_explode-142"><a href="#unnest_to_explode-142"><span class="linenos">142</span></a><span class="k">def</span> <span class="nf">unnest_to_explode</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="unnest_to_explode-143"><a href="#unnest_to_explode-143"><span class="linenos">143</span></a><span class="w"> </span><span class="sd">"""Convert cross join unnest into lateral view explode (used in presto -> hive)."""</span> -</span><span id="unnest_to_explode-144"><a href="#unnest_to_explode-144"><span class="linenos">144</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="unnest_to_explode-145"><a href="#unnest_to_explode-145"><span class="linenos">145</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> -</span><span id="unnest_to_explode-146"><a href="#unnest_to_explode-146"><span class="linenos">146</span></a> <span class="n">unnest</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span> -</span><span id="unnest_to_explode-147"><a href="#unnest_to_explode-147"><span class="linenos">147</span></a> -</span><span id="unnest_to_explode-148"><a href="#unnest_to_explode-148"><span class="linenos">148</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">):</span> -</span><span id="unnest_to_explode-149"><a href="#unnest_to_explode-149"><span class="linenos">149</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> -</span><span id="unnest_to_explode-150"><a href="#unnest_to_explode-150"><span class="linenos">150</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Posexplode</span> <span class="k">if</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"offset"</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">Explode</span> -</span><span id="unnest_to_explode-151"><a href="#unnest_to_explode-151"><span class="linenos">151</span></a> -</span><span id="unnest_to_explode-152"><a href="#unnest_to_explode-152"><span class="linenos">152</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"joins"</span><span class="p">]</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">join</span><span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="unnest_to_explode-144"><a href="#unnest_to_explode-144"><span class="linenos">144</span></a><span class="k">def</span> <span class="nf">unnest_to_explode</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="unnest_to_explode-145"><a href="#unnest_to_explode-145"><span class="linenos">145</span></a><span class="w"> </span><span class="sd">"""Convert cross join unnest into lateral view explode (used in presto -> hive)."""</span> +</span><span id="unnest_to_explode-146"><a href="#unnest_to_explode-146"><span class="linenos">146</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="unnest_to_explode-147"><a href="#unnest_to_explode-147"><span class="linenos">147</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> +</span><span id="unnest_to_explode-148"><a href="#unnest_to_explode-148"><span class="linenos">148</span></a> <span class="n">unnest</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span> +</span><span id="unnest_to_explode-149"><a href="#unnest_to_explode-149"><span class="linenos">149</span></a> +</span><span id="unnest_to_explode-150"><a href="#unnest_to_explode-150"><span class="linenos">150</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnest</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">):</span> +</span><span id="unnest_to_explode-151"><a href="#unnest_to_explode-151"><span class="linenos">151</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> +</span><span id="unnest_to_explode-152"><a href="#unnest_to_explode-152"><span class="linenos">152</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Posexplode</span> <span class="k">if</span> <span class="n">unnest</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"offset"</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">Explode</span> </span><span id="unnest_to_explode-153"><a href="#unnest_to_explode-153"><span class="linenos">153</span></a> -</span><span id="unnest_to_explode-154"><a href="#unnest_to_explode-154"><span class="linenos">154</span></a> <span class="k">for</span> <span class="n">e</span><span class="p">,</span> <span class="n">column</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span><span class="p">,</span> <span class="n">alias</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">alias</span> <span class="k">else</span> <span class="p">[]):</span> -</span><span id="unnest_to_explode-155"><a href="#unnest_to_explode-155"><span class="linenos">155</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> -</span><span id="unnest_to_explode-156"><a href="#unnest_to_explode-156"><span class="linenos">156</span></a> <span class="s2">"laterals"</span><span class="p">,</span> -</span><span id="unnest_to_explode-157"><a href="#unnest_to_explode-157"><span class="linenos">157</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Lateral</span><span class="p">(</span> -</span><span id="unnest_to_explode-158"><a href="#unnest_to_explode-158"><span class="linenos">158</span></a> <span class="n">this</span><span class="o">=</span><span class="n">udtf</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">e</span><span class="p">),</span> -</span><span id="unnest_to_explode-159"><a href="#unnest_to_explode-159"><span class="linenos">159</span></a> <span class="n">view</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> -</span><span id="unnest_to_explode-160"><a href="#unnest_to_explode-160"><span class="linenos">160</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">alias</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">columns</span><span class="o">=</span><span class="p">[</span><span class="n">column</span><span class="p">]),</span> <span class="c1"># type: ignore</span> -</span><span id="unnest_to_explode-161"><a href="#unnest_to_explode-161"><span class="linenos">161</span></a> <span class="p">),</span> -</span><span id="unnest_to_explode-162"><a href="#unnest_to_explode-162"><span class="linenos">162</span></a> <span class="p">)</span> -</span><span id="unnest_to_explode-163"><a href="#unnest_to_explode-163"><span class="linenos">163</span></a> -</span><span id="unnest_to_explode-164"><a href="#unnest_to_explode-164"><span class="linenos">164</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="unnest_to_explode-154"><a href="#unnest_to_explode-154"><span class="linenos">154</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"joins"</span><span class="p">]</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">join</span><span class="p">)</span> +</span><span id="unnest_to_explode-155"><a href="#unnest_to_explode-155"><span class="linenos">155</span></a> +</span><span id="unnest_to_explode-156"><a href="#unnest_to_explode-156"><span class="linenos">156</span></a> <span class="k">for</span> <span class="n">e</span><span class="p">,</span> <span class="n">column</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">unnest</span><span class="o">.</span><span class="n">expressions</span><span class="p">,</span> <span class="n">alias</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">alias</span> <span class="k">else</span> <span class="p">[]):</span> +</span><span id="unnest_to_explode-157"><a href="#unnest_to_explode-157"><span class="linenos">157</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> +</span><span id="unnest_to_explode-158"><a href="#unnest_to_explode-158"><span class="linenos">158</span></a> <span class="s2">"laterals"</span><span class="p">,</span> +</span><span id="unnest_to_explode-159"><a href="#unnest_to_explode-159"><span class="linenos">159</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Lateral</span><span class="p">(</span> +</span><span id="unnest_to_explode-160"><a href="#unnest_to_explode-160"><span class="linenos">160</span></a> <span class="n">this</span><span class="o">=</span><span class="n">udtf</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">e</span><span class="p">),</span> +</span><span id="unnest_to_explode-161"><a href="#unnest_to_explode-161"><span class="linenos">161</span></a> <span class="n">view</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> +</span><span id="unnest_to_explode-162"><a href="#unnest_to_explode-162"><span class="linenos">162</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">alias</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">columns</span><span class="o">=</span><span class="p">[</span><span class="n">column</span><span class="p">]),</span> <span class="c1"># type: ignore</span> +</span><span id="unnest_to_explode-163"><a href="#unnest_to_explode-163"><span class="linenos">163</span></a> <span class="p">),</span> +</span><span id="unnest_to_explode-164"><a href="#unnest_to_explode-164"><span class="linenos">164</span></a> <span class="p">)</span> +</span><span id="unnest_to_explode-165"><a href="#unnest_to_explode-165"><span class="linenos">165</span></a> +</span><span id="unnest_to_explode-166"><a href="#unnest_to_explode-166"><span class="linenos">166</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -806,138 +876,141 @@ other expressions. This transforms removes the precision from parameterized type </div> <a class="headerlink" href="#explode_to_unnest"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="explode_to_unnest-167"><a href="#explode_to_unnest-167"><span class="linenos">167</span></a><span class="k">def</span> <span class="nf">explode_to_unnest</span><span class="p">(</span><span class="n">index_offset</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">0</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span> -</span><span id="explode_to_unnest-168"><a href="#explode_to_unnest-168"><span class="linenos">168</span></a> <span class="k">def</span> <span class="nf">_explode_to_unnest</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="explode_to_unnest-169"><a href="#explode_to_unnest-169"><span class="linenos">169</span></a><span class="w"> </span><span class="sd">"""Convert explode/posexplode into unnest (used in hive -> presto)."""</span> -</span><span id="explode_to_unnest-170"><a href="#explode_to_unnest-170"><span class="linenos">170</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="explode_to_unnest-171"><a href="#explode_to_unnest-171"><span class="linenos">171</span></a> <span class="kn">from</span> <span class="nn">sqlglot.optimizer.scope</span> <span class="kn">import</span> <span class="n">Scope</span> -</span><span id="explode_to_unnest-172"><a href="#explode_to_unnest-172"><span class="linenos">172</span></a> -</span><span id="explode_to_unnest-173"><a href="#explode_to_unnest-173"><span class="linenos">173</span></a> <span class="n">taken_select_names</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">)</span> -</span><span id="explode_to_unnest-174"><a href="#explode_to_unnest-174"><span class="linenos">174</span></a> <span class="n">taken_source_names</span> <span class="o">=</span> <span class="p">{</span><span class="n">name</span> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">_</span> <span class="ow">in</span> <span class="n">Scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span><span class="o">.</span><span class="n">references</span><span class="p">}</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="explode_to_unnest-169"><a href="#explode_to_unnest-169"><span class="linenos">169</span></a><span class="k">def</span> <span class="nf">explode_to_unnest</span><span class="p">(</span><span class="n">index_offset</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">0</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]:</span> +</span><span id="explode_to_unnest-170"><a href="#explode_to_unnest-170"><span class="linenos">170</span></a><span class="w"> </span><span class="sd">"""Convert explode/posexplode into unnest (used in hive -> presto)."""</span> +</span><span id="explode_to_unnest-171"><a href="#explode_to_unnest-171"><span class="linenos">171</span></a> +</span><span id="explode_to_unnest-172"><a href="#explode_to_unnest-172"><span class="linenos">172</span></a> <span class="k">def</span> <span class="nf">_explode_to_unnest</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="explode_to_unnest-173"><a href="#explode_to_unnest-173"><span class="linenos">173</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="explode_to_unnest-174"><a href="#explode_to_unnest-174"><span class="linenos">174</span></a> <span class="kn">from</span> <span class="nn">sqlglot.optimizer.scope</span> <span class="kn">import</span> <span class="n">Scope</span> </span><span id="explode_to_unnest-175"><a href="#explode_to_unnest-175"><span class="linenos">175</span></a> -</span><span id="explode_to_unnest-176"><a href="#explode_to_unnest-176"><span class="linenos">176</span></a> <span class="k">def</span> <span class="nf">new_name</span><span class="p">(</span><span class="n">names</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> -</span><span id="explode_to_unnest-177"><a href="#explode_to_unnest-177"><span class="linenos">177</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">names</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> -</span><span id="explode_to_unnest-178"><a href="#explode_to_unnest-178"><span class="linenos">178</span></a> <span class="n">names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> -</span><span id="explode_to_unnest-179"><a href="#explode_to_unnest-179"><span class="linenos">179</span></a> <span class="k">return</span> <span class="n">name</span> -</span><span id="explode_to_unnest-180"><a href="#explode_to_unnest-180"><span class="linenos">180</span></a> -</span><span id="explode_to_unnest-181"><a href="#explode_to_unnest-181"><span class="linenos">181</span></a> <span class="n">arrays</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">]</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="explode_to_unnest-182"><a href="#explode_to_unnest-182"><span class="linenos">182</span></a> <span class="n">series_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span> -</span><span id="explode_to_unnest-183"><a href="#explode_to_unnest-183"><span class="linenos">183</span></a> <span class="n">series</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span> -</span><span id="explode_to_unnest-184"><a href="#explode_to_unnest-184"><span class="linenos">184</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span> -</span><span id="explode_to_unnest-185"><a href="#explode_to_unnest-185"><span class="linenos">185</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">GenerateSeries</span><span class="p">(</span><span class="n">start</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">index_offset</span><span class="p">))]</span> -</span><span id="explode_to_unnest-186"><a href="#explode_to_unnest-186"><span class="linenos">186</span></a> <span class="p">),</span> -</span><span id="explode_to_unnest-187"><a href="#explode_to_unnest-187"><span class="linenos">187</span></a> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_source_names</span><span class="p">,</span> <span class="s2">"_u"</span><span class="p">),</span> -</span><span id="explode_to_unnest-188"><a href="#explode_to_unnest-188"><span class="linenos">188</span></a> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">series_alias</span><span class="p">],</span> -</span><span id="explode_to_unnest-189"><a href="#explode_to_unnest-189"><span class="linenos">189</span></a> <span class="p">)</span> -</span><span id="explode_to_unnest-190"><a href="#explode_to_unnest-190"><span class="linenos">190</span></a> -</span><span id="explode_to_unnest-191"><a href="#explode_to_unnest-191"><span class="linenos">191</span></a> <span class="c1"># we use list here because expression.selects is mutated inside the loop</span> -</span><span id="explode_to_unnest-192"><a href="#explode_to_unnest-192"><span class="linenos">192</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="o">.</span><span class="n">copy</span><span class="p">():</span> -</span><span id="explode_to_unnest-193"><a href="#explode_to_unnest-193"><span class="linenos">193</span></a> <span class="n">explode</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Explode</span><span class="p">)</span> -</span><span id="explode_to_unnest-194"><a href="#explode_to_unnest-194"><span class="linenos">194</span></a> -</span><span id="explode_to_unnest-195"><a href="#explode_to_unnest-195"><span class="linenos">195</span></a> <span class="k">if</span> <span class="n">explode</span><span class="p">:</span> -</span><span id="explode_to_unnest-196"><a href="#explode_to_unnest-196"><span class="linenos">196</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="s2">""</span> -</span><span id="explode_to_unnest-197"><a href="#explode_to_unnest-197"><span class="linenos">197</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="s2">""</span> -</span><span id="explode_to_unnest-198"><a href="#explode_to_unnest-198"><span class="linenos">198</span></a> -</span><span id="explode_to_unnest-199"><a href="#explode_to_unnest-199"><span class="linenos">199</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> -</span><span id="explode_to_unnest-200"><a href="#explode_to_unnest-200"><span class="linenos">200</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">alias</span> -</span><span id="explode_to_unnest-201"><a href="#explode_to_unnest-201"><span class="linenos">201</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span> -</span><span id="explode_to_unnest-202"><a href="#explode_to_unnest-202"><span class="linenos">202</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Aliases</span><span class="p">):</span> -</span><span id="explode_to_unnest-203"><a href="#explode_to_unnest-203"><span class="linenos">203</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">aliases</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">name</span> -</span><span id="explode_to_unnest-204"><a href="#explode_to_unnest-204"><span class="linenos">204</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">aliases</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">name</span> -</span><span id="explode_to_unnest-205"><a href="#explode_to_unnest-205"><span class="linenos">205</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="s2">""</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span> -</span><span id="explode_to_unnest-206"><a href="#explode_to_unnest-206"><span class="linenos">206</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="explode_to_unnest-207"><a href="#explode_to_unnest-207"><span class="linenos">207</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="s2">""</span><span class="p">))</span> -</span><span id="explode_to_unnest-208"><a href="#explode_to_unnest-208"><span class="linenos">208</span></a> <span class="n">explode</span> <span class="o">=</span> <span class="n">alias</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Explode</span><span class="p">)</span> -</span><span id="explode_to_unnest-209"><a href="#explode_to_unnest-209"><span class="linenos">209</span></a> <span class="k">assert</span> <span class="n">explode</span> -</span><span id="explode_to_unnest-210"><a href="#explode_to_unnest-210"><span class="linenos">210</span></a> -</span><span id="explode_to_unnest-211"><a href="#explode_to_unnest-211"><span class="linenos">211</span></a> <span class="n">is_posexplode</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Posexplode</span><span class="p">)</span> -</span><span id="explode_to_unnest-212"><a href="#explode_to_unnest-212"><span class="linenos">212</span></a> <span class="n">explode_arg</span> <span class="o">=</span> <span class="n">explode</span><span class="o">.</span><span class="n">this</span> +</span><span id="explode_to_unnest-176"><a href="#explode_to_unnest-176"><span class="linenos">176</span></a> <span class="n">taken_select_names</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">)</span> +</span><span id="explode_to_unnest-177"><a href="#explode_to_unnest-177"><span class="linenos">177</span></a> <span class="n">taken_source_names</span> <span class="o">=</span> <span class="p">{</span><span class="n">name</span> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">_</span> <span class="ow">in</span> <span class="n">Scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span><span class="o">.</span><span class="n">references</span><span class="p">}</span> +</span><span id="explode_to_unnest-178"><a href="#explode_to_unnest-178"><span class="linenos">178</span></a> +</span><span id="explode_to_unnest-179"><a href="#explode_to_unnest-179"><span class="linenos">179</span></a> <span class="k">def</span> <span class="nf">new_name</span><span class="p">(</span><span class="n">names</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> +</span><span id="explode_to_unnest-180"><a href="#explode_to_unnest-180"><span class="linenos">180</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">names</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> +</span><span id="explode_to_unnest-181"><a href="#explode_to_unnest-181"><span class="linenos">181</span></a> <span class="n">names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> +</span><span id="explode_to_unnest-182"><a href="#explode_to_unnest-182"><span class="linenos">182</span></a> <span class="k">return</span> <span class="n">name</span> +</span><span id="explode_to_unnest-183"><a href="#explode_to_unnest-183"><span class="linenos">183</span></a> +</span><span id="explode_to_unnest-184"><a href="#explode_to_unnest-184"><span class="linenos">184</span></a> <span class="n">arrays</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">]</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="explode_to_unnest-185"><a href="#explode_to_unnest-185"><span class="linenos">185</span></a> <span class="n">series_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span> +</span><span id="explode_to_unnest-186"><a href="#explode_to_unnest-186"><span class="linenos">186</span></a> <span class="n">series</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span> +</span><span id="explode_to_unnest-187"><a href="#explode_to_unnest-187"><span class="linenos">187</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span> +</span><span id="explode_to_unnest-188"><a href="#explode_to_unnest-188"><span class="linenos">188</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">GenerateSeries</span><span class="p">(</span><span class="n">start</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">index_offset</span><span class="p">))]</span> +</span><span id="explode_to_unnest-189"><a href="#explode_to_unnest-189"><span class="linenos">189</span></a> <span class="p">),</span> +</span><span id="explode_to_unnest-190"><a href="#explode_to_unnest-190"><span class="linenos">190</span></a> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_source_names</span><span class="p">,</span> <span class="s2">"_u"</span><span class="p">),</span> +</span><span id="explode_to_unnest-191"><a href="#explode_to_unnest-191"><span class="linenos">191</span></a> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">series_alias</span><span class="p">],</span> +</span><span id="explode_to_unnest-192"><a href="#explode_to_unnest-192"><span class="linenos">192</span></a> <span class="p">)</span> +</span><span id="explode_to_unnest-193"><a href="#explode_to_unnest-193"><span class="linenos">193</span></a> +</span><span id="explode_to_unnest-194"><a href="#explode_to_unnest-194"><span class="linenos">194</span></a> <span class="c1"># we use list here because expression.selects is mutated inside the loop</span> +</span><span id="explode_to_unnest-195"><a href="#explode_to_unnest-195"><span class="linenos">195</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span> +</span><span id="explode_to_unnest-196"><a href="#explode_to_unnest-196"><span class="linenos">196</span></a> <span class="n">explode</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Explode</span><span class="p">)</span> +</span><span id="explode_to_unnest-197"><a href="#explode_to_unnest-197"><span class="linenos">197</span></a> +</span><span id="explode_to_unnest-198"><a href="#explode_to_unnest-198"><span class="linenos">198</span></a> <span class="k">if</span> <span class="n">explode</span><span class="p">:</span> +</span><span id="explode_to_unnest-199"><a href="#explode_to_unnest-199"><span class="linenos">199</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="s2">""</span> +</span><span id="explode_to_unnest-200"><a href="#explode_to_unnest-200"><span class="linenos">200</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="s2">""</span> +</span><span id="explode_to_unnest-201"><a href="#explode_to_unnest-201"><span class="linenos">201</span></a> +</span><span id="explode_to_unnest-202"><a href="#explode_to_unnest-202"><span class="linenos">202</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> +</span><span id="explode_to_unnest-203"><a href="#explode_to_unnest-203"><span class="linenos">203</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">alias</span> +</span><span id="explode_to_unnest-204"><a href="#explode_to_unnest-204"><span class="linenos">204</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span> +</span><span id="explode_to_unnest-205"><a href="#explode_to_unnest-205"><span class="linenos">205</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Aliases</span><span class="p">):</span> +</span><span id="explode_to_unnest-206"><a href="#explode_to_unnest-206"><span class="linenos">206</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">aliases</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">name</span> +</span><span id="explode_to_unnest-207"><a href="#explode_to_unnest-207"><span class="linenos">207</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">aliases</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">name</span> +</span><span id="explode_to_unnest-208"><a href="#explode_to_unnest-208"><span class="linenos">208</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="s2">""</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span> +</span><span id="explode_to_unnest-209"><a href="#explode_to_unnest-209"><span class="linenos">209</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="explode_to_unnest-210"><a href="#explode_to_unnest-210"><span class="linenos">210</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="s2">""</span><span class="p">))</span> +</span><span id="explode_to_unnest-211"><a href="#explode_to_unnest-211"><span class="linenos">211</span></a> <span class="n">explode</span> <span class="o">=</span> <span class="n">alias</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Explode</span><span class="p">)</span> +</span><span id="explode_to_unnest-212"><a href="#explode_to_unnest-212"><span class="linenos">212</span></a> <span class="k">assert</span> <span class="n">explode</span> </span><span id="explode_to_unnest-213"><a href="#explode_to_unnest-213"><span class="linenos">213</span></a> -</span><span id="explode_to_unnest-214"><a href="#explode_to_unnest-214"><span class="linenos">214</span></a> <span class="c1"># This ensures that we won't use [POS]EXPLODE's argument as a new selection</span> -</span><span id="explode_to_unnest-215"><a href="#explode_to_unnest-215"><span class="linenos">215</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode_arg</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> -</span><span id="explode_to_unnest-216"><a href="#explode_to_unnest-216"><span class="linenos">216</span></a> <span class="n">taken_select_names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">output_name</span><span class="p">)</span> -</span><span id="explode_to_unnest-217"><a href="#explode_to_unnest-217"><span class="linenos">217</span></a> -</span><span id="explode_to_unnest-218"><a href="#explode_to_unnest-218"><span class="linenos">218</span></a> <span class="n">unnest_source_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_source_names</span><span class="p">,</span> <span class="s2">"_u"</span><span class="p">)</span> -</span><span id="explode_to_unnest-219"><a href="#explode_to_unnest-219"><span class="linenos">219</span></a> -</span><span id="explode_to_unnest-220"><a href="#explode_to_unnest-220"><span class="linenos">220</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">explode_alias</span><span class="p">:</span> -</span><span id="explode_to_unnest-221"><a href="#explode_to_unnest-221"><span class="linenos">221</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"col"</span><span class="p">)</span> +</span><span id="explode_to_unnest-214"><a href="#explode_to_unnest-214"><span class="linenos">214</span></a> <span class="n">is_posexplode</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Posexplode</span><span class="p">)</span> +</span><span id="explode_to_unnest-215"><a href="#explode_to_unnest-215"><span class="linenos">215</span></a> <span class="n">explode_arg</span> <span class="o">=</span> <span class="n">explode</span><span class="o">.</span><span class="n">this</span> +</span><span id="explode_to_unnest-216"><a href="#explode_to_unnest-216"><span class="linenos">216</span></a> +</span><span id="explode_to_unnest-217"><a href="#explode_to_unnest-217"><span class="linenos">217</span></a> <span class="c1"># This ensures that we won't use [POS]EXPLODE's argument as a new selection</span> +</span><span id="explode_to_unnest-218"><a href="#explode_to_unnest-218"><span class="linenos">218</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">explode_arg</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> +</span><span id="explode_to_unnest-219"><a href="#explode_to_unnest-219"><span class="linenos">219</span></a> <span class="n">taken_select_names</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">output_name</span><span class="p">)</span> +</span><span id="explode_to_unnest-220"><a href="#explode_to_unnest-220"><span class="linenos">220</span></a> +</span><span id="explode_to_unnest-221"><a href="#explode_to_unnest-221"><span class="linenos">221</span></a> <span class="n">unnest_source_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_source_names</span><span class="p">,</span> <span class="s2">"_u"</span><span class="p">)</span> </span><span id="explode_to_unnest-222"><a href="#explode_to_unnest-222"><span class="linenos">222</span></a> -</span><span id="explode_to_unnest-223"><a href="#explode_to_unnest-223"><span class="linenos">223</span></a> <span class="k">if</span> <span class="n">is_posexplode</span><span class="p">:</span> -</span><span id="explode_to_unnest-224"><a href="#explode_to_unnest-224"><span class="linenos">224</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span> +</span><span id="explode_to_unnest-223"><a href="#explode_to_unnest-223"><span class="linenos">223</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">explode_alias</span><span class="p">:</span> +</span><span id="explode_to_unnest-224"><a href="#explode_to_unnest-224"><span class="linenos">224</span></a> <span class="n">explode_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"col"</span><span class="p">)</span> </span><span id="explode_to_unnest-225"><a href="#explode_to_unnest-225"><span class="linenos">225</span></a> -</span><span id="explode_to_unnest-226"><a href="#explode_to_unnest-226"><span class="linenos">226</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">pos_alias</span><span class="p">:</span> -</span><span id="explode_to_unnest-227"><a href="#explode_to_unnest-227"><span class="linenos">227</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span> +</span><span id="explode_to_unnest-226"><a href="#explode_to_unnest-226"><span class="linenos">226</span></a> <span class="k">if</span> <span class="n">is_posexplode</span><span class="p">:</span> +</span><span id="explode_to_unnest-227"><a href="#explode_to_unnest-227"><span class="linenos">227</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span> </span><span id="explode_to_unnest-228"><a href="#explode_to_unnest-228"><span class="linenos">228</span></a> -</span><span id="explode_to_unnest-229"><a href="#explode_to_unnest-229"><span class="linenos">229</span></a> <span class="n">alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">explode_alias</span><span class="p">))</span> -</span><span id="explode_to_unnest-230"><a href="#explode_to_unnest-230"><span class="linenos">230</span></a> -</span><span id="explode_to_unnest-231"><a href="#explode_to_unnest-231"><span class="linenos">231</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">If</span><span class="p">(</span> -</span><span id="explode_to_unnest-232"><a href="#explode_to_unnest-232"><span class="linenos">232</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">)),</span> -</span><span id="explode_to_unnest-233"><a href="#explode_to_unnest-233"><span class="linenos">233</span></a> <span class="n">true</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">explode_alias</span><span class="p">),</span> -</span><span id="explode_to_unnest-234"><a href="#explode_to_unnest-234"><span class="linenos">234</span></a> <span class="p">)</span> -</span><span id="explode_to_unnest-235"><a href="#explode_to_unnest-235"><span class="linenos">235</span></a> -</span><span id="explode_to_unnest-236"><a href="#explode_to_unnest-236"><span class="linenos">236</span></a> <span class="n">explode</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> -</span><span id="explode_to_unnest-237"><a href="#explode_to_unnest-237"><span class="linenos">237</span></a> -</span><span id="explode_to_unnest-238"><a href="#explode_to_unnest-238"><span class="linenos">238</span></a> <span class="k">if</span> <span class="n">is_posexplode</span><span class="p">:</span> -</span><span id="explode_to_unnest-239"><a href="#explode_to_unnest-239"><span class="linenos">239</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span> -</span><span id="explode_to_unnest-240"><a href="#explode_to_unnest-240"><span class="linenos">240</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span> -</span><span id="explode_to_unnest-241"><a href="#explode_to_unnest-241"><span class="linenos">241</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span> -</span><span id="explode_to_unnest-242"><a href="#explode_to_unnest-242"><span class="linenos">242</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">If</span><span class="p">(</span> -</span><span id="explode_to_unnest-243"><a href="#explode_to_unnest-243"><span class="linenos">243</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">)),</span> -</span><span id="explode_to_unnest-244"><a href="#explode_to_unnest-244"><span class="linenos">244</span></a> <span class="n">true</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span> -</span><span id="explode_to_unnest-245"><a href="#explode_to_unnest-245"><span class="linenos">245</span></a> <span class="p">)</span><span class="o">.</span><span class="n">as_</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span> -</span><span id="explode_to_unnest-246"><a href="#explode_to_unnest-246"><span class="linenos">246</span></a> <span class="p">)</span> -</span><span id="explode_to_unnest-247"><a href="#explode_to_unnest-247"><span class="linenos">247</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">expressions</span><span class="p">)</span> -</span><span id="explode_to_unnest-248"><a href="#explode_to_unnest-248"><span class="linenos">248</span></a> -</span><span id="explode_to_unnest-249"><a href="#explode_to_unnest-249"><span class="linenos">249</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">arrays</span><span class="p">:</span> -</span><span id="explode_to_unnest-250"><a href="#explode_to_unnest-250"><span class="linenos">250</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">):</span> -</span><span id="explode_to_unnest-251"><a href="#explode_to_unnest-251"><span class="linenos">251</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">series</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="explode_to_unnest-252"><a href="#explode_to_unnest-252"><span class="linenos">252</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="explode_to_unnest-253"><a href="#explode_to_unnest-253"><span class="linenos">253</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">series</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="explode_to_unnest-254"><a href="#explode_to_unnest-254"><span class="linenos">254</span></a> -</span><span id="explode_to_unnest-255"><a href="#explode_to_unnest-255"><span class="linenos">255</span></a> <span class="n">size</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Condition</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">ArraySize</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> -</span><span id="explode_to_unnest-256"><a href="#explode_to_unnest-256"><span class="linenos">256</span></a> <span class="n">arrays</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">size</span><span class="p">)</span> +</span><span id="explode_to_unnest-229"><a href="#explode_to_unnest-229"><span class="linenos">229</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">pos_alias</span><span class="p">:</span> +</span><span id="explode_to_unnest-230"><a href="#explode_to_unnest-230"><span class="linenos">230</span></a> <span class="n">pos_alias</span> <span class="o">=</span> <span class="n">new_name</span><span class="p">(</span><span class="n">taken_select_names</span><span class="p">,</span> <span class="s2">"pos"</span><span class="p">)</span> +</span><span id="explode_to_unnest-231"><a href="#explode_to_unnest-231"><span class="linenos">231</span></a> +</span><span id="explode_to_unnest-232"><a href="#explode_to_unnest-232"><span class="linenos">232</span></a> <span class="n">alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">explode_alias</span><span class="p">))</span> +</span><span id="explode_to_unnest-233"><a href="#explode_to_unnest-233"><span class="linenos">233</span></a> +</span><span id="explode_to_unnest-234"><a href="#explode_to_unnest-234"><span class="linenos">234</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">If</span><span class="p">(</span> +</span><span id="explode_to_unnest-235"><a href="#explode_to_unnest-235"><span class="linenos">235</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">)),</span> +</span><span id="explode_to_unnest-236"><a href="#explode_to_unnest-236"><span class="linenos">236</span></a> <span class="n">true</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">explode_alias</span><span class="p">),</span> +</span><span id="explode_to_unnest-237"><a href="#explode_to_unnest-237"><span class="linenos">237</span></a> <span class="p">)</span> +</span><span id="explode_to_unnest-238"><a href="#explode_to_unnest-238"><span class="linenos">238</span></a> +</span><span id="explode_to_unnest-239"><a href="#explode_to_unnest-239"><span class="linenos">239</span></a> <span class="n">explode</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> +</span><span id="explode_to_unnest-240"><a href="#explode_to_unnest-240"><span class="linenos">240</span></a> +</span><span id="explode_to_unnest-241"><a href="#explode_to_unnest-241"><span class="linenos">241</span></a> <span class="k">if</span> <span class="n">is_posexplode</span><span class="p">:</span> +</span><span id="explode_to_unnest-242"><a href="#explode_to_unnest-242"><span class="linenos">242</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span> +</span><span id="explode_to_unnest-243"><a href="#explode_to_unnest-243"><span class="linenos">243</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span> +</span><span id="explode_to_unnest-244"><a href="#explode_to_unnest-244"><span class="linenos">244</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span> +</span><span id="explode_to_unnest-245"><a href="#explode_to_unnest-245"><span class="linenos">245</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">If</span><span class="p">(</span> +</span><span id="explode_to_unnest-246"><a href="#explode_to_unnest-246"><span class="linenos">246</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">)),</span> +</span><span id="explode_to_unnest-247"><a href="#explode_to_unnest-247"><span class="linenos">247</span></a> <span class="n">true</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span> +</span><span id="explode_to_unnest-248"><a href="#explode_to_unnest-248"><span class="linenos">248</span></a> <span class="p">)</span><span class="o">.</span><span class="n">as_</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span> +</span><span id="explode_to_unnest-249"><a href="#explode_to_unnest-249"><span class="linenos">249</span></a> <span class="p">)</span> +</span><span id="explode_to_unnest-250"><a href="#explode_to_unnest-250"><span class="linenos">250</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">expressions</span><span class="p">)</span> +</span><span id="explode_to_unnest-251"><a href="#explode_to_unnest-251"><span class="linenos">251</span></a> +</span><span id="explode_to_unnest-252"><a href="#explode_to_unnest-252"><span class="linenos">252</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">arrays</span><span class="p">:</span> +</span><span id="explode_to_unnest-253"><a href="#explode_to_unnest-253"><span class="linenos">253</span></a> <span class="k">if</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">):</span> +</span><span id="explode_to_unnest-254"><a href="#explode_to_unnest-254"><span class="linenos">254</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">series</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="explode_to_unnest-255"><a href="#explode_to_unnest-255"><span class="linenos">255</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="explode_to_unnest-256"><a href="#explode_to_unnest-256"><span class="linenos">256</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">series</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> </span><span id="explode_to_unnest-257"><a href="#explode_to_unnest-257"><span class="linenos">257</span></a> -</span><span id="explode_to_unnest-258"><a href="#explode_to_unnest-258"><span class="linenos">258</span></a> <span class="c1"># trino doesn't support left join unnest with on conditions</span> -</span><span id="explode_to_unnest-259"><a href="#explode_to_unnest-259"><span class="linenos">259</span></a> <span class="c1"># if it did, this would be much simpler</span> -</span><span id="explode_to_unnest-260"><a href="#explode_to_unnest-260"><span class="linenos">260</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> -</span><span id="explode_to_unnest-261"><a href="#explode_to_unnest-261"><span class="linenos">261</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span> -</span><span id="explode_to_unnest-262"><a href="#explode_to_unnest-262"><span class="linenos">262</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span> -</span><span id="explode_to_unnest-263"><a href="#explode_to_unnest-263"><span class="linenos">263</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">copy</span><span class="p">()],</span> -</span><span id="explode_to_unnest-264"><a href="#explode_to_unnest-264"><span class="linenos">264</span></a> <span class="n">offset</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span> -</span><span id="explode_to_unnest-265"><a href="#explode_to_unnest-265"><span class="linenos">265</span></a> <span class="p">),</span> -</span><span id="explode_to_unnest-266"><a href="#explode_to_unnest-266"><span class="linenos">266</span></a> <span class="n">unnest_source_alias</span><span class="p">,</span> -</span><span id="explode_to_unnest-267"><a href="#explode_to_unnest-267"><span class="linenos">267</span></a> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">explode_alias</span><span class="p">],</span> -</span><span id="explode_to_unnest-268"><a href="#explode_to_unnest-268"><span class="linenos">268</span></a> <span class="p">),</span> -</span><span id="explode_to_unnest-269"><a href="#explode_to_unnest-269"><span class="linenos">269</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">,</span> -</span><span id="explode_to_unnest-270"><a href="#explode_to_unnest-270"><span class="linenos">270</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="explode_to_unnest-271"><a href="#explode_to_unnest-271"><span class="linenos">271</span></a> <span class="p">)</span> -</span><span id="explode_to_unnest-272"><a href="#explode_to_unnest-272"><span class="linenos">272</span></a> -</span><span id="explode_to_unnest-273"><a href="#explode_to_unnest-273"><span class="linenos">273</span></a> <span class="k">if</span> <span class="n">index_offset</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span> -</span><span id="explode_to_unnest-274"><a href="#explode_to_unnest-274"><span class="linenos">274</span></a> <span class="n">size</span> <span class="o">=</span> <span class="n">size</span> <span class="o">-</span> <span class="mi">1</span> +</span><span id="explode_to_unnest-258"><a href="#explode_to_unnest-258"><span class="linenos">258</span></a> <span class="n">size</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Condition</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">ArraySize</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> +</span><span id="explode_to_unnest-259"><a href="#explode_to_unnest-259"><span class="linenos">259</span></a> <span class="n">arrays</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">size</span><span class="p">)</span> +</span><span id="explode_to_unnest-260"><a href="#explode_to_unnest-260"><span class="linenos">260</span></a> +</span><span id="explode_to_unnest-261"><a href="#explode_to_unnest-261"><span class="linenos">261</span></a> <span class="c1"># trino doesn't support left join unnest with on conditions</span> +</span><span id="explode_to_unnest-262"><a href="#explode_to_unnest-262"><span class="linenos">262</span></a> <span class="c1"># if it did, this would be much simpler</span> +</span><span id="explode_to_unnest-263"><a href="#explode_to_unnest-263"><span class="linenos">263</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> +</span><span id="explode_to_unnest-264"><a href="#explode_to_unnest-264"><span class="linenos">264</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span> +</span><span id="explode_to_unnest-265"><a href="#explode_to_unnest-265"><span class="linenos">265</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Unnest</span><span class="p">(</span> +</span><span id="explode_to_unnest-266"><a href="#explode_to_unnest-266"><span class="linenos">266</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">explode_arg</span><span class="o">.</span><span class="n">copy</span><span class="p">()],</span> +</span><span id="explode_to_unnest-267"><a href="#explode_to_unnest-267"><span class="linenos">267</span></a> <span class="n">offset</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">),</span> +</span><span id="explode_to_unnest-268"><a href="#explode_to_unnest-268"><span class="linenos">268</span></a> <span class="p">),</span> +</span><span id="explode_to_unnest-269"><a href="#explode_to_unnest-269"><span class="linenos">269</span></a> <span class="n">unnest_source_alias</span><span class="p">,</span> +</span><span id="explode_to_unnest-270"><a href="#explode_to_unnest-270"><span class="linenos">270</span></a> <span class="n">table</span><span class="o">=</span><span class="p">[</span><span class="n">explode_alias</span><span class="p">],</span> +</span><span id="explode_to_unnest-271"><a href="#explode_to_unnest-271"><span class="linenos">271</span></a> <span class="p">),</span> +</span><span id="explode_to_unnest-272"><a href="#explode_to_unnest-272"><span class="linenos">272</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">,</span> +</span><span id="explode_to_unnest-273"><a href="#explode_to_unnest-273"><span class="linenos">273</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="explode_to_unnest-274"><a href="#explode_to_unnest-274"><span class="linenos">274</span></a> <span class="p">)</span> </span><span id="explode_to_unnest-275"><a href="#explode_to_unnest-275"><span class="linenos">275</span></a> -</span><span id="explode_to_unnest-276"><a href="#explode_to_unnest-276"><span class="linenos">276</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span> -</span><span id="explode_to_unnest-277"><a href="#explode_to_unnest-277"><span class="linenos">277</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span> -</span><span id="explode_to_unnest-278"><a href="#explode_to_unnest-278"><span class="linenos">278</span></a> <span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">))</span> -</span><span id="explode_to_unnest-279"><a href="#explode_to_unnest-279"><span class="linenos">279</span></a> <span class="o">.</span><span class="n">or_</span><span class="p">(</span> -</span><span id="explode_to_unnest-280"><a href="#explode_to_unnest-280"><span class="linenos">280</span></a> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span> <span class="o">></span> <span class="n">size</span><span class="p">)</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">size</span><span class="p">))</span> -</span><span id="explode_to_unnest-281"><a href="#explode_to_unnest-281"><span class="linenos">281</span></a> <span class="p">),</span> -</span><span id="explode_to_unnest-282"><a href="#explode_to_unnest-282"><span class="linenos">282</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="explode_to_unnest-283"><a href="#explode_to_unnest-283"><span class="linenos">283</span></a> <span class="p">)</span> -</span><span id="explode_to_unnest-284"><a href="#explode_to_unnest-284"><span class="linenos">284</span></a> -</span><span id="explode_to_unnest-285"><a href="#explode_to_unnest-285"><span class="linenos">285</span></a> <span class="k">if</span> <span class="n">arrays</span><span class="p">:</span> -</span><span id="explode_to_unnest-286"><a href="#explode_to_unnest-286"><span class="linenos">286</span></a> <span class="n">end</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Condition</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Greatest</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">arrays</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">expressions</span><span class="o">=</span><span class="n">arrays</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span> +</span><span id="explode_to_unnest-276"><a href="#explode_to_unnest-276"><span class="linenos">276</span></a> <span class="k">if</span> <span class="n">index_offset</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="explode_to_unnest-277"><a href="#explode_to_unnest-277"><span class="linenos">277</span></a> <span class="n">size</span> <span class="o">=</span> <span class="n">size</span> <span class="o">-</span> <span class="mi">1</span> +</span><span id="explode_to_unnest-278"><a href="#explode_to_unnest-278"><span class="linenos">278</span></a> +</span><span id="explode_to_unnest-279"><a href="#explode_to_unnest-279"><span class="linenos">279</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span> +</span><span id="explode_to_unnest-280"><a href="#explode_to_unnest-280"><span class="linenos">280</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span> +</span><span id="explode_to_unnest-281"><a href="#explode_to_unnest-281"><span class="linenos">281</span></a> <span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">))</span> +</span><span id="explode_to_unnest-282"><a href="#explode_to_unnest-282"><span class="linenos">282</span></a> <span class="o">.</span><span class="n">or_</span><span class="p">(</span> +</span><span id="explode_to_unnest-283"><a href="#explode_to_unnest-283"><span class="linenos">283</span></a> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">series_alias</span><span class="p">)</span> <span class="o">></span> <span class="n">size</span><span class="p">)</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">pos_alias</span><span class="p">)</span><span class="o">.</span><span class="n">eq</span><span class="p">(</span><span class="n">size</span><span class="p">))</span> +</span><span id="explode_to_unnest-284"><a href="#explode_to_unnest-284"><span class="linenos">284</span></a> <span class="p">),</span> +</span><span id="explode_to_unnest-285"><a href="#explode_to_unnest-285"><span class="linenos">285</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="explode_to_unnest-286"><a href="#explode_to_unnest-286"><span class="linenos">286</span></a> <span class="p">)</span> </span><span id="explode_to_unnest-287"><a href="#explode_to_unnest-287"><span class="linenos">287</span></a> -</span><span id="explode_to_unnest-288"><a href="#explode_to_unnest-288"><span class="linenos">288</span></a> <span class="k">if</span> <span class="n">index_offset</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span> -</span><span id="explode_to_unnest-289"><a href="#explode_to_unnest-289"><span class="linenos">289</span></a> <span class="n">end</span> <span class="o">=</span> <span class="n">end</span> <span class="o">-</span> <span class="p">(</span><span class="mi">1</span> <span class="o">-</span> <span class="n">index_offset</span><span class="p">)</span> -</span><span id="explode_to_unnest-290"><a href="#explode_to_unnest-290"><span class="linenos">290</span></a> <span class="n">series</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"end"</span><span class="p">,</span> <span class="n">end</span><span class="p">)</span> -</span><span id="explode_to_unnest-291"><a href="#explode_to_unnest-291"><span class="linenos">291</span></a> -</span><span id="explode_to_unnest-292"><a href="#explode_to_unnest-292"><span class="linenos">292</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="explode_to_unnest-293"><a href="#explode_to_unnest-293"><span class="linenos">293</span></a> -</span><span id="explode_to_unnest-294"><a href="#explode_to_unnest-294"><span class="linenos">294</span></a> <span class="k">return</span> <span class="n">_explode_to_unnest</span> +</span><span id="explode_to_unnest-288"><a href="#explode_to_unnest-288"><span class="linenos">288</span></a> <span class="k">if</span> <span class="n">arrays</span><span class="p">:</span> +</span><span id="explode_to_unnest-289"><a href="#explode_to_unnest-289"><span class="linenos">289</span></a> <span class="n">end</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Condition</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Greatest</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">arrays</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">expressions</span><span class="o">=</span><span class="n">arrays</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span> +</span><span id="explode_to_unnest-290"><a href="#explode_to_unnest-290"><span class="linenos">290</span></a> +</span><span id="explode_to_unnest-291"><a href="#explode_to_unnest-291"><span class="linenos">291</span></a> <span class="k">if</span> <span class="n">index_offset</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="explode_to_unnest-292"><a href="#explode_to_unnest-292"><span class="linenos">292</span></a> <span class="n">end</span> <span class="o">=</span> <span class="n">end</span> <span class="o">-</span> <span class="p">(</span><span class="mi">1</span> <span class="o">-</span> <span class="n">index_offset</span><span class="p">)</span> +</span><span id="explode_to_unnest-293"><a href="#explode_to_unnest-293"><span class="linenos">293</span></a> <span class="n">series</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"end"</span><span class="p">,</span> <span class="n">end</span><span class="p">)</span> +</span><span id="explode_to_unnest-294"><a href="#explode_to_unnest-294"><span class="linenos">294</span></a> +</span><span id="explode_to_unnest-295"><a href="#explode_to_unnest-295"><span class="linenos">295</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="explode_to_unnest-296"><a href="#explode_to_unnest-296"><span class="linenos">296</span></a> +</span><span id="explode_to_unnest-297"><a href="#explode_to_unnest-297"><span class="linenos">297</span></a> <span class="k">return</span> <span class="n">_explode_to_unnest</span> </span></pre></div> - + <div class="docstring"><p>Convert explode/posexplode into unnest (used in hive -> presto).</p> +</div> + </section> <section id="PERCENTILES"> @@ -963,22 +1036,25 @@ other expressions. This transforms removes the precision from parameterized type </div> <a class="headerlink" href="#add_within_group_for_percentiles"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="add_within_group_for_percentiles-300"><a href="#add_within_group_for_percentiles-300"><span class="linenos">300</span></a><span class="k">def</span> <span class="nf">add_within_group_for_percentiles</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="add_within_group_for_percentiles-301"><a href="#add_within_group_for_percentiles-301"><span class="linenos">301</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="add_within_group_for_percentiles-302"><a href="#add_within_group_for_percentiles-302"><span class="linenos">302</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">PERCENTILES</span><span class="p">)</span> -</span><span id="add_within_group_for_percentiles-303"><a href="#add_within_group_for_percentiles-303"><span class="linenos">303</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">)</span> -</span><span id="add_within_group_for_percentiles-304"><a href="#add_within_group_for_percentiles-304"><span class="linenos">304</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span> -</span><span id="add_within_group_for_percentiles-305"><a href="#add_within_group_for_percentiles-305"><span class="linenos">305</span></a> <span class="p">):</span> -</span><span id="add_within_group_for_percentiles-306"><a href="#add_within_group_for_percentiles-306"><span class="linenos">306</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="add_within_group_for_percentiles-307"><a href="#add_within_group_for_percentiles-307"><span class="linenos">307</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">pop</span><span class="p">())</span> -</span><span id="add_within_group_for_percentiles-308"><a href="#add_within_group_for_percentiles-308"><span class="linenos">308</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">column</span><span class="p">)])</span> -</span><span id="add_within_group_for_percentiles-309"><a href="#add_within_group_for_percentiles-309"><span class="linenos">309</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">order</span><span class="p">)</span> -</span><span id="add_within_group_for_percentiles-310"><a href="#add_within_group_for_percentiles-310"><span class="linenos">310</span></a> -</span><span id="add_within_group_for_percentiles-311"><a href="#add_within_group_for_percentiles-311"><span class="linenos">311</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="add_within_group_for_percentiles-303"><a href="#add_within_group_for_percentiles-303"><span class="linenos">303</span></a><span class="k">def</span> <span class="nf">add_within_group_for_percentiles</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="add_within_group_for_percentiles-304"><a href="#add_within_group_for_percentiles-304"><span class="linenos">304</span></a><span class="w"> </span><span class="sd">"""Transforms percentiles by adding a WITHIN GROUP clause to them."""</span> +</span><span id="add_within_group_for_percentiles-305"><a href="#add_within_group_for_percentiles-305"><span class="linenos">305</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="add_within_group_for_percentiles-306"><a href="#add_within_group_for_percentiles-306"><span class="linenos">306</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">PERCENTILES</span><span class="p">)</span> +</span><span id="add_within_group_for_percentiles-307"><a href="#add_within_group_for_percentiles-307"><span class="linenos">307</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">)</span> +</span><span id="add_within_group_for_percentiles-308"><a href="#add_within_group_for_percentiles-308"><span class="linenos">308</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span> +</span><span id="add_within_group_for_percentiles-309"><a href="#add_within_group_for_percentiles-309"><span class="linenos">309</span></a> <span class="p">):</span> +</span><span id="add_within_group_for_percentiles-310"><a href="#add_within_group_for_percentiles-310"><span class="linenos">310</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="add_within_group_for_percentiles-311"><a href="#add_within_group_for_percentiles-311"><span class="linenos">311</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">pop</span><span class="p">())</span> +</span><span id="add_within_group_for_percentiles-312"><a href="#add_within_group_for_percentiles-312"><span class="linenos">312</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">column</span><span class="p">)])</span> +</span><span id="add_within_group_for_percentiles-313"><a href="#add_within_group_for_percentiles-313"><span class="linenos">313</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">order</span><span class="p">)</span> +</span><span id="add_within_group_for_percentiles-314"><a href="#add_within_group_for_percentiles-314"><span class="linenos">314</span></a> +</span><span id="add_within_group_for_percentiles-315"><a href="#add_within_group_for_percentiles-315"><span class="linenos">315</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> - + <div class="docstring"><p>Transforms percentiles by adding a WITHIN GROUP clause to them.</p> +</div> + </section> <section id="remove_within_group_for_percentiles"> @@ -992,21 +1068,24 @@ other expressions. This transforms removes the precision from parameterized type </div> <a class="headerlink" href="#remove_within_group_for_percentiles"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="remove_within_group_for_percentiles-314"><a href="#remove_within_group_for_percentiles-314"><span class="linenos">314</span></a><span class="k">def</span> <span class="nf">remove_within_group_for_percentiles</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="remove_within_group_for_percentiles-315"><a href="#remove_within_group_for_percentiles-315"><span class="linenos">315</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="remove_within_group_for_percentiles-316"><a href="#remove_within_group_for_percentiles-316"><span class="linenos">316</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">)</span> -</span><span id="remove_within_group_for_percentiles-317"><a href="#remove_within_group_for_percentiles-317"><span class="linenos">317</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">PERCENTILES</span><span class="p">)</span> -</span><span id="remove_within_group_for_percentiles-318"><a href="#remove_within_group_for_percentiles-318"><span class="linenos">318</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">)</span> -</span><span id="remove_within_group_for_percentiles-319"><a href="#remove_within_group_for_percentiles-319"><span class="linenos">319</span></a> <span class="p">):</span> -</span><span id="remove_within_group_for_percentiles-320"><a href="#remove_within_group_for_percentiles-320"><span class="linenos">320</span></a> <span class="n">quantile</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">this</span> -</span><span id="remove_within_group_for_percentiles-321"><a href="#remove_within_group_for_percentiles-321"><span class="linenos">321</span></a> <span class="n">input_value</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">))</span><span class="o">.</span><span class="n">this</span> -</span><span id="remove_within_group_for_percentiles-322"><a href="#remove_within_group_for_percentiles-322"><span class="linenos">322</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">ApproxQuantile</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">input_value</span><span class="p">,</span> <span class="n">quantile</span><span class="o">=</span><span class="n">quantile</span><span class="p">))</span> -</span><span id="remove_within_group_for_percentiles-323"><a href="#remove_within_group_for_percentiles-323"><span class="linenos">323</span></a> -</span><span id="remove_within_group_for_percentiles-324"><a href="#remove_within_group_for_percentiles-324"><span class="linenos">324</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="remove_within_group_for_percentiles-318"><a href="#remove_within_group_for_percentiles-318"><span class="linenos">318</span></a><span class="k">def</span> <span class="nf">remove_within_group_for_percentiles</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="remove_within_group_for_percentiles-319"><a href="#remove_within_group_for_percentiles-319"><span class="linenos">319</span></a><span class="w"> </span><span class="sd">"""Transforms percentiles by getting rid of their corresponding WITHIN GROUP clause."""</span> +</span><span id="remove_within_group_for_percentiles-320"><a href="#remove_within_group_for_percentiles-320"><span class="linenos">320</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="remove_within_group_for_percentiles-321"><a href="#remove_within_group_for_percentiles-321"><span class="linenos">321</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">WithinGroup</span><span class="p">)</span> +</span><span id="remove_within_group_for_percentiles-322"><a href="#remove_within_group_for_percentiles-322"><span class="linenos">322</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">PERCENTILES</span><span class="p">)</span> +</span><span id="remove_within_group_for_percentiles-323"><a href="#remove_within_group_for_percentiles-323"><span class="linenos">323</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">)</span> +</span><span id="remove_within_group_for_percentiles-324"><a href="#remove_within_group_for_percentiles-324"><span class="linenos">324</span></a> <span class="p">):</span> +</span><span id="remove_within_group_for_percentiles-325"><a href="#remove_within_group_for_percentiles-325"><span class="linenos">325</span></a> <span class="n">quantile</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">this</span> +</span><span id="remove_within_group_for_percentiles-326"><a href="#remove_within_group_for_percentiles-326"><span class="linenos">326</span></a> <span class="n">input_value</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">))</span><span class="o">.</span><span class="n">this</span> +</span><span id="remove_within_group_for_percentiles-327"><a href="#remove_within_group_for_percentiles-327"><span class="linenos">327</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">ApproxQuantile</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">input_value</span><span class="p">,</span> <span class="n">quantile</span><span class="o">=</span><span class="n">quantile</span><span class="p">))</span> +</span><span id="remove_within_group_for_percentiles-328"><a href="#remove_within_group_for_percentiles-328"><span class="linenos">328</span></a> +</span><span id="remove_within_group_for_percentiles-329"><a href="#remove_within_group_for_percentiles-329"><span class="linenos">329</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> - + <div class="docstring"><p>Transforms percentiles by getting rid of their corresponding WITHIN GROUP clause.</p> +</div> + </section> <section id="add_recursive_cte_column_names"> @@ -1020,26 +1099,29 @@ other expressions. This transforms removes the precision from parameterized type </div> <a class="headerlink" href="#add_recursive_cte_column_names"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="add_recursive_cte_column_names-327"><a href="#add_recursive_cte_column_names-327"><span class="linenos">327</span></a><span class="k">def</span> <span class="nf">add_recursive_cte_column_names</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="add_recursive_cte_column_names-328"><a href="#add_recursive_cte_column_names-328"><span class="linenos">328</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span> -</span><span id="add_recursive_cte_column_names-329"><a href="#add_recursive_cte_column_names-329"><span class="linenos">329</span></a> <span class="n">next_name</span> <span class="o">=</span> <span class="n">name_sequence</span><span class="p">(</span><span class="s2">"_c_"</span><span class="p">)</span> -</span><span id="add_recursive_cte_column_names-330"><a href="#add_recursive_cte_column_names-330"><span class="linenos">330</span></a> -</span><span id="add_recursive_cte_column_names-331"><a href="#add_recursive_cte_column_names-331"><span class="linenos">331</span></a> <span class="k">for</span> <span class="n">cte</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> -</span><span id="add_recursive_cte_column_names-332"><a href="#add_recursive_cte_column_names-332"><span class="linenos">332</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">cte</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> -</span><span id="add_recursive_cte_column_names-333"><a href="#add_recursive_cte_column_names-333"><span class="linenos">333</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">this</span> -</span><span id="add_recursive_cte_column_names-334"><a href="#add_recursive_cte_column_names-334"><span class="linenos">334</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> -</span><span id="add_recursive_cte_column_names-335"><a href="#add_recursive_cte_column_names-335"><span class="linenos">335</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">this</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="add_recursive_cte_column_names-332"><a href="#add_recursive_cte_column_names-332"><span class="linenos">332</span></a><span class="k">def</span> <span class="nf">add_recursive_cte_column_names</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="add_recursive_cte_column_names-333"><a href="#add_recursive_cte_column_names-333"><span class="linenos">333</span></a><span class="w"> </span><span class="sd">"""Uses projection output names in recursive CTE definitions to define the CTEs' columns."""</span> +</span><span id="add_recursive_cte_column_names-334"><a href="#add_recursive_cte_column_names-334"><span class="linenos">334</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span> +</span><span id="add_recursive_cte_column_names-335"><a href="#add_recursive_cte_column_names-335"><span class="linenos">335</span></a> <span class="n">next_name</span> <span class="o">=</span> <span class="n">name_sequence</span><span class="p">(</span><span class="s2">"_c_"</span><span class="p">)</span> </span><span id="add_recursive_cte_column_names-336"><a href="#add_recursive_cte_column_names-336"><span class="linenos">336</span></a> -</span><span id="add_recursive_cte_column_names-337"><a href="#add_recursive_cte_column_names-337"><span class="linenos">337</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span> -</span><span id="add_recursive_cte_column_names-338"><a href="#add_recursive_cte_column_names-338"><span class="linenos">338</span></a> <span class="s2">"columns"</span><span class="p">,</span> -</span><span id="add_recursive_cte_column_names-339"><a href="#add_recursive_cte_column_names-339"><span class="linenos">339</span></a> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">or</span> <span class="n">next_name</span><span class="p">())</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">query</span><span class="o">.</span><span class="n">selects</span><span class="p">],</span> -</span><span id="add_recursive_cte_column_names-340"><a href="#add_recursive_cte_column_names-340"><span class="linenos">340</span></a> <span class="p">)</span> -</span><span id="add_recursive_cte_column_names-341"><a href="#add_recursive_cte_column_names-341"><span class="linenos">341</span></a> -</span><span id="add_recursive_cte_column_names-342"><a href="#add_recursive_cte_column_names-342"><span class="linenos">342</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="add_recursive_cte_column_names-337"><a href="#add_recursive_cte_column_names-337"><span class="linenos">337</span></a> <span class="k">for</span> <span class="n">cte</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> +</span><span id="add_recursive_cte_column_names-338"><a href="#add_recursive_cte_column_names-338"><span class="linenos">338</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">cte</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> +</span><span id="add_recursive_cte_column_names-339"><a href="#add_recursive_cte_column_names-339"><span class="linenos">339</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">this</span> +</span><span id="add_recursive_cte_column_names-340"><a href="#add_recursive_cte_column_names-340"><span class="linenos">340</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> +</span><span id="add_recursive_cte_column_names-341"><a href="#add_recursive_cte_column_names-341"><span class="linenos">341</span></a> <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">this</span> +</span><span id="add_recursive_cte_column_names-342"><a href="#add_recursive_cte_column_names-342"><span class="linenos">342</span></a> +</span><span id="add_recursive_cte_column_names-343"><a href="#add_recursive_cte_column_names-343"><span class="linenos">343</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"alias"</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span> +</span><span id="add_recursive_cte_column_names-344"><a href="#add_recursive_cte_column_names-344"><span class="linenos">344</span></a> <span class="s2">"columns"</span><span class="p">,</span> +</span><span id="add_recursive_cte_column_names-345"><a href="#add_recursive_cte_column_names-345"><span class="linenos">345</span></a> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">or</span> <span class="n">next_name</span><span class="p">())</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">query</span><span class="o">.</span><span class="n">selects</span><span class="p">],</span> +</span><span id="add_recursive_cte_column_names-346"><a href="#add_recursive_cte_column_names-346"><span class="linenos">346</span></a> <span class="p">)</span> +</span><span id="add_recursive_cte_column_names-347"><a href="#add_recursive_cte_column_names-347"><span class="linenos">347</span></a> +</span><span id="add_recursive_cte_column_names-348"><a href="#add_recursive_cte_column_names-348"><span class="linenos">348</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> - + <div class="docstring"><p>Uses projection output names in recursive CTE definitions to define the CTEs' columns.</p> +</div> + </section> <section id="epoch_cast_to_ts"> @@ -1053,19 +1135,22 @@ other expressions. This transforms removes the precision from parameterized type </div> <a class="headerlink" href="#epoch_cast_to_ts"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="epoch_cast_to_ts-345"><a href="#epoch_cast_to_ts-345"><span class="linenos">345</span></a><span class="k">def</span> <span class="nf">epoch_cast_to_ts</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="epoch_cast_to_ts-346"><a href="#epoch_cast_to_ts-346"><span class="linenos">346</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="epoch_cast_to_ts-347"><a href="#epoch_cast_to_ts-347"><span class="linenos">347</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TryCast</span><span class="p">))</span> -</span><span id="epoch_cast_to_ts-348"><a href="#epoch_cast_to_ts-348"><span class="linenos">348</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">name</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s2">"epoch"</span> -</span><span id="epoch_cast_to_ts-349"><a href="#epoch_cast_to_ts-349"><span class="linenos">349</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEMPORAL_TYPES</span> -</span><span id="epoch_cast_to_ts-350"><a href="#epoch_cast_to_ts-350"><span class="linenos">350</span></a> <span class="p">):</span> -</span><span id="epoch_cast_to_ts-351"><a href="#epoch_cast_to_ts-351"><span class="linenos">351</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">string</span><span class="p">(</span><span class="s2">"1970-01-01 00:00:00"</span><span class="p">))</span> -</span><span id="epoch_cast_to_ts-352"><a href="#epoch_cast_to_ts-352"><span class="linenos">352</span></a> -</span><span id="epoch_cast_to_ts-353"><a href="#epoch_cast_to_ts-353"><span class="linenos">353</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="epoch_cast_to_ts-351"><a href="#epoch_cast_to_ts-351"><span class="linenos">351</span></a><span class="k">def</span> <span class="nf">epoch_cast_to_ts</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="epoch_cast_to_ts-352"><a href="#epoch_cast_to_ts-352"><span class="linenos">352</span></a><span class="w"> </span><span class="sd">"""Replace 'epoch' in casts by the equivalent date literal."""</span> +</span><span id="epoch_cast_to_ts-353"><a href="#epoch_cast_to_ts-353"><span class="linenos">353</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="epoch_cast_to_ts-354"><a href="#epoch_cast_to_ts-354"><span class="linenos">354</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TryCast</span><span class="p">))</span> +</span><span id="epoch_cast_to_ts-355"><a href="#epoch_cast_to_ts-355"><span class="linenos">355</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">name</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s2">"epoch"</span> +</span><span id="epoch_cast_to_ts-356"><a href="#epoch_cast_to_ts-356"><span class="linenos">356</span></a> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">to</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">TEMPORAL_TYPES</span> +</span><span id="epoch_cast_to_ts-357"><a href="#epoch_cast_to_ts-357"><span class="linenos">357</span></a> <span class="p">):</span> +</span><span id="epoch_cast_to_ts-358"><a href="#epoch_cast_to_ts-358"><span class="linenos">358</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">string</span><span class="p">(</span><span class="s2">"1970-01-01 00:00:00"</span><span class="p">))</span> +</span><span id="epoch_cast_to_ts-359"><a href="#epoch_cast_to_ts-359"><span class="linenos">359</span></a> +</span><span id="epoch_cast_to_ts-360"><a href="#epoch_cast_to_ts-360"><span class="linenos">360</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> - + <div class="docstring"><p>Replace 'epoch' in casts by the equivalent date literal.</p> +</div> + </section> <section id="eliminate_semi_and_anti_joins"> @@ -1079,24 +1164,126 @@ other expressions. This transforms removes the precision from parameterized type </div> <a class="headerlink" href="#eliminate_semi_and_anti_joins"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="eliminate_semi_and_anti_joins-356"><a href="#eliminate_semi_and_anti_joins-356"><span class="linenos">356</span></a><span class="k">def</span> <span class="nf">eliminate_semi_and_anti_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="eliminate_semi_and_anti_joins-357"><a href="#eliminate_semi_and_anti_joins-357"><span class="linenos">357</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="eliminate_semi_and_anti_joins-358"><a href="#eliminate_semi_and_anti_joins-358"><span class="linenos">358</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> -</span><span id="eliminate_semi_and_anti_joins-359"><a href="#eliminate_semi_and_anti_joins-359"><span class="linenos">359</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span> -</span><span id="eliminate_semi_and_anti_joins-360"><a href="#eliminate_semi_and_anti_joins-360"><span class="linenos">360</span></a> <span class="k">if</span> <span class="n">on</span> <span class="ow">and</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="ow">in</span> <span class="p">(</span><span class="s2">"SEMI"</span><span class="p">,</span> <span class="s2">"ANTI"</span><span class="p">):</span> -</span><span id="eliminate_semi_and_anti_joins-361"><a href="#eliminate_semi_and_anti_joins-361"><span class="linenos">361</span></a> <span class="n">subquery</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">"1"</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="p">)</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">on</span><span class="p">)</span> -</span><span id="eliminate_semi_and_anti_joins-362"><a href="#eliminate_semi_and_anti_joins-362"><span class="linenos">362</span></a> <span class="n">exists</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">subquery</span><span class="p">)</span> -</span><span id="eliminate_semi_and_anti_joins-363"><a href="#eliminate_semi_and_anti_joins-363"><span class="linenos">363</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="o">==</span> <span class="s2">"ANTI"</span><span class="p">:</span> -</span><span id="eliminate_semi_and_anti_joins-364"><a href="#eliminate_semi_and_anti_joins-364"><span class="linenos">364</span></a> <span class="n">exists</span> <span class="o">=</span> <span class="n">exists</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="eliminate_semi_and_anti_joins-365"><a href="#eliminate_semi_and_anti_joins-365"><span class="linenos">365</span></a> -</span><span id="eliminate_semi_and_anti_joins-366"><a href="#eliminate_semi_and_anti_joins-366"><span class="linenos">366</span></a> <span class="n">join</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="eliminate_semi_and_anti_joins-367"><a href="#eliminate_semi_and_anti_joins-367"><span class="linenos">367</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exists</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="eliminate_semi_and_anti_joins-368"><a href="#eliminate_semi_and_anti_joins-368"><span class="linenos">368</span></a> -</span><span id="eliminate_semi_and_anti_joins-369"><a href="#eliminate_semi_and_anti_joins-369"><span class="linenos">369</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="eliminate_semi_and_anti_joins-363"><a href="#eliminate_semi_and_anti_joins-363"><span class="linenos">363</span></a><span class="k">def</span> <span class="nf">eliminate_semi_and_anti_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="eliminate_semi_and_anti_joins-364"><a href="#eliminate_semi_and_anti_joins-364"><span class="linenos">364</span></a><span class="w"> </span><span class="sd">"""Convert SEMI and ANTI joins into equivalent forms that use EXIST instead."""</span> +</span><span id="eliminate_semi_and_anti_joins-365"><a href="#eliminate_semi_and_anti_joins-365"><span class="linenos">365</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="eliminate_semi_and_anti_joins-366"><a href="#eliminate_semi_and_anti_joins-366"><span class="linenos">366</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> +</span><span id="eliminate_semi_and_anti_joins-367"><a href="#eliminate_semi_and_anti_joins-367"><span class="linenos">367</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span> +</span><span id="eliminate_semi_and_anti_joins-368"><a href="#eliminate_semi_and_anti_joins-368"><span class="linenos">368</span></a> <span class="k">if</span> <span class="n">on</span> <span class="ow">and</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="ow">in</span> <span class="p">(</span><span class="s2">"SEMI"</span><span class="p">,</span> <span class="s2">"ANTI"</span><span class="p">):</span> +</span><span id="eliminate_semi_and_anti_joins-369"><a href="#eliminate_semi_and_anti_joins-369"><span class="linenos">369</span></a> <span class="n">subquery</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">"1"</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="p">)</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">on</span><span class="p">)</span> +</span><span id="eliminate_semi_and_anti_joins-370"><a href="#eliminate_semi_and_anti_joins-370"><span class="linenos">370</span></a> <span class="n">exists</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">subquery</span><span class="p">)</span> +</span><span id="eliminate_semi_and_anti_joins-371"><a href="#eliminate_semi_and_anti_joins-371"><span class="linenos">371</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="o">==</span> <span class="s2">"ANTI"</span><span class="p">:</span> +</span><span id="eliminate_semi_and_anti_joins-372"><a href="#eliminate_semi_and_anti_joins-372"><span class="linenos">372</span></a> <span class="n">exists</span> <span class="o">=</span> <span class="n">exists</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="eliminate_semi_and_anti_joins-373"><a href="#eliminate_semi_and_anti_joins-373"><span class="linenos">373</span></a> +</span><span id="eliminate_semi_and_anti_joins-374"><a href="#eliminate_semi_and_anti_joins-374"><span class="linenos">374</span></a> <span class="n">join</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="eliminate_semi_and_anti_joins-375"><a href="#eliminate_semi_and_anti_joins-375"><span class="linenos">375</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">exists</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="eliminate_semi_and_anti_joins-376"><a href="#eliminate_semi_and_anti_joins-376"><span class="linenos">376</span></a> +</span><span id="eliminate_semi_and_anti_joins-377"><a href="#eliminate_semi_and_anti_joins-377"><span class="linenos">377</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> - + <div class="docstring"><p>Convert SEMI and ANTI joins into equivalent forms that use EXIST instead.</p> +</div> + + + </section> + <section id="eliminate_full_outer_join"> + <input id="eliminate_full_outer_join-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + + <span class="def">def</span> + <span class="name">eliminate_full_outer_join</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span> + + <label class="view-source-button" for="eliminate_full_outer_join-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#eliminate_full_outer_join"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="eliminate_full_outer_join-380"><a href="#eliminate_full_outer_join-380"><span class="linenos">380</span></a><span class="k">def</span> <span class="nf">eliminate_full_outer_join</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="eliminate_full_outer_join-381"><a href="#eliminate_full_outer_join-381"><span class="linenos">381</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="eliminate_full_outer_join-382"><a href="#eliminate_full_outer_join-382"><span class="linenos">382</span></a><span class="sd"> Converts a query with a FULL OUTER join to a union of identical queries that</span> +</span><span id="eliminate_full_outer_join-383"><a href="#eliminate_full_outer_join-383"><span class="linenos">383</span></a><span class="sd"> use LEFT/RIGHT OUTER joins instead. This transformation currently only works</span> +</span><span id="eliminate_full_outer_join-384"><a href="#eliminate_full_outer_join-384"><span class="linenos">384</span></a><span class="sd"> for queries that have a single FULL OUTER join.</span> +</span><span id="eliminate_full_outer_join-385"><a href="#eliminate_full_outer_join-385"><span class="linenos">385</span></a><span class="sd"> """</span> +</span><span id="eliminate_full_outer_join-386"><a href="#eliminate_full_outer_join-386"><span class="linenos">386</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="eliminate_full_outer_join-387"><a href="#eliminate_full_outer_join-387"><span class="linenos">387</span></a> <span class="n">full_outer_joins</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="eliminate_full_outer_join-388"><a href="#eliminate_full_outer_join-388"><span class="linenos">388</span></a> <span class="p">(</span><span class="n">index</span><span class="p">,</span> <span class="n">join</span><span class="p">)</span> +</span><span id="eliminate_full_outer_join-389"><a href="#eliminate_full_outer_join-389"><span class="linenos">389</span></a> <span class="k">for</span> <span class="n">index</span><span class="p">,</span> <span class="n">join</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[])</span> +</span><span id="eliminate_full_outer_join-390"><a href="#eliminate_full_outer_join-390"><span class="linenos">390</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">side</span> <span class="o">==</span> <span class="s2">"FULL"</span> <span class="ow">and</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="o">==</span> <span class="s2">"OUTER"</span> +</span><span id="eliminate_full_outer_join-391"><a href="#eliminate_full_outer_join-391"><span class="linenos">391</span></a> <span class="p">]</span> +</span><span id="eliminate_full_outer_join-392"><a href="#eliminate_full_outer_join-392"><span class="linenos">392</span></a> +</span><span id="eliminate_full_outer_join-393"><a href="#eliminate_full_outer_join-393"><span class="linenos">393</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">full_outer_joins</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="eliminate_full_outer_join-394"><a href="#eliminate_full_outer_join-394"><span class="linenos">394</span></a> <span class="n">expression_copy</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> +</span><span id="eliminate_full_outer_join-395"><a href="#eliminate_full_outer_join-395"><span class="linenos">395</span></a> <span class="n">index</span><span class="p">,</span> <span class="n">full_outer_join</span> <span class="o">=</span> <span class="n">full_outer_joins</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="eliminate_full_outer_join-396"><a href="#eliminate_full_outer_join-396"><span class="linenos">396</span></a> <span class="n">full_outer_join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"side"</span><span class="p">,</span> <span class="s2">"left"</span><span class="p">)</span> +</span><span id="eliminate_full_outer_join-397"><a href="#eliminate_full_outer_join-397"><span class="linenos">397</span></a> <span class="n">expression_copy</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"joins"</span><span class="p">][</span><span class="n">index</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"side"</span><span class="p">,</span> <span class="s2">"right"</span><span class="p">)</span> +</span><span id="eliminate_full_outer_join-398"><a href="#eliminate_full_outer_join-398"><span class="linenos">398</span></a> +</span><span id="eliminate_full_outer_join-399"><a href="#eliminate_full_outer_join-399"><span class="linenos">399</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">union</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression_copy</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="eliminate_full_outer_join-400"><a href="#eliminate_full_outer_join-400"><span class="linenos">400</span></a> +</span><span id="eliminate_full_outer_join-401"><a href="#eliminate_full_outer_join-401"><span class="linenos">401</span></a> <span class="k">return</span> <span class="n">expression</span> +</span></pre></div> + + + <div class="docstring"><p>Converts a query with a FULL OUTER join to a union of identical queries that +use LEFT/RIGHT OUTER joins instead. This transformation currently only works +for queries that have a single FULL OUTER join.</p> +</div> + + + </section> + <section id="move_ctes_to_top_level"> + <input id="move_ctes_to_top_level-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + + <span class="def">def</span> + <span class="name">move_ctes_to_top_level</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span> + + <label class="view-source-button" for="move_ctes_to_top_level-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#move_ctes_to_top_level"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="move_ctes_to_top_level-404"><a href="#move_ctes_to_top_level-404"><span class="linenos">404</span></a><span class="k">def</span> <span class="nf">move_ctes_to_top_level</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="move_ctes_to_top_level-405"><a href="#move_ctes_to_top_level-405"><span class="linenos">405</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="move_ctes_to_top_level-406"><a href="#move_ctes_to_top_level-406"><span class="linenos">406</span></a><span class="sd"> Some dialects (e.g. Hive, T-SQL, Spark prior to version 3) only allow CTEs to be</span> +</span><span id="move_ctes_to_top_level-407"><a href="#move_ctes_to_top_level-407"><span class="linenos">407</span></a><span class="sd"> defined at the top-level, so for example queries like:</span> +</span><span id="move_ctes_to_top_level-408"><a href="#move_ctes_to_top_level-408"><span class="linenos">408</span></a> +</span><span id="move_ctes_to_top_level-409"><a href="#move_ctes_to_top_level-409"><span class="linenos">409</span></a><span class="sd"> SELECT * FROM (WITH t(c) AS (SELECT 1) SELECT * FROM t) AS subq</span> +</span><span id="move_ctes_to_top_level-410"><a href="#move_ctes_to_top_level-410"><span class="linenos">410</span></a> +</span><span id="move_ctes_to_top_level-411"><a href="#move_ctes_to_top_level-411"><span class="linenos">411</span></a><span class="sd"> are invalid in those dialects. This transformation can be used to ensure all CTEs are</span> +</span><span id="move_ctes_to_top_level-412"><a href="#move_ctes_to_top_level-412"><span class="linenos">412</span></a><span class="sd"> moved to the top level so that the final SQL code is valid from a syntax standpoint.</span> +</span><span id="move_ctes_to_top_level-413"><a href="#move_ctes_to_top_level-413"><span class="linenos">413</span></a> +</span><span id="move_ctes_to_top_level-414"><a href="#move_ctes_to_top_level-414"><span class="linenos">414</span></a><span class="sd"> TODO: handle name clashes whilst moving CTEs (it can get quite tricky & costly).</span> +</span><span id="move_ctes_to_top_level-415"><a href="#move_ctes_to_top_level-415"><span class="linenos">415</span></a><span class="sd"> """</span> +</span><span id="move_ctes_to_top_level-416"><a href="#move_ctes_to_top_level-416"><span class="linenos">416</span></a> <span class="n">top_level_with</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span> +</span><span id="move_ctes_to_top_level-417"><a href="#move_ctes_to_top_level-417"><span class="linenos">417</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">):</span> +</span><span id="move_ctes_to_top_level-418"><a href="#move_ctes_to_top_level-418"><span class="linenos">418</span></a> <span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">parent</span> <span class="ow">is</span> <span class="n">expression</span><span class="p">:</span> +</span><span id="move_ctes_to_top_level-419"><a href="#move_ctes_to_top_level-419"><span class="linenos">419</span></a> <span class="k">continue</span> +</span><span id="move_ctes_to_top_level-420"><a href="#move_ctes_to_top_level-420"><span class="linenos">420</span></a> +</span><span id="move_ctes_to_top_level-421"><a href="#move_ctes_to_top_level-421"><span class="linenos">421</span></a> <span class="n">inner_with</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="move_ctes_to_top_level-422"><a href="#move_ctes_to_top_level-422"><span class="linenos">422</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">top_level_with</span><span class="p">:</span> +</span><span id="move_ctes_to_top_level-423"><a href="#move_ctes_to_top_level-423"><span class="linenos">423</span></a> <span class="n">top_level_with</span> <span class="o">=</span> <span class="n">inner_with</span> +</span><span id="move_ctes_to_top_level-424"><a href="#move_ctes_to_top_level-424"><span class="linenos">424</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">top_level_with</span><span class="p">)</span> +</span><span id="move_ctes_to_top_level-425"><a href="#move_ctes_to_top_level-425"><span class="linenos">425</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="move_ctes_to_top_level-426"><a href="#move_ctes_to_top_level-426"><span class="linenos">426</span></a> <span class="k">if</span> <span class="n">inner_with</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span> +</span><span id="move_ctes_to_top_level-427"><a href="#move_ctes_to_top_level-427"><span class="linenos">427</span></a> <span class="n">top_level_with</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"recursive"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span> +</span><span id="move_ctes_to_top_level-428"><a href="#move_ctes_to_top_level-428"><span class="linenos">428</span></a> +</span><span id="move_ctes_to_top_level-429"><a href="#move_ctes_to_top_level-429"><span class="linenos">429</span></a> <span class="n">top_level_with</span><span class="o">.</span><span class="n">expressions</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">inner_with</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> +</span><span id="move_ctes_to_top_level-430"><a href="#move_ctes_to_top_level-430"><span class="linenos">430</span></a> +</span><span id="move_ctes_to_top_level-431"><a href="#move_ctes_to_top_level-431"><span class="linenos">431</span></a> <span class="k">return</span> <span class="n">expression</span> +</span></pre></div> + + + <div class="docstring"><p>Some dialects (e.g. Hive, T-SQL, Spark prior to version 3) only allow CTEs to be +defined at the top-level, so for example queries like:</p> + +<pre><code>SELECT * FROM (WITH t(c) AS (SELECT 1) SELECT * FROM t) AS subq +</code></pre> + +<p>are invalid in those dialects. This transformation can be used to ensure all CTEs are +moved to the top level so that the final SQL code is valid from a syntax standpoint.</p> + +<p>TODO: handle name clashes whilst moving CTEs (it can get quite tricky & costly).</p> +</div> + </section> <section id="preprocess"> @@ -1110,50 +1297,50 @@ other expressions. This transforms removes the precision from parameterized type </div> <a class="headerlink" href="#preprocess"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="preprocess-372"><a href="#preprocess-372"><span class="linenos">372</span></a><span class="k">def</span> <span class="nf">preprocess</span><span class="p">(</span> -</span><span id="preprocess-373"><a href="#preprocess-373"><span class="linenos">373</span></a> <span class="n">transforms</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]],</span> -</span><span id="preprocess-374"><a href="#preprocess-374"><span class="linenos">374</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">Generator</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="nb">str</span><span class="p">]:</span> -</span><span id="preprocess-375"><a href="#preprocess-375"><span class="linenos">375</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="preprocess-376"><a href="#preprocess-376"><span class="linenos">376</span></a><span class="sd"> Creates a new transform by chaining a sequence of transformations and converts the resulting</span> -</span><span id="preprocess-377"><a href="#preprocess-377"><span class="linenos">377</span></a><span class="sd"> expression to SQL, using either the "_sql" method corresponding to the resulting expression,</span> -</span><span id="preprocess-378"><a href="#preprocess-378"><span class="linenos">378</span></a><span class="sd"> or the appropriate `Generator.TRANSFORMS` function (when applicable -- see below).</span> -</span><span id="preprocess-379"><a href="#preprocess-379"><span class="linenos">379</span></a> -</span><span id="preprocess-380"><a href="#preprocess-380"><span class="linenos">380</span></a><span class="sd"> Args:</span> -</span><span id="preprocess-381"><a href="#preprocess-381"><span class="linenos">381</span></a><span class="sd"> transforms: sequence of transform functions. These will be called in order.</span> -</span><span id="preprocess-382"><a href="#preprocess-382"><span class="linenos">382</span></a> -</span><span id="preprocess-383"><a href="#preprocess-383"><span class="linenos">383</span></a><span class="sd"> Returns:</span> -</span><span id="preprocess-384"><a href="#preprocess-384"><span class="linenos">384</span></a><span class="sd"> Function that can be used as a generator transform.</span> -</span><span id="preprocess-385"><a href="#preprocess-385"><span class="linenos">385</span></a><span class="sd"> """</span> -</span><span id="preprocess-386"><a href="#preprocess-386"><span class="linenos">386</span></a> -</span><span id="preprocess-387"><a href="#preprocess-387"><span class="linenos">387</span></a> <span class="k">def</span> <span class="nf">_to_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> -</span><span id="preprocess-388"><a href="#preprocess-388"><span class="linenos">388</span></a> <span class="n">expression_type</span> <span class="o">=</span> <span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="preprocess-389"><a href="#preprocess-389"><span class="linenos">389</span></a> -</span><span id="preprocess-390"><a href="#preprocess-390"><span class="linenos">390</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">transforms</span><span class="p">[</span><span class="mi">0</span><span class="p">](</span><span class="n">expression</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> -</span><span id="preprocess-391"><a href="#preprocess-391"><span class="linenos">391</span></a> <span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="n">transforms</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span> -</span><span id="preprocess-392"><a href="#preprocess-392"><span class="linenos">392</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">t</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="preprocess-393"><a href="#preprocess-393"><span class="linenos">393</span></a> -</span><span id="preprocess-394"><a href="#preprocess-394"><span class="linenos">394</span></a> <span class="n">_sql_handler</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">key</span> <span class="o">+</span> <span class="s2">"_sql"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="preprocess-395"><a href="#preprocess-395"><span class="linenos">395</span></a> <span class="k">if</span> <span class="n">_sql_handler</span><span class="p">:</span> -</span><span id="preprocess-396"><a href="#preprocess-396"><span class="linenos">396</span></a> <span class="k">return</span> <span class="n">_sql_handler</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="preprocess-397"><a href="#preprocess-397"><span class="linenos">397</span></a> -</span><span id="preprocess-398"><a href="#preprocess-398"><span class="linenos">398</span></a> <span class="n">transforms_handler</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORMS</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">))</span> -</span><span id="preprocess-399"><a href="#preprocess-399"><span class="linenos">399</span></a> <span class="k">if</span> <span class="n">transforms_handler</span><span class="p">:</span> -</span><span id="preprocess-400"><a href="#preprocess-400"><span class="linenos">400</span></a> <span class="k">if</span> <span class="n">expression_type</span> <span class="ow">is</span> <span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="preprocess-401"><a href="#preprocess-401"><span class="linenos">401</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Func</span><span class="p">):</span> -</span><span id="preprocess-402"><a href="#preprocess-402"><span class="linenos">402</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">function_fallback_sql</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="preprocess-403"><a href="#preprocess-403"><span class="linenos">403</span></a> -</span><span id="preprocess-404"><a href="#preprocess-404"><span class="linenos">404</span></a> <span class="c1"># Ensures we don't enter an infinite loop. This can happen when the original expression</span> -</span><span id="preprocess-405"><a href="#preprocess-405"><span class="linenos">405</span></a> <span class="c1"># has the same type as the final expression and there's no _sql method available for it,</span> -</span><span id="preprocess-406"><a href="#preprocess-406"><span class="linenos">406</span></a> <span class="c1"># because then it'd re-enter _to_sql.</span> -</span><span id="preprocess-407"><a href="#preprocess-407"><span class="linenos">407</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> -</span><span id="preprocess-408"><a href="#preprocess-408"><span class="linenos">408</span></a> <span class="sa">f</span><span class="s2">"Expression type </span><span class="si">{</span><span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2"> requires a _sql method in order to be transformed."</span> -</span><span id="preprocess-409"><a href="#preprocess-409"><span class="linenos">409</span></a> <span class="p">)</span> -</span><span id="preprocess-410"><a href="#preprocess-410"><span class="linenos">410</span></a> -</span><span id="preprocess-411"><a href="#preprocess-411"><span class="linenos">411</span></a> <span class="k">return</span> <span class="n">transforms_handler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">)</span> -</span><span id="preprocess-412"><a href="#preprocess-412"><span class="linenos">412</span></a> -</span><span id="preprocess-413"><a href="#preprocess-413"><span class="linenos">413</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unsupported expression type </span><span class="si">{</span><span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2">."</span><span class="p">)</span> -</span><span id="preprocess-414"><a href="#preprocess-414"><span class="linenos">414</span></a> -</span><span id="preprocess-415"><a href="#preprocess-415"><span class="linenos">415</span></a> <span class="k">return</span> <span class="n">_to_sql</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="preprocess-434"><a href="#preprocess-434"><span class="linenos">434</span></a><span class="k">def</span> <span class="nf">preprocess</span><span class="p">(</span> +</span><span id="preprocess-435"><a href="#preprocess-435"><span class="linenos">435</span></a> <span class="n">transforms</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]],</span> +</span><span id="preprocess-436"><a href="#preprocess-436"><span class="linenos">436</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">[[</span><span class="n">Generator</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="nb">str</span><span class="p">]:</span> +</span><span id="preprocess-437"><a href="#preprocess-437"><span class="linenos">437</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="preprocess-438"><a href="#preprocess-438"><span class="linenos">438</span></a><span class="sd"> Creates a new transform by chaining a sequence of transformations and converts the resulting</span> +</span><span id="preprocess-439"><a href="#preprocess-439"><span class="linenos">439</span></a><span class="sd"> expression to SQL, using either the "_sql" method corresponding to the resulting expression,</span> +</span><span id="preprocess-440"><a href="#preprocess-440"><span class="linenos">440</span></a><span class="sd"> or the appropriate `Generator.TRANSFORMS` function (when applicable -- see below).</span> +</span><span id="preprocess-441"><a href="#preprocess-441"><span class="linenos">441</span></a> +</span><span id="preprocess-442"><a href="#preprocess-442"><span class="linenos">442</span></a><span class="sd"> Args:</span> +</span><span id="preprocess-443"><a href="#preprocess-443"><span class="linenos">443</span></a><span class="sd"> transforms: sequence of transform functions. These will be called in order.</span> +</span><span id="preprocess-444"><a href="#preprocess-444"><span class="linenos">444</span></a> +</span><span id="preprocess-445"><a href="#preprocess-445"><span class="linenos">445</span></a><span class="sd"> Returns:</span> +</span><span id="preprocess-446"><a href="#preprocess-446"><span class="linenos">446</span></a><span class="sd"> Function that can be used as a generator transform.</span> +</span><span id="preprocess-447"><a href="#preprocess-447"><span class="linenos">447</span></a><span class="sd"> """</span> +</span><span id="preprocess-448"><a href="#preprocess-448"><span class="linenos">448</span></a> +</span><span id="preprocess-449"><a href="#preprocess-449"><span class="linenos">449</span></a> <span class="k">def</span> <span class="nf">_to_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> +</span><span id="preprocess-450"><a href="#preprocess-450"><span class="linenos">450</span></a> <span class="n">expression_type</span> <span class="o">=</span> <span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="preprocess-451"><a href="#preprocess-451"><span class="linenos">451</span></a> +</span><span id="preprocess-452"><a href="#preprocess-452"><span class="linenos">452</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">transforms</span><span class="p">[</span><span class="mi">0</span><span class="p">](</span><span class="n">expression</span><span class="p">)</span> +</span><span id="preprocess-453"><a href="#preprocess-453"><span class="linenos">453</span></a> <span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="n">transforms</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span> +</span><span id="preprocess-454"><a href="#preprocess-454"><span class="linenos">454</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">t</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="preprocess-455"><a href="#preprocess-455"><span class="linenos">455</span></a> +</span><span id="preprocess-456"><a href="#preprocess-456"><span class="linenos">456</span></a> <span class="n">_sql_handler</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">key</span> <span class="o">+</span> <span class="s2">"_sql"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="preprocess-457"><a href="#preprocess-457"><span class="linenos">457</span></a> <span class="k">if</span> <span class="n">_sql_handler</span><span class="p">:</span> +</span><span id="preprocess-458"><a href="#preprocess-458"><span class="linenos">458</span></a> <span class="k">return</span> <span class="n">_sql_handler</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="preprocess-459"><a href="#preprocess-459"><span class="linenos">459</span></a> +</span><span id="preprocess-460"><a href="#preprocess-460"><span class="linenos">460</span></a> <span class="n">transforms_handler</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">TRANSFORMS</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">))</span> +</span><span id="preprocess-461"><a href="#preprocess-461"><span class="linenos">461</span></a> <span class="k">if</span> <span class="n">transforms_handler</span><span class="p">:</span> +</span><span id="preprocess-462"><a href="#preprocess-462"><span class="linenos">462</span></a> <span class="k">if</span> <span class="n">expression_type</span> <span class="ow">is</span> <span class="nb">type</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="preprocess-463"><a href="#preprocess-463"><span class="linenos">463</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Func</span><span class="p">):</span> +</span><span id="preprocess-464"><a href="#preprocess-464"><span class="linenos">464</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">function_fallback_sql</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="preprocess-465"><a href="#preprocess-465"><span class="linenos">465</span></a> +</span><span id="preprocess-466"><a href="#preprocess-466"><span class="linenos">466</span></a> <span class="c1"># Ensures we don't enter an infinite loop. This can happen when the original expression</span> +</span><span id="preprocess-467"><a href="#preprocess-467"><span class="linenos">467</span></a> <span class="c1"># has the same type as the final expression and there's no _sql method available for it,</span> +</span><span id="preprocess-468"><a href="#preprocess-468"><span class="linenos">468</span></a> <span class="c1"># because then it'd re-enter _to_sql.</span> +</span><span id="preprocess-469"><a href="#preprocess-469"><span class="linenos">469</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> +</span><span id="preprocess-470"><a href="#preprocess-470"><span class="linenos">470</span></a> <span class="sa">f</span><span class="s2">"Expression type </span><span class="si">{</span><span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2"> requires a _sql method in order to be transformed."</span> +</span><span id="preprocess-471"><a href="#preprocess-471"><span class="linenos">471</span></a> <span class="p">)</span> +</span><span id="preprocess-472"><a href="#preprocess-472"><span class="linenos">472</span></a> +</span><span id="preprocess-473"><a href="#preprocess-473"><span class="linenos">473</span></a> <span class="k">return</span> <span class="n">transforms_handler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">)</span> +</span><span id="preprocess-474"><a href="#preprocess-474"><span class="linenos">474</span></a> +</span><span id="preprocess-475"><a href="#preprocess-475"><span class="linenos">475</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unsupported expression type </span><span class="si">{</span><span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2">."</span><span class="p">)</span> +</span><span id="preprocess-476"><a href="#preprocess-476"><span class="linenos">476</span></a> +</span><span id="preprocess-477"><a href="#preprocess-477"><span class="linenos">477</span></a> <span class="k">return</span> <span class="n">_to_sql</span> </span></pre></div> |