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Diffstat (limited to 'docs/sqlglot/optimizer/qualify_columns.html')
| -rw-r--r-- | docs/sqlglot/optimizer/qualify_columns.html | 912 |
1 files changed, 600 insertions, 312 deletions
diff --git a/docs/sqlglot/optimizer/qualify_columns.html b/docs/sqlglot/optimizer/qualify_columns.html index 8ecc07d..d6425c1 100644 --- a/docs/sqlglot/optimizer/qualify_columns.html +++ b/docs/sqlglot/optimizer/qualify_columns.html @@ -36,6 +36,24 @@ <li> <a class="function" href="#validate_qualify_columns">validate_qualify_columns</a> </li> + <li> + <a class="class" href="#Resolver">Resolver</a> + <ul class="memberlist"> + <li> + <a class="function" href="#Resolver.__init__">Resolver</a> + </li> + <li> + <a class="function" href="#Resolver.get_table">get_table</a> + </li> + <li> + <a class="variable" href="#Resolver.all_columns">all_columns</a> + </li> + <li> + <a class="function" href="#Resolver.get_source_columns">get_source_columns</a> + </li> + </ul> + + </li> </ul> @@ -88,7 +106,7 @@ </span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">ensure_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> </span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a> </span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a> <span class="n">resolver</span> <span class="o">=</span> <span class="n">_Resolver</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span> +</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a> <span class="n">resolver</span> <span class="o">=</span> <span class="n">Resolver</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span> </span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">)</span> </span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">)</span> </span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a> <span class="n">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> @@ -108,235 +126,235 @@ </span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> </span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="n">unqualified_columns</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">unqualified_columns</span><span class="p">)</span> </span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_correlated_subquery</span><span class="p">:</span> -</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">table</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> -</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="k">if</span> <span class="n">unqualified_columns</span><span class="p">:</span> -</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous columns: </span><span class="si">{</span><span class="n">unqualified_columns</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> +</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: '</span><span class="si">{</span><span class="n">column</span><span class="o">.</span><span class="n">table</span><span class="si">}</span><span class="s2">' for column '</span><span class="si">{</span><span class="n">column</span><span class="si">}</span><span class="s2">'"</span><span class="p">)</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> +</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="k">if</span> <span class="n">unqualified_columns</span><span class="p">:</span> +</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous columns: </span><span class="si">{</span><span class="n">unqualified_columns</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="k">return</span> <span class="n">expression</span> </span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> -</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a><span class="k">def</span> <span class="nf">_pop_table_column_aliases</span><span class="p">(</span><span class="n">derived_tables</span><span class="p">):</span> -</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a><span class="sd"> Remove table column aliases.</span> -</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> -</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a><span class="sd"> (e.g. SELECT ... FROM (SELECT ...) AS foo(col1, col2)</span> -</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a><span class="sd"> """</span> -</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="k">for</span> <span class="n">derived_table</span> <span class="ow">in</span> <span class="n">derived_tables</span><span class="p">:</span> -</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> -</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="k">if</span> <span class="n">table_alias</span><span class="p">:</span> -</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"columns"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> +</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> +</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a><span class="k">def</span> <span class="nf">_pop_table_column_aliases</span><span class="p">(</span><span class="n">derived_tables</span><span class="p">):</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a><span class="sd"> Remove table column aliases.</span> +</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> +</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a><span class="sd"> (e.g. SELECT ... FROM (SELECT ...) AS foo(col1, col2)</span> +</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a><span class="sd"> """</span> +</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="k">for</span> <span class="n">derived_table</span> <span class="ow">in</span> <span class="n">derived_tables</span><span class="p">:</span> +</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> +</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="k">if</span> <span class="n">table_alias</span><span class="p">:</span> +</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"columns"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> </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">def</span> <span class="nf">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> -</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">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">Join</span><span class="p">))</span> -</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="n">names</span> <span class="o">=</span> <span class="p">{</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias</span> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">}</span> -</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="n">ordered</span> <span class="o">=</span> <span class="p">[</span><span class="n">key</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span> <span class="k">if</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">names</span><span class="p">]</span> -</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> -</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="c1"># Mapping of automatically joined column names to source names</span> -</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="n">column_tables</span> <span class="o">=</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">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">:</span> -</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="n">using</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"using"</span><span class="p">)</span> -</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> -</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">using</span><span class="p">:</span> -</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="k">continue</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="n">join_table</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> -</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> -</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span> -</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="k">if</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">ordered</span><span class="p">:</span> -</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">k</span><span class="p">):</span> -</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="k">if</span> <span class="n">column</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> -</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="n">columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">k</span> -</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> -</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="n">ordered</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join_table</span><span class="p">)</span> -</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="n">join_columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">join_table</span><span class="p">)</span> -</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="n">conditions</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> -</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="k">for</span> <span class="n">identifier</span> <span class="ow">in</span> <span class="n">using</span><span class="p">:</span> -</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="n">identifier</span><span class="o">.</span><span class="n">name</span> -</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">identifier</span><span class="p">)</span> -</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> -</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table</span> <span class="ow">or</span> <span class="n">identifier</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">join_columns</span><span class="p">:</span> -</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Cannot automatically join: </span><span class="si">{</span><span class="n">identifier</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> -</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="n">conditions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> -</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">condition</span><span class="p">(</span> -</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">EQ</span><span class="p">(</span> -</span><span id="L-107"><a href="#L-107"><span class="linenos">107</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">identifier</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">),</span> -</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="n">expression</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">join_table</span><span class="p">),</span> -</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="p">)</span> -</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="p">)</span> -</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="p">)</span> -</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> -</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">column_tables</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="p">[])</span> -</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="n">tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> -</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="k">if</span> <span class="n">join_table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="n">tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join_table</span><span class="p">)</span> -</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> -</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"using"</span><span class="p">)</span> -</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="o">*</span><span class="n">conditions</span><span class="p">))</span> -</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> -</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="k">if</span> <span class="n">column_tables</span><span class="p">:</span> -</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> -</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">column_tables</span><span class="p">:</span> -</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">column_tables</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span> -</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="n">coalesce</span> <span class="o">=</span> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">)</span> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">]</span> -</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="n">replacement</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Coalesce</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">coalesce</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">coalesce</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</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 class="c1"># Ensure selects keep their output name</span> -</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="n">replacement</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">replacement</span><span class="p">,</span> <span class="n">alias</span><span class="o">=</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> -</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">replacement</span><span class="p">)</span> -</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> +</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> +</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a><span class="k">def</span> <span class="nf">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> +</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">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">Join</span><span class="p">))</span> +</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="n">names</span> <span class="o">=</span> <span class="p">{</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias</span> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">}</span> +</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="n">ordered</span> <span class="o">=</span> <span class="p">[</span><span class="n">key</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span> <span class="k">if</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">names</span><span class="p">]</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> +</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="c1"># Mapping of automatically joined column names to source names</span> +</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="n">column_tables</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> +</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">:</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="n">using</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"using"</span><span class="p">)</span> +</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> +</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">using</span><span class="p">:</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="k">continue</span> +</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> +</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="n">join_table</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> +</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> +</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span> +</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="k">if</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">ordered</span><span class="p">:</span> +</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">k</span><span class="p">):</span> +</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="k">if</span> <span class="n">column</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> +</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="n">columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">k</span> +</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> +</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="n">ordered</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join_table</span><span class="p">)</span> +</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="n">join_columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">join_table</span><span class="p">)</span> +</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="n">conditions</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> +</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="k">for</span> <span class="n">identifier</span> <span class="ow">in</span> <span class="n">using</span><span class="p">:</span> +</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="n">identifier</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">identifier</span><span class="p">)</span> +</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> +</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table</span> <span class="ow">or</span> <span class="n">identifier</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">join_columns</span><span class="p">:</span> +</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Cannot automatically join: </span><span class="si">{</span><span class="n">identifier</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> +</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="n">conditions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> +</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">condition</span><span class="p">(</span> +</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">EQ</span><span class="p">(</span> +</span><span id="L-108"><a href="#L-108"><span class="linenos">108</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">identifier</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">),</span> +</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="n">expression</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">join_table</span><span class="p">),</span> +</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="p">)</span> +</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="p">)</span> +</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="p">)</span> +</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> +</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">column_tables</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="p">[])</span> +</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="n">tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="k">if</span> <span class="n">join_table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="n">tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join_table</span><span class="p">)</span> +</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> +</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"using"</span><span class="p">)</span> +</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="o">*</span><span class="n">conditions</span><span class="p">))</span> +</span><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">if</span> <span class="n">column_tables</span><span class="p">:</span> +</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> +</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">column_tables</span><span class="p">:</span> +</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">column_tables</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span> +</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="n">coalesce</span> <span class="o">=</span> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">)</span> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">]</span> +</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="n">replacement</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Coalesce</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">coalesce</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">coalesce</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span> +</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="c1"># Ensure selects keep their output name</span> +</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="n">replacement</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">replacement</span><span class="p">,</span> <span class="n">alias</span><span class="o">=</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> +</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">replacement</span><span class="p">)</span> </span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> -</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a><span class="k">def</span> <span class="nf">_expand_group_by</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> -</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="n">group</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"group"</span><span class="p">)</span> -</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">group</span><span class="p">:</span> -</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="k">return</span> -</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="c1"># Replace references to select aliases</span> -</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> <span class="k">def</span> <span class="nf">transform</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span><span class="p">):</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">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">node</span><span class="o">.</span><span class="n">table</span><span class="p">:</span> -</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> -</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="c1"># Source columns get priority over select aliases</span> -</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="k">if</span> <span class="n">table</span><span class="p">:</span> -</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="n">node</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table</span><span class="p">))</span> -</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">return</span> <span class="n">node</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">selects</span> <span class="o">=</span> <span class="p">{</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">s</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">}</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="n">select</span> <span class="o">=</span> <span class="n">selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="k">if</span> <span class="n">select</span><span class="p">:</span> -</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> -</span><span id="L-156"><a href="#L-156"><span class="linenos">156</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-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="k">return</span> <span class="n">select</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> -</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> -</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="k">return</span> <span class="n">node</span> -</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> -</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="n">group</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">transform</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-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="n">group</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">group</span><span class="o">.</span><span class="n">expressions</span><span class="p">))</span> -</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"group"</span><span class="p">,</span> <span class="n">group</span><span class="p">)</span> -</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> +</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> +</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a><span class="k">def</span> <span class="nf">_expand_group_by</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> +</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="n">group</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"group"</span><span class="p">)</span> +</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">group</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><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> +</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> <span class="c1"># Replace references to select aliases</span> +</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> <span class="k">def</span> <span class="nf">transform</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span><span class="p">):</span> +</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">node</span><span class="o">.</span><span class="n">table</span><span class="p">:</span> +</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="p">)</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="c1"># Source columns get priority over select aliases</span> +</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="k">if</span> <span class="n">table</span><span class="p">:</span> +</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="n">node</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table</span><span class="p">))</span> +</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="k">return</span> <span class="n">node</span> +</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> +</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">{</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">s</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">}</span> +</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> +</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="k">if</span> <span class="n">select</span><span class="p">:</span> +</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</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-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="k">return</span> <span class="n">select</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> +</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> +</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="k">return</span> <span class="n">node</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="n">group</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">transform</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-164"><a href="#L-164"><span class="linenos">164</span></a> <span class="n">group</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">group</span><span class="o">.</span><span class="n">expressions</span><span class="p">))</span> +</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"group"</span><span class="p">,</span> <span class="n">group</span><span class="p">)</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 class="k">def</span> <span class="nf">_expand_order_by</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> -</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">)</span> -</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">order</span><span class="p">:</span> -</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> <span class="k">return</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">ordereds</span> <span class="o">=</span> <span class="n">order</span><span class="o">.</span><span class="n">expressions</span> -</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="k">for</span> <span class="n">ordered</span><span class="p">,</span> <span class="n">new_expression</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span> -</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="n">ordereds</span><span class="p">,</span> -</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="n">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="p">(</span><span class="n">o</span><span class="o">.</span><span class="n">this</span> <span class="k">for</span> <span class="n">o</span> <span class="ow">in</span> <span class="n">ordereds</span><span class="p">)),</span> -</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="p">):</span> -</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="n">ordered</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">new_expression</span><span class="p">)</span> -</span><span id="L-178"><a href="#L-178"><span class="linenos">178</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">_expand_order_by</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> +</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">)</span> +</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">order</span><span class="p">:</span> +</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="k">return</span> +</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> +</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="n">ordereds</span> <span class="o">=</span> <span class="n">order</span><span class="o">.</span><span class="n">expressions</span> +</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="k">for</span> <span class="n">ordered</span><span class="p">,</span> <span class="n">new_expression</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span> +</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="n">ordereds</span><span class="p">,</span> +</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="n">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="p">(</span><span class="n">o</span><span class="o">.</span><span class="n">this</span> <span class="k">for</span> <span class="n">o</span> <span class="ow">in</span> <span class="n">ordereds</span><span class="p">)),</span> +</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="p">):</span> +</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="n">ordered</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">new_expression</span><span class="p">)</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="k">def</span> <span class="nf">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">expressions</span><span class="p">):</span> -</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="n">new_nodes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expressions</span><span class="p">:</span> -</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">is_int</span><span class="p">:</span> -</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="k">try</span><span class="p">:</span> -</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="nb">int</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> -</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="k">except</span> <span class="ne">IndexError</span><span class="p">:</span> -</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown output column: </span><span class="si">{</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-188"><a href="#L-188"><span class="linenos">188</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-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="n">new_nodes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> -</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> -</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="n">new_nodes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> -</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="k">return</span> <span class="n">new_nodes</span> -</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> +</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> +</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a><span class="k">def</span> <span class="nf">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">expressions</span><span class="p">):</span> +</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="n">new_nodes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expressions</span><span class="p">:</span> +</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">is_int</span><span class="p">:</span> +</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="nb">int</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> +</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="k">except</span> <span class="ne">IndexError</span><span class="p">:</span> +</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown output column: </span><span class="si">{</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-189"><a href="#L-189"><span class="linenos">189</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-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="n">new_nodes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> +</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="n">new_nodes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> +</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> <span class="k">return</span> <span class="n">new_nodes</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">def</span> <span class="nf">_qualify_columns</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> -</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a><span class="w"> </span><span class="sd">"""Disambiguate columns, ensuring each column specifies a source"""</span> -</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> -</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> -</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> <span class="n">column_name</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> -</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> -</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> <span class="k">if</span> <span class="n">column_table</span> <span class="ow">and</span> <span class="n">column_table</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> -</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> <span class="n">source_columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">column_table</span><span class="p">)</span> -</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> <span class="k">if</span> <span class="n">source_columns</span> <span class="ow">and</span> <span class="n">column_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">source_columns</span><span class="p">:</span> -</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown column: </span><span class="si">{</span><span class="n">column_name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> -</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column_table</span><span class="p">:</span> -</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span> -</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> -</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a> <span class="c1"># column_table can be a '' because bigquery unnest has no table alias</span> -</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> <span class="k">if</span> <span class="n">column_table</span><span class="p">:</span> -</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">column_table</span><span class="p">))</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="n">columns_missing_from_scope</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> <span class="c1"># Determine whether each reference in the order by clause is to a column or an alias.</span> -</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> <span class="k">for</span> <span class="n">ordered</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">):</span> -</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">ordered</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> -</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> -</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">parent</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">ordered</span> -</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">all_columns</span> -</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a> <span class="p">):</span> -</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> <span class="n">columns_missing_from_scope</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> -</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a> -</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a> <span class="c1"># Determine whether each reference in the having clause is to a column or an alias.</span> -</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a> <span class="k">for</span> <span class="n">having</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Having</span><span class="p">):</span> -</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">having</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> -</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> -</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">)</span> -</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">all_columns</span> -</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> <span class="p">):</span> -</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="n">columns_missing_from_scope</span><span class="o">.</span><span class="n">append</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">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns_missing_from_scope</span><span class="p">:</span> -</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-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">column_table</span><span class="p">:</span> -</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">column_table</span><span class="p">))</span> -</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> +</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> +</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a><span class="k">def</span> <span class="nf">_qualify_columns</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> +</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a><span class="w"> </span><span class="sd">"""Disambiguate columns, ensuring each column specifies a source"""</span> +</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> +</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> +</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="n">column_name</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> +</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> <span class="k">if</span> <span class="n">column_table</span> <span class="ow">and</span> <span class="n">column_table</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> <span class="n">source_columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">column_table</span><span class="p">)</span> +</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="k">if</span> <span class="n">source_columns</span> <span class="ow">and</span> <span class="n">column_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">source_columns</span> <span class="ow">and</span> <span class="s2">"*"</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">source_columns</span><span class="p">:</span> +</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown column: </span><span class="si">{</span><span class="n">column_name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</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="k">if</span> <span class="ow">not</span> <span class="n">column_table</span><span class="p">:</span> +</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span> +</span><span id="L-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"># column_table can be a '' because bigquery unnest has no table alias</span> +</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> <span class="k">if</span> <span class="n">column_table</span><span class="p">:</span> +</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">column_table</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">columns_missing_from_scope</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> <span class="c1"># Determine whether each reference in the order by clause is to a column or an alias.</span> +</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> <span class="k">for</span> <span class="n">ordered</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Ordered</span><span class="p">):</span> +</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">ordered</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> +</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> +</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">parent</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">ordered</span> +</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">all_columns</span> +</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> <span class="p">):</span> +</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a> <span class="n">columns_missing_from_scope</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</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="c1"># Determine whether each reference in the having clause is to a column or an alias.</span> +</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a> <span class="k">for</span> <span class="n">having</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Having</span><span class="p">):</span> +</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">having</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> +</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> +</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">)</span> +</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">all_columns</span> +</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="p">):</span> +</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a> <span class="n">columns_missing_from_scope</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</span><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="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns_missing_from_scope</span><span class="p">:</span> +</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> +</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="k">if</span> <span class="n">column_table</span><span class="p">:</span> +</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">column_table</span><span class="p">))</span> </span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> -</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a><span class="k">def</span> <span class="nf">_expand_stars</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> -</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a><span class="w"> </span><span class="sd">"""Expand stars to lists of column selections"""</span> -</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a> -</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a> <span class="n">except_columns</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a> <span class="n">replace_columns</span> <span class="o">=</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">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> -</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Star</span><span class="p">):</span> -</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> -</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="n">_add_except_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">except_columns</span><span class="p">)</span> -</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="n">_add_replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">replace_columns</span><span class="p">)</span> -</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Star</span><span class="p">):</span> -</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="p">[</span><span class="n">expression</span><span class="o">.</span><span class="n">table</span><span class="p">]</span> -</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="n">_add_except_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">except_columns</span><span class="p">)</span> -</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> <span class="n">_add_replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">replace_columns</span><span class="p">)</span> -</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="k">continue</span> -</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> -</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> -</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">table</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> -</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span><span class="p">:</span> -</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span> -</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="sa">f</span><span class="s2">"Table has no schema/columns. Cannot expand star for table: </span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2">."</span> -</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="p">)</span> -</span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> <span class="n">table_id</span> <span class="o">=</span> <span class="nb">id</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> -</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> -</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">except_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_id</span><span class="p">,</span> <span class="nb">set</span><span class="p">()):</span> -</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="n">replace_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_id</span><span class="p">,</span> <span class="p">{})</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> -</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="p">)</span> -</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">alias</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">alias_</span><span class="p">)</span> <span class="k">if</span> <span class="n">alias_</span> <span class="o">!=</span> <span class="n">name</span> <span class="k">else</span> <span class="n">column</span><span class="p">)</span> -</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a> +</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a> +</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a><span class="k">def</span> <span class="nf">_expand_stars</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> +</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a><span class="w"> </span><span class="sd">"""Expand stars to lists of column selections"""</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="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a> <span class="n">except_columns</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a> <span class="n">replace_columns</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a> +</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> +</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Star</span><span class="p">):</span> +</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> +</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="n">_add_except_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">except_columns</span><span class="p">)</span> +</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="n">_add_replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">replace_columns</span><span class="p">)</span> +</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="k">elif</span> <span class="n">expression</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span> +</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="p">[</span><span class="n">expression</span><span class="o">.</span><span class="n">table</span><span class="p">]</span> +</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> <span class="n">_add_except_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">except_columns</span><span class="p">)</span> +</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="n">_add_replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">replace_columns</span><span class="p">)</span> +</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="k">continue</span> +</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> +</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">table</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> +</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> +</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="k">if</span> <span class="n">columns</span> <span class="ow">and</span> <span class="s2">"*"</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> +</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="n">table_id</span> <span class="o">=</span> <span class="nb">id</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> +</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">except_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_id</span><span class="p">,</span> <span class="nb">set</span><span class="p">()):</span> +</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="n">replace_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_id</span><span class="p">,</span> <span class="p">{})</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> +</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="p">)</span> +</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">alias</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">alias_</span><span class="p">)</span> <span class="k">if</span> <span class="n">alias_</span> <span class="o">!=</span> <span class="n">name</span> <span class="k">else</span> <span class="n">column</span><span class="p">)</span> +</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a> <span class="k">return</span> </span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">new_selections</span><span class="p">)</span> </span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a> </span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a> @@ -374,7 +392,7 @@ </span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span> </span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">selection</span><span class="o">.</span><span class="n">output_name</span><span class="p">:</span> </span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> <span class="n">selection</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">)))</span> -</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> +</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">selection</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span> </span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="n">alias</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="s2">""</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">selection</span><span class="o">.</span><span class="n">output_name</span> <span class="ow">or</span> <span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> </span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> <span class="n">alias_</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">selection</span><span class="p">)</span> </span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="n">selection</span> <span class="o">=</span> <span class="n">alias_</span> @@ -387,7 +405,7 @@ </span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">new_selections</span><span class="p">)</span> </span><span id="L-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><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a><span class="k">class</span> <span class="nc">_Resolver</span><span class="p">:</span> +</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a><span class="k">class</span> <span class="nc">Resolver</span><span class="p">:</span> </span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a><span class="w"> </span><span class="sd">"""</span> </span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a><span class="sd"> Helper for resolving columns.</span> </span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> @@ -419,91 +437,93 @@ </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">if</span> <span class="ow">not</span> <span class="n">table</span><span class="p">:</span> </span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a> <span class="n">sources_without_schema</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span> -</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="n">source</span> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> -</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> <span class="p">)</span> -</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> -</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> <span class="k">return</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> -</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="k">return</span> <span class="n">table</span> +</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="n">source</span> +</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> +</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span> +</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> <span class="p">)</span> +</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="k">return</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</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="nd">@property</span> -</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> <span class="k">def</span> <span class="nf">all_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a><span class="w"> </span><span class="sd">"""All available columns of all sources in this scope"""</span> -</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="p">{</span> -</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a> <span class="n">column</span> <span class="k">for</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span> -</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a> <span class="p">}</span> -</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> -</span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a> -</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a> <span class="k">def</span> <span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a><span class="w"> </span><span class="sd">"""Resolve the source columns for a given source `name`"""</span> -</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> -</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> -</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> <span class="k">return</span> <span class="n">table</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 class="nd">@property</span> +</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a> <span class="k">def</span> <span class="nf">all_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a><span class="w"> </span><span class="sd">"""All available columns of all sources in this scope"""</span> +</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="p">{</span> +</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a> <span class="n">column</span> <span class="k">for</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span> +</span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a> <span class="p">}</span> +</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> +</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a> +</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a> <span class="k">def</span> <span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">False</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">"""Resolve the source columns for a given source `name`"""</span> +</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> </span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a> -</span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a> <span class="c1"># If referencing a table, return the columns from the schema</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">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> -</span><span id="L-386"><a href="#L-386"><span class="linenos">386</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span> -</span><span id="L-387"><a href="#L-387"><span class="linenos">387</span></a> -</span><span id="L-388"><a href="#L-388"><span class="linenos">388</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">):</span> -</span><span id="L-389"><a href="#L-389"><span class="linenos">389</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span> -</span><span id="L-390"><a href="#L-390"><span class="linenos">390</span></a> -</span><span id="L-391"><a href="#L-391"><span class="linenos">391</span></a> <span class="c1"># Otherwise, if referencing another scope, return that scope's named selects</span> -</span><span id="L-392"><a href="#L-392"><span class="linenos">392</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span> -</span><span id="L-393"><a href="#L-393"><span class="linenos">393</span></a> -</span><span id="L-394"><a href="#L-394"><span class="linenos">394</span></a> <span class="k">def</span> <span class="nf">_get_all_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-395"><a href="#L-395"><span class="linenos">395</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="L-396"><a href="#L-396"><span class="linenos">396</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="p">{</span> -</span><span id="L-397"><a href="#L-397"><span class="linenos">397</span></a> <span class="n">k</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">k</span><span class="p">)</span> -</span><span id="L-398"><a href="#L-398"><span class="linenos">398</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> -</span><span id="L-399"><a href="#L-399"><span class="linenos">399</span></a> <span class="p">}</span> -</span><span id="L-400"><a href="#L-400"><span class="linenos">400</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> -</span><span id="L-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 class="k">def</span> <span class="nf">_get_unambiguous_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_columns</span><span class="p">):</span> -</span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-404"><a href="#L-404"><span class="linenos">404</span></a><span class="sd"> Find all the unambiguous columns in sources.</span> -</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a> -</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a><span class="sd"> Args:</span> -</span><span id="L-407"><a href="#L-407"><span class="linenos">407</span></a><span class="sd"> source_columns (dict): Mapping of names to source columns</span> -</span><span id="L-408"><a href="#L-408"><span class="linenos">408</span></a><span class="sd"> Returns:</span> -</span><span id="L-409"><a href="#L-409"><span class="linenos">409</span></a><span class="sd"> dict: Mapping of column name to source name</span> -</span><span id="L-410"><a href="#L-410"><span class="linenos">410</span></a><span class="sd"> """</span> -</span><span id="L-411"><a href="#L-411"><span class="linenos">411</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source_columns</span><span class="p">:</span> -</span><span id="L-412"><a href="#L-412"><span class="linenos">412</span></a> <span class="k">return</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="n">source_columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">source_columns</span><span class="o">.</span><span class="n">items</span><span class="p">())</span> +</span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="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="c1"># If referencing a table, return the columns from the schema</span> +</span><span id="L-387"><a href="#L-387"><span class="linenos">387</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="L-388"><a href="#L-388"><span class="linenos">388</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span> +</span><span id="L-389"><a href="#L-389"><span class="linenos">389</span></a> +</span><span id="L-390"><a href="#L-390"><span class="linenos">390</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">):</span> +</span><span id="L-391"><a href="#L-391"><span class="linenos">391</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span> +</span><span id="L-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="c1"># Otherwise, if referencing another scope, return that scope's named selects</span> +</span><span id="L-394"><a href="#L-394"><span class="linenos">394</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span> +</span><span id="L-395"><a href="#L-395"><span class="linenos">395</span></a> +</span><span id="L-396"><a href="#L-396"><span class="linenos">396</span></a> <span class="k">def</span> <span class="nf">_get_all_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-397"><a href="#L-397"><span class="linenos">397</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-398"><a href="#L-398"><span class="linenos">398</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="p">{</span> +</span><span id="L-399"><a href="#L-399"><span class="linenos">399</span></a> <span class="n">k</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">k</span><span class="p">)</span> +</span><span id="L-400"><a href="#L-400"><span class="linenos">400</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> +</span><span id="L-401"><a href="#L-401"><span class="linenos">401</span></a> <span class="p">}</span> +</span><span id="L-402"><a href="#L-402"><span class="linenos">402</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> +</span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a> +</span><span id="L-404"><a href="#L-404"><span class="linenos">404</span></a> <span class="k">def</span> <span class="nf">_get_unambiguous_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_columns</span><span class="p">):</span> +</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a><span class="sd"> Find all the unambiguous columns in sources.</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"> Args:</span> +</span><span id="L-409"><a href="#L-409"><span class="linenos">409</span></a><span class="sd"> source_columns (dict): Mapping of names to source columns</span> +</span><span id="L-410"><a href="#L-410"><span class="linenos">410</span></a><span class="sd"> Returns:</span> +</span><span id="L-411"><a href="#L-411"><span class="linenos">411</span></a><span class="sd"> dict: Mapping of column name to source name</span> +</span><span id="L-412"><a href="#L-412"><span class="linenos">412</span></a><span class="sd"> """</span> +</span><span id="L-413"><a href="#L-413"><span class="linenos">413</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source_columns</span><span class="p">:</span> +</span><span id="L-414"><a href="#L-414"><span class="linenos">414</span></a> <span class="k">return</span> <span class="p">{}</span> </span><span id="L-415"><a href="#L-415"><span class="linenos">415</span></a> -</span><span id="L-416"><a href="#L-416"><span class="linenos">416</span></a> <span class="n">first_table</span><span class="p">,</span> <span class="n">first_columns</span> <span class="o">=</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="L-417"><a href="#L-417"><span class="linenos">417</span></a> <span class="n">unambiguous_columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">col</span><span class="p">:</span> <span class="n">first_table</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">first_columns</span><span class="p">)}</span> -</span><span id="L-418"><a href="#L-418"><span class="linenos">418</span></a> <span class="n">all_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">unambiguous_columns</span><span class="p">)</span> -</span><span id="L-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="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span> -</span><span id="L-421"><a href="#L-421"><span class="linenos">421</span></a> <span class="n">unique</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> -</span><span id="L-422"><a href="#L-422"><span class="linenos">422</span></a> <span class="n">ambiguous</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">all_columns</span><span class="p">)</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="n">unique</span><span class="p">)</span> -</span><span id="L-423"><a href="#L-423"><span class="linenos">423</span></a> <span class="n">all_columns</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> -</span><span id="L-424"><a href="#L-424"><span class="linenos">424</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">ambiguous</span><span class="p">:</span> -</span><span id="L-425"><a href="#L-425"><span class="linenos">425</span></a> <span class="n">unambiguous_columns</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="L-426"><a href="#L-426"><span class="linenos">426</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">unique</span><span class="o">.</span><span class="n">difference</span><span class="p">(</span><span class="n">ambiguous</span><span class="p">):</span> -</span><span id="L-427"><a href="#L-427"><span class="linenos">427</span></a> <span class="n">unambiguous_columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">table</span> -</span><span id="L-428"><a href="#L-428"><span class="linenos">428</span></a> -</span><span id="L-429"><a href="#L-429"><span class="linenos">429</span></a> <span class="k">return</span> <span class="n">unambiguous_columns</span> +</span><span id="L-416"><a href="#L-416"><span class="linenos">416</span></a> <span class="n">source_columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">source_columns</span><span class="o">.</span><span class="n">items</span><span class="p">())</span> +</span><span id="L-417"><a href="#L-417"><span class="linenos">417</span></a> +</span><span id="L-418"><a href="#L-418"><span class="linenos">418</span></a> <span class="n">first_table</span><span class="p">,</span> <span class="n">first_columns</span> <span class="o">=</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="L-419"><a href="#L-419"><span class="linenos">419</span></a> <span class="n">unambiguous_columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">col</span><span class="p">:</span> <span class="n">first_table</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">first_columns</span><span class="p">)}</span> +</span><span id="L-420"><a href="#L-420"><span class="linenos">420</span></a> <span class="n">all_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">unambiguous_columns</span><span class="p">)</span> +</span><span id="L-421"><a href="#L-421"><span class="linenos">421</span></a> +</span><span id="L-422"><a href="#L-422"><span class="linenos">422</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span> +</span><span id="L-423"><a href="#L-423"><span class="linenos">423</span></a> <span class="n">unique</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> +</span><span id="L-424"><a href="#L-424"><span class="linenos">424</span></a> <span class="n">ambiguous</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">all_columns</span><span class="p">)</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="n">unique</span><span class="p">)</span> +</span><span id="L-425"><a href="#L-425"><span class="linenos">425</span></a> <span class="n">all_columns</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> +</span><span id="L-426"><a href="#L-426"><span class="linenos">426</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">ambiguous</span><span class="p">:</span> +</span><span id="L-427"><a href="#L-427"><span class="linenos">427</span></a> <span class="n">unambiguous_columns</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="L-428"><a href="#L-428"><span class="linenos">428</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">unique</span><span class="o">.</span><span class="n">difference</span><span class="p">(</span><span class="n">ambiguous</span><span class="p">):</span> +</span><span id="L-429"><a href="#L-429"><span class="linenos">429</span></a> <span class="n">unambiguous_columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">table</span> </span><span id="L-430"><a href="#L-430"><span class="linenos">430</span></a> -</span><span id="L-431"><a href="#L-431"><span class="linenos">431</span></a> <span class="nd">@staticmethod</span> -</span><span id="L-432"><a href="#L-432"><span class="linenos">432</span></a> <span class="k">def</span> <span class="nf">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">):</span> -</span><span id="L-433"><a href="#L-433"><span class="linenos">433</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-434"><a href="#L-434"><span class="linenos">434</span></a><span class="sd"> Find the unique columns in a list of columns.</span> -</span><span id="L-435"><a href="#L-435"><span class="linenos">435</span></a> -</span><span id="L-436"><a href="#L-436"><span class="linenos">436</span></a><span class="sd"> Example:</span> -</span><span id="L-437"><a href="#L-437"><span class="linenos">437</span></a><span class="sd"> >>> sorted(_Resolver._find_unique_columns(["a", "b", "b", "c"]))</span> -</span><span id="L-438"><a href="#L-438"><span class="linenos">438</span></a><span class="sd"> ['a', 'c']</span> -</span><span id="L-439"><a href="#L-439"><span class="linenos">439</span></a> -</span><span id="L-440"><a href="#L-440"><span class="linenos">440</span></a><span class="sd"> This is necessary because duplicate column names are ambiguous.</span> -</span><span id="L-441"><a href="#L-441"><span class="linenos">441</span></a><span class="sd"> """</span> -</span><span id="L-442"><a href="#L-442"><span class="linenos">442</span></a> <span class="n">counts</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-443"><a href="#L-443"><span class="linenos">443</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> -</span><span id="L-444"><a href="#L-444"><span class="linenos">444</span></a> <span class="n">counts</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">counts</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span> -</span><span id="L-445"><a href="#L-445"><span class="linenos">445</span></a> <span class="k">return</span> <span class="p">{</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span><span class="p">,</span> <span class="n">count</span> <span class="ow">in</span> <span class="n">counts</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="n">count</span> <span class="o">==</span> <span class="mi">1</span><span class="p">}</span> +</span><span id="L-431"><a href="#L-431"><span class="linenos">431</span></a> <span class="k">return</span> <span class="n">unambiguous_columns</span> +</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="nd">@staticmethod</span> +</span><span id="L-434"><a href="#L-434"><span class="linenos">434</span></a> <span class="k">def</span> <span class="nf">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">):</span> +</span><span id="L-435"><a href="#L-435"><span class="linenos">435</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-436"><a href="#L-436"><span class="linenos">436</span></a><span class="sd"> Find the unique columns in a list of columns.</span> +</span><span id="L-437"><a href="#L-437"><span class="linenos">437</span></a> +</span><span id="L-438"><a href="#L-438"><span class="linenos">438</span></a><span class="sd"> Example:</span> +</span><span id="L-439"><a href="#L-439"><span class="linenos">439</span></a><span class="sd"> >>> sorted(Resolver._find_unique_columns(["a", "b", "b", "c"]))</span> +</span><span id="L-440"><a href="#L-440"><span class="linenos">440</span></a><span class="sd"> ['a', 'c']</span> +</span><span id="L-441"><a href="#L-441"><span class="linenos">441</span></a> +</span><span id="L-442"><a href="#L-442"><span class="linenos">442</span></a><span class="sd"> This is necessary because duplicate column names are ambiguous.</span> +</span><span id="L-443"><a href="#L-443"><span class="linenos">443</span></a><span class="sd"> """</span> +</span><span id="L-444"><a href="#L-444"><span class="linenos">444</span></a> <span class="n">counts</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-445"><a href="#L-445"><span class="linenos">445</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> +</span><span id="L-446"><a href="#L-446"><span class="linenos">446</span></a> <span class="n">counts</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">counts</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span> +</span><span id="L-447"><a href="#L-447"><span class="linenos">447</span></a> <span class="k">return</span> <span class="p">{</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span><span class="p">,</span> <span class="n">count</span> <span class="ow">in</span> <span class="n">counts</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="n">count</span> <span class="o">==</span> <span class="mi">1</span><span class="p">}</span> </span></pre></div> @@ -539,7 +559,7 @@ </span><span id="qualify_columns-28"><a href="#qualify_columns-28"><span class="linenos">28</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">ensure_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> </span><span id="qualify_columns-29"><a href="#qualify_columns-29"><span class="linenos">29</span></a> </span><span id="qualify_columns-30"><a href="#qualify_columns-30"><span class="linenos">30</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="qualify_columns-31"><a href="#qualify_columns-31"><span class="linenos">31</span></a> <span class="n">resolver</span> <span class="o">=</span> <span class="n">_Resolver</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span> +</span><span id="qualify_columns-31"><a href="#qualify_columns-31"><span class="linenos">31</span></a> <span class="n">resolver</span> <span class="o">=</span> <span class="n">Resolver</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span> </span><span id="qualify_columns-32"><a href="#qualify_columns-32"><span class="linenos">32</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">)</span> </span><span id="qualify_columns-33"><a href="#qualify_columns-33"><span class="linenos">33</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">)</span> </span><span id="qualify_columns-34"><a href="#qualify_columns-34"><span class="linenos">34</span></a> <span class="n">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> @@ -602,11 +622,12 @@ </span><span id="validate_qualify_columns-48"><a href="#validate_qualify_columns-48"><span class="linenos">48</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> </span><span id="validate_qualify_columns-49"><a href="#validate_qualify_columns-49"><span class="linenos">49</span></a> <span class="n">unqualified_columns</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">unqualified_columns</span><span class="p">)</span> </span><span id="validate_qualify_columns-50"><a href="#validate_qualify_columns-50"><span class="linenos">50</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_correlated_subquery</span><span class="p">:</span> -</span><span id="validate_qualify_columns-51"><a href="#validate_qualify_columns-51"><span class="linenos">51</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">table</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="validate_qualify_columns-52"><a href="#validate_qualify_columns-52"><span class="linenos">52</span></a> -</span><span id="validate_qualify_columns-53"><a href="#validate_qualify_columns-53"><span class="linenos">53</span></a> <span class="k">if</span> <span class="n">unqualified_columns</span><span class="p">:</span> -</span><span id="validate_qualify_columns-54"><a href="#validate_qualify_columns-54"><span class="linenos">54</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous columns: </span><span class="si">{</span><span class="n">unqualified_columns</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="validate_qualify_columns-55"><a href="#validate_qualify_columns-55"><span class="linenos">55</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="validate_qualify_columns-51"><a href="#validate_qualify_columns-51"><span class="linenos">51</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="validate_qualify_columns-52"><a href="#validate_qualify_columns-52"><span class="linenos">52</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: '</span><span class="si">{</span><span class="n">column</span><span class="o">.</span><span class="n">table</span><span class="si">}</span><span class="s2">' for column '</span><span class="si">{</span><span class="n">column</span><span class="si">}</span><span class="s2">'"</span><span class="p">)</span> +</span><span id="validate_qualify_columns-53"><a href="#validate_qualify_columns-53"><span class="linenos">53</span></a> +</span><span id="validate_qualify_columns-54"><a href="#validate_qualify_columns-54"><span class="linenos">54</span></a> <span class="k">if</span> <span class="n">unqualified_columns</span><span class="p">:</span> +</span><span id="validate_qualify_columns-55"><a href="#validate_qualify_columns-55"><span class="linenos">55</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous columns: </span><span class="si">{</span><span class="n">unqualified_columns</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="validate_qualify_columns-56"><a href="#validate_qualify_columns-56"><span class="linenos">56</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -615,6 +636,273 @@ </section> + <section id="Resolver"> + <input id="Resolver-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr class"> + + <span class="def">class</span> + <span class="name">Resolver</span>: + + <label class="view-source-button" for="Resolver-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#Resolver"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="Resolver-330"><a href="#Resolver-330"><span class="linenos">330</span></a><span class="k">class</span> <span class="nc">Resolver</span><span class="p">:</span> +</span><span id="Resolver-331"><a href="#Resolver-331"><span class="linenos">331</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Resolver-332"><a href="#Resolver-332"><span class="linenos">332</span></a><span class="sd"> Helper for resolving columns.</span> +</span><span id="Resolver-333"><a href="#Resolver-333"><span class="linenos">333</span></a> +</span><span id="Resolver-334"><a href="#Resolver-334"><span class="linenos">334</span></a><span class="sd"> This is a class so we can lazily load some things and easily share them across functions.</span> +</span><span id="Resolver-335"><a href="#Resolver-335"><span class="linenos">335</span></a><span class="sd"> """</span> +</span><span id="Resolver-336"><a href="#Resolver-336"><span class="linenos">336</span></a> +</span><span id="Resolver-337"><a href="#Resolver-337"><span class="linenos">337</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">):</span> +</span><span id="Resolver-338"><a href="#Resolver-338"><span class="linenos">338</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span> <span class="o">=</span> <span class="n">scope</span> +</span><span id="Resolver-339"><a href="#Resolver-339"><span class="linenos">339</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">schema</span> +</span><span id="Resolver-340"><a href="#Resolver-340"><span class="linenos">340</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Resolver-341"><a href="#Resolver-341"><span class="linenos">341</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Resolver-342"><a href="#Resolver-342"><span class="linenos">342</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Resolver-343"><a href="#Resolver-343"><span class="linenos">343</span></a> +</span><span id="Resolver-344"><a href="#Resolver-344"><span class="linenos">344</span></a> <span class="k">def</span> <span class="nf">get_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> +</span><span id="Resolver-345"><a href="#Resolver-345"><span class="linenos">345</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Resolver-346"><a href="#Resolver-346"><span class="linenos">346</span></a><span class="sd"> Get the table for a column name.</span> +</span><span id="Resolver-347"><a href="#Resolver-347"><span class="linenos">347</span></a> +</span><span id="Resolver-348"><a href="#Resolver-348"><span class="linenos">348</span></a><span class="sd"> Args:</span> +</span><span id="Resolver-349"><a href="#Resolver-349"><span class="linenos">349</span></a><span class="sd"> column_name: The column name to find the table for.</span> +</span><span id="Resolver-350"><a href="#Resolver-350"><span class="linenos">350</span></a><span class="sd"> Returns:</span> +</span><span id="Resolver-351"><a href="#Resolver-351"><span class="linenos">351</span></a><span class="sd"> The table name if it can be found/inferred.</span> +</span><span id="Resolver-352"><a href="#Resolver-352"><span class="linenos">352</span></a><span class="sd"> """</span> +</span><span id="Resolver-353"><a href="#Resolver-353"><span class="linenos">353</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Resolver-354"><a href="#Resolver-354"><span class="linenos">354</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_unambiguous_columns</span><span class="p">(</span> +</span><span id="Resolver-355"><a href="#Resolver-355"><span class="linenos">355</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span> +</span><span id="Resolver-356"><a href="#Resolver-356"><span class="linenos">356</span></a> <span class="p">)</span> +</span><span id="Resolver-357"><a href="#Resolver-357"><span class="linenos">357</span></a> +</span><span id="Resolver-358"><a href="#Resolver-358"><span class="linenos">358</span></a> <span class="n">table</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span> +</span><span id="Resolver-359"><a href="#Resolver-359"><span class="linenos">359</span></a> +</span><span id="Resolver-360"><a href="#Resolver-360"><span class="linenos">360</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table</span><span class="p">:</span> +</span><span id="Resolver-361"><a href="#Resolver-361"><span class="linenos">361</span></a> <span class="n">sources_without_schema</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span> +</span><span id="Resolver-362"><a href="#Resolver-362"><span class="linenos">362</span></a> <span class="n">source</span> +</span><span id="Resolver-363"><a href="#Resolver-363"><span class="linenos">363</span></a> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> +</span><span id="Resolver-364"><a href="#Resolver-364"><span class="linenos">364</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span> +</span><span id="Resolver-365"><a href="#Resolver-365"><span class="linenos">365</span></a> <span class="p">)</span> +</span><span id="Resolver-366"><a href="#Resolver-366"><span class="linenos">366</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="Resolver-367"><a href="#Resolver-367"><span class="linenos">367</span></a> <span class="k">return</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="Resolver-368"><a href="#Resolver-368"><span class="linenos">368</span></a> +</span><span id="Resolver-369"><a href="#Resolver-369"><span class="linenos">369</span></a> <span class="k">return</span> <span class="n">table</span> +</span><span id="Resolver-370"><a href="#Resolver-370"><span class="linenos">370</span></a> +</span><span id="Resolver-371"><a href="#Resolver-371"><span class="linenos">371</span></a> <span class="nd">@property</span> +</span><span id="Resolver-372"><a href="#Resolver-372"><span class="linenos">372</span></a> <span class="k">def</span> <span class="nf">all_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Resolver-373"><a href="#Resolver-373"><span class="linenos">373</span></a><span class="w"> </span><span class="sd">"""All available columns of all sources in this scope"""</span> +</span><span id="Resolver-374"><a href="#Resolver-374"><span class="linenos">374</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Resolver-375"><a href="#Resolver-375"><span class="linenos">375</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="p">{</span> +</span><span id="Resolver-376"><a href="#Resolver-376"><span class="linenos">376</span></a> <span class="n">column</span> <span class="k">for</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span> +</span><span id="Resolver-377"><a href="#Resolver-377"><span class="linenos">377</span></a> <span class="p">}</span> +</span><span id="Resolver-378"><a href="#Resolver-378"><span class="linenos">378</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> +</span><span id="Resolver-379"><a href="#Resolver-379"><span class="linenos">379</span></a> +</span><span id="Resolver-380"><a href="#Resolver-380"><span class="linenos">380</span></a> <span class="k">def</span> <span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="Resolver-381"><a href="#Resolver-381"><span class="linenos">381</span></a><span class="w"> </span><span class="sd">"""Resolve the source columns for a given source `name`"""</span> +</span><span id="Resolver-382"><a href="#Resolver-382"><span class="linenos">382</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="Resolver-383"><a href="#Resolver-383"><span class="linenos">383</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="Resolver-384"><a href="#Resolver-384"><span class="linenos">384</span></a> +</span><span id="Resolver-385"><a href="#Resolver-385"><span class="linenos">385</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="Resolver-386"><a href="#Resolver-386"><span class="linenos">386</span></a> +</span><span id="Resolver-387"><a href="#Resolver-387"><span class="linenos">387</span></a> <span class="c1"># If referencing a table, return the columns from the schema</span> +</span><span id="Resolver-388"><a href="#Resolver-388"><span class="linenos">388</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="Resolver-389"><a href="#Resolver-389"><span class="linenos">389</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span> +</span><span id="Resolver-390"><a href="#Resolver-390"><span class="linenos">390</span></a> +</span><span id="Resolver-391"><a href="#Resolver-391"><span class="linenos">391</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">):</span> +</span><span id="Resolver-392"><a href="#Resolver-392"><span class="linenos">392</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span> +</span><span id="Resolver-393"><a href="#Resolver-393"><span class="linenos">393</span></a> +</span><span id="Resolver-394"><a href="#Resolver-394"><span class="linenos">394</span></a> <span class="c1"># Otherwise, if referencing another scope, return that scope's named selects</span> +</span><span id="Resolver-395"><a href="#Resolver-395"><span class="linenos">395</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span> +</span><span id="Resolver-396"><a href="#Resolver-396"><span class="linenos">396</span></a> +</span><span id="Resolver-397"><a href="#Resolver-397"><span class="linenos">397</span></a> <span class="k">def</span> <span class="nf">_get_all_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Resolver-398"><a href="#Resolver-398"><span class="linenos">398</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Resolver-399"><a href="#Resolver-399"><span class="linenos">399</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="p">{</span> +</span><span id="Resolver-400"><a href="#Resolver-400"><span class="linenos">400</span></a> <span class="n">k</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">k</span><span class="p">)</span> +</span><span id="Resolver-401"><a href="#Resolver-401"><span class="linenos">401</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> +</span><span id="Resolver-402"><a href="#Resolver-402"><span class="linenos">402</span></a> <span class="p">}</span> +</span><span id="Resolver-403"><a href="#Resolver-403"><span class="linenos">403</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> +</span><span id="Resolver-404"><a href="#Resolver-404"><span class="linenos">404</span></a> +</span><span id="Resolver-405"><a href="#Resolver-405"><span class="linenos">405</span></a> <span class="k">def</span> <span class="nf">_get_unambiguous_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_columns</span><span class="p">):</span> +</span><span id="Resolver-406"><a href="#Resolver-406"><span class="linenos">406</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Resolver-407"><a href="#Resolver-407"><span class="linenos">407</span></a><span class="sd"> Find all the unambiguous columns in sources.</span> +</span><span id="Resolver-408"><a href="#Resolver-408"><span class="linenos">408</span></a> +</span><span id="Resolver-409"><a href="#Resolver-409"><span class="linenos">409</span></a><span class="sd"> Args:</span> +</span><span id="Resolver-410"><a href="#Resolver-410"><span class="linenos">410</span></a><span class="sd"> source_columns (dict): Mapping of names to source columns</span> +</span><span id="Resolver-411"><a href="#Resolver-411"><span class="linenos">411</span></a><span class="sd"> Returns:</span> +</span><span id="Resolver-412"><a href="#Resolver-412"><span class="linenos">412</span></a><span class="sd"> dict: Mapping of column name to source name</span> +</span><span id="Resolver-413"><a href="#Resolver-413"><span class="linenos">413</span></a><span class="sd"> """</span> +</span><span id="Resolver-414"><a href="#Resolver-414"><span class="linenos">414</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source_columns</span><span class="p">:</span> +</span><span id="Resolver-415"><a href="#Resolver-415"><span class="linenos">415</span></a> <span class="k">return</span> <span class="p">{}</span> +</span><span id="Resolver-416"><a href="#Resolver-416"><span class="linenos">416</span></a> +</span><span id="Resolver-417"><a href="#Resolver-417"><span class="linenos">417</span></a> <span class="n">source_columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">source_columns</span><span class="o">.</span><span class="n">items</span><span class="p">())</span> +</span><span id="Resolver-418"><a href="#Resolver-418"><span class="linenos">418</span></a> +</span><span id="Resolver-419"><a href="#Resolver-419"><span class="linenos">419</span></a> <span class="n">first_table</span><span class="p">,</span> <span class="n">first_columns</span> <span class="o">=</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="Resolver-420"><a href="#Resolver-420"><span class="linenos">420</span></a> <span class="n">unambiguous_columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">col</span><span class="p">:</span> <span class="n">first_table</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">first_columns</span><span class="p">)}</span> +</span><span id="Resolver-421"><a href="#Resolver-421"><span class="linenos">421</span></a> <span class="n">all_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">unambiguous_columns</span><span class="p">)</span> +</span><span id="Resolver-422"><a href="#Resolver-422"><span class="linenos">422</span></a> +</span><span id="Resolver-423"><a href="#Resolver-423"><span class="linenos">423</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span> +</span><span id="Resolver-424"><a href="#Resolver-424"><span class="linenos">424</span></a> <span class="n">unique</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> +</span><span id="Resolver-425"><a href="#Resolver-425"><span class="linenos">425</span></a> <span class="n">ambiguous</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">all_columns</span><span class="p">)</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="n">unique</span><span class="p">)</span> +</span><span id="Resolver-426"><a href="#Resolver-426"><span class="linenos">426</span></a> <span class="n">all_columns</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> +</span><span id="Resolver-427"><a href="#Resolver-427"><span class="linenos">427</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">ambiguous</span><span class="p">:</span> +</span><span id="Resolver-428"><a href="#Resolver-428"><span class="linenos">428</span></a> <span class="n">unambiguous_columns</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="Resolver-429"><a href="#Resolver-429"><span class="linenos">429</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">unique</span><span class="o">.</span><span class="n">difference</span><span class="p">(</span><span class="n">ambiguous</span><span class="p">):</span> +</span><span id="Resolver-430"><a href="#Resolver-430"><span class="linenos">430</span></a> <span class="n">unambiguous_columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">table</span> +</span><span id="Resolver-431"><a href="#Resolver-431"><span class="linenos">431</span></a> +</span><span id="Resolver-432"><a href="#Resolver-432"><span class="linenos">432</span></a> <span class="k">return</span> <span class="n">unambiguous_columns</span> +</span><span id="Resolver-433"><a href="#Resolver-433"><span class="linenos">433</span></a> +</span><span id="Resolver-434"><a href="#Resolver-434"><span class="linenos">434</span></a> <span class="nd">@staticmethod</span> +</span><span id="Resolver-435"><a href="#Resolver-435"><span class="linenos">435</span></a> <span class="k">def</span> <span class="nf">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">):</span> +</span><span id="Resolver-436"><a href="#Resolver-436"><span class="linenos">436</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Resolver-437"><a href="#Resolver-437"><span class="linenos">437</span></a><span class="sd"> Find the unique columns in a list of columns.</span> +</span><span id="Resolver-438"><a href="#Resolver-438"><span class="linenos">438</span></a> +</span><span id="Resolver-439"><a href="#Resolver-439"><span class="linenos">439</span></a><span class="sd"> Example:</span> +</span><span id="Resolver-440"><a href="#Resolver-440"><span class="linenos">440</span></a><span class="sd"> >>> sorted(Resolver._find_unique_columns(["a", "b", "b", "c"]))</span> +</span><span id="Resolver-441"><a href="#Resolver-441"><span class="linenos">441</span></a><span class="sd"> ['a', 'c']</span> +</span><span id="Resolver-442"><a href="#Resolver-442"><span class="linenos">442</span></a> +</span><span id="Resolver-443"><a href="#Resolver-443"><span class="linenos">443</span></a><span class="sd"> This is necessary because duplicate column names are ambiguous.</span> +</span><span id="Resolver-444"><a href="#Resolver-444"><span class="linenos">444</span></a><span class="sd"> """</span> +</span><span id="Resolver-445"><a href="#Resolver-445"><span class="linenos">445</span></a> <span class="n">counts</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="Resolver-446"><a href="#Resolver-446"><span class="linenos">446</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> +</span><span id="Resolver-447"><a href="#Resolver-447"><span class="linenos">447</span></a> <span class="n">counts</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">counts</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span> +</span><span id="Resolver-448"><a href="#Resolver-448"><span class="linenos">448</span></a> <span class="k">return</span> <span class="p">{</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span><span class="p">,</span> <span class="n">count</span> <span class="ow">in</span> <span class="n">counts</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="n">count</span> <span class="o">==</span> <span class="mi">1</span><span class="p">}</span> +</span></pre></div> + + + <div class="docstring"><p>Helper for resolving columns.</p> + +<p>This is a class so we can lazily load some things and easily share them across functions.</p> +</div> + + + <div id="Resolver.__init__" class="classattr"> + <input id="Resolver.__init__-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + + <span class="name">Resolver</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">scope</span>, </span><span class="param"><span class="n">schema</span></span>)</span> + + <label class="view-source-button" for="Resolver.__init__-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#Resolver.__init__"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.__init__-337"><a href="#Resolver.__init__-337"><span class="linenos">337</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">):</span> +</span><span id="Resolver.__init__-338"><a href="#Resolver.__init__-338"><span class="linenos">338</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span> <span class="o">=</span> <span class="n">scope</span> +</span><span id="Resolver.__init__-339"><a href="#Resolver.__init__-339"><span class="linenos">339</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">schema</span> +</span><span id="Resolver.__init__-340"><a href="#Resolver.__init__-340"><span class="linenos">340</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Resolver.__init__-341"><a href="#Resolver.__init__-341"><span class="linenos">341</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Resolver.__init__-342"><a href="#Resolver.__init__-342"><span class="linenos">342</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span></pre></div> + + + + + </div> + <div id="Resolver.get_table" class="classattr"> + <input id="Resolver.get_table-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + + <span class="def">def</span> + <span class="name">get_table</span><span class="signature pdoc-code condensed">(<span class="param"><span class="bp">self</span>, </span><span class="param"><span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span></span><span class="return-annotation">) -> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span>:</span></span> + + <label class="view-source-button" for="Resolver.get_table-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#Resolver.get_table"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.get_table-344"><a href="#Resolver.get_table-344"><span class="linenos">344</span></a> <span class="k">def</span> <span class="nf">get_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> +</span><span id="Resolver.get_table-345"><a href="#Resolver.get_table-345"><span class="linenos">345</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Resolver.get_table-346"><a href="#Resolver.get_table-346"><span class="linenos">346</span></a><span class="sd"> Get the table for a column name.</span> +</span><span id="Resolver.get_table-347"><a href="#Resolver.get_table-347"><span class="linenos">347</span></a> +</span><span id="Resolver.get_table-348"><a href="#Resolver.get_table-348"><span class="linenos">348</span></a><span class="sd"> Args:</span> +</span><span id="Resolver.get_table-349"><a href="#Resolver.get_table-349"><span class="linenos">349</span></a><span class="sd"> column_name: The column name to find the table for.</span> +</span><span id="Resolver.get_table-350"><a href="#Resolver.get_table-350"><span class="linenos">350</span></a><span class="sd"> Returns:</span> +</span><span id="Resolver.get_table-351"><a href="#Resolver.get_table-351"><span class="linenos">351</span></a><span class="sd"> The table name if it can be found/inferred.</span> +</span><span id="Resolver.get_table-352"><a href="#Resolver.get_table-352"><span class="linenos">352</span></a><span class="sd"> """</span> +</span><span id="Resolver.get_table-353"><a href="#Resolver.get_table-353"><span class="linenos">353</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Resolver.get_table-354"><a href="#Resolver.get_table-354"><span class="linenos">354</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_unambiguous_columns</span><span class="p">(</span> +</span><span id="Resolver.get_table-355"><a href="#Resolver.get_table-355"><span class="linenos">355</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span> +</span><span id="Resolver.get_table-356"><a href="#Resolver.get_table-356"><span class="linenos">356</span></a> <span class="p">)</span> +</span><span id="Resolver.get_table-357"><a href="#Resolver.get_table-357"><span class="linenos">357</span></a> +</span><span id="Resolver.get_table-358"><a href="#Resolver.get_table-358"><span class="linenos">358</span></a> <span class="n">table</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span> +</span><span id="Resolver.get_table-359"><a href="#Resolver.get_table-359"><span class="linenos">359</span></a> +</span><span id="Resolver.get_table-360"><a href="#Resolver.get_table-360"><span class="linenos">360</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table</span><span class="p">:</span> +</span><span id="Resolver.get_table-361"><a href="#Resolver.get_table-361"><span class="linenos">361</span></a> <span class="n">sources_without_schema</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span> +</span><span id="Resolver.get_table-362"><a href="#Resolver.get_table-362"><span class="linenos">362</span></a> <span class="n">source</span> +</span><span id="Resolver.get_table-363"><a href="#Resolver.get_table-363"><span class="linenos">363</span></a> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> +</span><span id="Resolver.get_table-364"><a href="#Resolver.get_table-364"><span class="linenos">364</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span> +</span><span id="Resolver.get_table-365"><a href="#Resolver.get_table-365"><span class="linenos">365</span></a> <span class="p">)</span> +</span><span id="Resolver.get_table-366"><a href="#Resolver.get_table-366"><span class="linenos">366</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="Resolver.get_table-367"><a href="#Resolver.get_table-367"><span class="linenos">367</span></a> <span class="k">return</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="Resolver.get_table-368"><a href="#Resolver.get_table-368"><span class="linenos">368</span></a> +</span><span id="Resolver.get_table-369"><a href="#Resolver.get_table-369"><span class="linenos">369</span></a> <span class="k">return</span> <span class="n">table</span> +</span></pre></div> + + + <div class="docstring"><p>Get the table for a column name.</p> + +<h6 id="arguments">Arguments:</h6> + +<ul> +<li><strong>column_name:</strong> The column name to find the table for.</li> +</ul> + +<h6 id="returns">Returns:</h6> + +<blockquote> + <p>The table name if it can be found/inferred.</p> +</blockquote> +</div> + + + </div> + <div id="Resolver.all_columns" class="classattr"> + <div class="attr variable"> + <span class="name">all_columns</span> + + + </div> + <a class="headerlink" href="#Resolver.all_columns"></a> + + <div class="docstring"><p>All available columns of all sources in this scope</p> +</div> + + + </div> + <div id="Resolver.get_source_columns" class="classattr"> + <input id="Resolver.get_source_columns-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + + <span class="def">def</span> + <span class="name">get_source_columns</span><span class="signature pdoc-code condensed">(<span class="param"><span class="bp">self</span>, </span><span class="param"><span class="n">name</span>, </span><span class="param"><span class="n">only_visible</span><span class="o">=</span><span class="kc">False</span></span><span class="return-annotation">):</span></span> + + <label class="view-source-button" for="Resolver.get_source_columns-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#Resolver.get_source_columns"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.get_source_columns-380"><a href="#Resolver.get_source_columns-380"><span class="linenos">380</span></a> <span class="k">def</span> <span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="Resolver.get_source_columns-381"><a href="#Resolver.get_source_columns-381"><span class="linenos">381</span></a><span class="w"> </span><span class="sd">"""Resolve the source columns for a given source `name`"""</span> +</span><span id="Resolver.get_source_columns-382"><a href="#Resolver.get_source_columns-382"><span class="linenos">382</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="Resolver.get_source_columns-383"><a href="#Resolver.get_source_columns-383"><span class="linenos">383</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="Resolver.get_source_columns-384"><a href="#Resolver.get_source_columns-384"><span class="linenos">384</span></a> +</span><span id="Resolver.get_source_columns-385"><a href="#Resolver.get_source_columns-385"><span class="linenos">385</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="Resolver.get_source_columns-386"><a href="#Resolver.get_source_columns-386"><span class="linenos">386</span></a> +</span><span id="Resolver.get_source_columns-387"><a href="#Resolver.get_source_columns-387"><span class="linenos">387</span></a> <span class="c1"># If referencing a table, return the columns from the schema</span> +</span><span id="Resolver.get_source_columns-388"><a href="#Resolver.get_source_columns-388"><span class="linenos">388</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="Resolver.get_source_columns-389"><a href="#Resolver.get_source_columns-389"><span class="linenos">389</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span> +</span><span id="Resolver.get_source_columns-390"><a href="#Resolver.get_source_columns-390"><span class="linenos">390</span></a> +</span><span id="Resolver.get_source_columns-391"><a href="#Resolver.get_source_columns-391"><span class="linenos">391</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">):</span> +</span><span id="Resolver.get_source_columns-392"><a href="#Resolver.get_source_columns-392"><span class="linenos">392</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span> +</span><span id="Resolver.get_source_columns-393"><a href="#Resolver.get_source_columns-393"><span class="linenos">393</span></a> +</span><span id="Resolver.get_source_columns-394"><a href="#Resolver.get_source_columns-394"><span class="linenos">394</span></a> <span class="c1"># Otherwise, if referencing another scope, return that scope's named selects</span> +</span><span id="Resolver.get_source_columns-395"><a href="#Resolver.get_source_columns-395"><span class="linenos">395</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span> +</span></pre></div> + + + <div class="docstring"><p>Resolve the source columns for a given source <code>name</code></p> +</div> + + + </div> + </section> </main> <script> function escapeHTML(html) { |