Merging upstream version 20.11.0.
Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
parent
1bce3d0317
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141 changed files with 66644 additions and 54334 deletions
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta name="generator" content="pdoc 14.3.0"/>
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<meta name="generator" content="pdoc 14.4.0"/>
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<title>sqlglot.optimizer.pushdown_projections API documentation</title>
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<style>/*! * Bootstrap Reboot v5.0.0 (https://getbootstrap.com/) * Copyright 2011-2021 The Bootstrap Authors * Copyright 2011-2021 Twitter, Inc. * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE) * Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md) */*,::after,::before{box-sizing:border-box}@media (prefers-reduced-motion:no-preference){:root{scroll-behavior:smooth}}body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","Liberation Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";font-size:1rem;font-weight:400;line-height:1.5;color:#212529;background-color:#fff;-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}hr{margin:1rem 0;color:inherit;background-color:currentColor;border:0;opacity:.25}hr:not([size]){height:1px}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:.5rem;font-weight:500;line-height:1.2}h1{font-size:calc(1.375rem + 1.5vw)}@media (min-width:1200px){h1{font-size:2.5rem}}h2{font-size:calc(1.325rem + .9vw)}@media (min-width:1200px){h2{font-size:2rem}}h3{font-size:calc(1.3rem + .6vw)}@media (min-width:1200px){h3{font-size:1.75rem}}h4{font-size:calc(1.275rem + .3vw)}@media (min-width:1200px){h4{font-size:1.5rem}}h5{font-size:1.25rem}h6{font-size:1rem}p{margin-top:0;margin-bottom:1rem}abbr[data-bs-original-title],abbr[title]{-webkit-text-decoration:underline dotted;text-decoration:underline dotted;cursor:help;-webkit-text-decoration-skip-ink:none;text-decoration-skip-ink:none}address{margin-bottom:1rem;font-style:normal;line-height:inherit}ol,ul{padding-left:2rem}dl,ol,ul{margin-top:0;margin-bottom:1rem}ol ol,ol ul,ul ol,ul ul{margin-bottom:0}dt{font-weight:700}dd{margin-bottom:.5rem;margin-left:0}blockquote{margin:0 0 1rem}b,strong{font-weight:bolder}small{font-size:.875em}mark{padding:.2em;background-color:#fcf8e3}sub,sup{position:relative;font-size:.75em;line-height:0;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}a{color:#0d6efd;text-decoration:underline}a:hover{color:#0a58ca}a:not([href]):not([class]),a:not([href]):not([class]):hover{color:inherit;text-decoration:none}code,kbd,pre,samp{font-family:SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;font-size:1em;direction:ltr;unicode-bidi:bidi-override}pre{display:block;margin-top:0;margin-bottom:1rem;overflow:auto;font-size:.875em}pre code{font-size:inherit;color:inherit;word-break:normal}code{font-size:.875em;color:#d63384;word-wrap:break-word}a>code{color:inherit}kbd{padding:.2rem .4rem;font-size:.875em;color:#fff;background-color:#212529;border-radius:.2rem}kbd kbd{padding:0;font-size:1em;font-weight:700}figure{margin:0 0 1rem}img,svg{vertical-align:middle}table{caption-side:bottom;border-collapse:collapse}caption{padding-top:.5rem;padding-bottom:.5rem;color:#6c757d;text-align:left}th{text-align:inherit;text-align:-webkit-match-parent}tbody,td,tfoot,th,thead,tr{border-color:inherit;border-style:solid;border-width:0}label{display:inline-block}button{border-radius:0}button:focus:not(:focus-visible){outline:0}button,input,optgroup,select,textarea{margin:0;font-family:inherit;font-size:inherit;line-height:inherit}button,select{text-transform:none}[role=button]{cursor:pointer}select{word-wrap:normal}select:disabled{opacity:1}[list]::-webkit-calendar-picker-indicator{display:none}[type=button],[type=reset],[type=submit],button{-webkit-appearance:button}[type=button]:not(:disabled),[type=reset]:not(:disabled),[type=submit]:not(:disabled),button:not(:disabled){cursor:pointer}::-moz-focus-inner{padding:0;border-style:none}textarea{resize:vertical}fieldset{min-width:0;padding:0;margin:0;border:0}legend{float:left;width:100%;padding:0;margin-bottom:.5rem;font-size:calc(1.275rem + .3vw);line-height:inherit}@media (min-width:1200px){legend{font-size:1.5rem}}legend+*{clear:left}::-webkit-datetime-edit-day-field,::-webkit-datetime-edit-fields-wrapper,::-webkit-datetime-edit-hour-field,::-webkit-datetime-edit-minute,::-webkit-datetime-edit-month-field,::-webkit-datetime-edit-text,::-webkit-datetime-edit-year-field{padding:0}::-webkit-inner-spin-button{height:auto}[type=search]{outline-offset:-2px;-webkit-appearance:textfield}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-color-swatch-wrapper{padding:0}::file-selector-button{font:inherit}::-webkit-file-upload-button{font:inherit;-webkit-appearance:button}output{display:inline-block}iframe{border:0}summary{display:list-item;cursor:pointer}progress{vertical-align:baseline}[hidden]{display:none!important}</style>
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@ -107,99 +107,98 @@
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</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="n">referenced_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">})</span>
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</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="n">alias_count</span> <span class="o">=</span> <span class="n">source_column_alias_count</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
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</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a>
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</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"distinct"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">parent</span> <span class="ow">and</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">pivots</span><span class="p">):</span>
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</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="c1"># We can't remove columns SELECT DISTINCT nor UNION DISTINCT. The same holds if</span>
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</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="c1"># we select from a pivoted source in the parent scope.</span>
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</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span>
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</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a>
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</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span>
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</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span>
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</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
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</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a>
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</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">right</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
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</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
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</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">left</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
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</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span>
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</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="n">right</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span>
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</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">left</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span>
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</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">parent_selections</span>
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</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="p">]</span>
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</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a>
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</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
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</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="k">if</span> <span class="n">remove_unused_selections</span><span class="p">:</span>
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</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="n">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">alias_count</span><span class="p">)</span>
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</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a>
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</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span>
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</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="k">continue</span>
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</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a>
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</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="c1"># Group columns by source name</span>
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</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
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</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span>
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</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span>
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</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="n">col_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span>
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</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">col_name</span><span class="p">)</span>
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</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a>
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</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="c1"># Push the selected columns down to the next scope</span>
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</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
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</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</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>
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</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">set</span><span class="p">()</span>
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</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">source</span><span class="p">]</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span>
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</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a>
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</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="n">column_aliases</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">alias_column_names</span>
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</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="k">if</span> <span class="n">column_aliases</span><span class="p">:</span>
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</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="n">source_column_alias_count</span><span class="p">[</span><span class="n">source</span><span class="p">]</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">column_aliases</span><span class="p">)</span>
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</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a>
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</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="c1"># We can't remove columns SELECT DISTINCT nor UNION DISTINCT.</span>
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</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"distinct"</span><span class="p">):</span>
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</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span>
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</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a>
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</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span>
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</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span>
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</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
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</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a>
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</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">right</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
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</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
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</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">left</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
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</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span>
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</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="n">right</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span>
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</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">left</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span>
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||||
</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">parent_selections</span>
|
||||
</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="p">]</span>
|
||||
</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a>
|
||||
</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="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-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="k">if</span> <span class="n">remove_unused_selections</span><span class="p">:</span>
|
||||
</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="n">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">alias_count</span><span class="p">)</span>
|
||||
</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a>
|
||||
</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span>
|
||||
</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="k">continue</span>
|
||||
</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a>
|
||||
</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="c1"># Group columns by source name</span>
|
||||
</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
|
||||
</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span>
|
||||
</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span>
|
||||
</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="n">col_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span>
|
||||
</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">col_name</span><span class="p">)</span>
|
||||
</span><span id="L-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="c1"># Push the selected columns down to the next scope</span>
|
||||
</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
|
||||
</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span>
|
||||
</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span> <span class="k">else</span> <span class="n">selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">set</span><span class="p">()</span>
|
||||
</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">source</span><span class="p">]</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span>
|
||||
</span><span id="L-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">column_aliases</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">alias_column_names</span>
|
||||
</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="k">if</span> <span class="n">column_aliases</span><span class="p">:</span>
|
||||
</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="n">source_column_alias_count</span><span class="p">[</span><span class="n">source</span><span class="p">]</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">column_aliases</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">return</span> <span class="n">expression</span>
|
||||
</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a>
|
||||
</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a>
|
||||
</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a>
|
||||
</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a><span class="k">def</span> <span class="nf">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">alias_count</span><span class="p">):</span>
|
||||
</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</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-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="k">if</span> <span class="n">order</span><span class="p">:</span>
|
||||
</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="c1"># Assume columns without a qualified table are references to output columns</span>
|
||||
</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="n">order_refs</span> <span class="o">=</span> <span class="p">{</span><span class="n">c</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">order</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span><span class="p">}</span>
|
||||
</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="k">else</span><span class="p">:</span>
|
||||
</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="n">order_refs</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
|
||||
</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a>
|
||||
</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span>
|
||||
</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="n">removed</span> <span class="o">=</span> <span class="kc">False</span>
|
||||
</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="n">star</span> <span class="o">=</span> <span class="kc">False</span>
|
||||
</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="n">is_agg</span> <span class="o">=</span> <span class="kc">False</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">select_all</span> <span class="o">=</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span>
|
||||
</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a>
|
||||
</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="k">for</span> <span class="n">selection</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span>
|
||||
</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">selection</span><span class="o">.</span><span class="n">alias_or_name</span>
|
||||
</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a>
|
||||
</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="k">if</span> <span class="n">select_all</span> <span class="ow">or</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">order_refs</span> <span class="ow">or</span> <span class="n">alias_count</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
|
||||
</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">selection</span><span class="p">)</span>
|
||||
</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="n">alias_count</span> <span class="o">-=</span> <span class="mi">1</span>
|
||||
</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="k">else</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">selection</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span>
|
||||
</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="n">star</span> <span class="o">=</span> <span class="kc">True</span>
|
||||
</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="n">removed</span> <span class="o">=</span> <span class="kc">True</span>
|
||||
</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a>
|
||||
</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">is_agg</span> <span class="ow">and</span> <span class="n">selection</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">):</span>
|
||||
</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="n">is_agg</span> <span class="o">=</span> <span class="kc">True</span>
|
||||
</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a>
|
||||
</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="k">if</span> <span class="n">star</span><span class="p">:</span>
|
||||
</span><span id="L-122"><a href="#L-122"><span class="linenos">122</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-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="n">names</span> <span class="o">=</span> <span class="p">{</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">new_selections</span><span class="p">}</span>
|
||||
</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a>
|
||||
</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">parent_selections</span><span class="p">):</span>
|
||||
</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">names</span><span class="p">:</span>
|
||||
</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
|
||||
</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="n">alias</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">name</span><span class="p">)),</span> <span class="n">name</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
||||
</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="p">)</span>
|
||||
</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a>
|
||||
</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="c1"># If there are no remaining selections, just select a single constant</span>
|
||||
</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">new_selections</span><span class="p">:</span>
|
||||
</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">DEFAULT_SELECTION</span><span class="p">(</span><span class="n">is_agg</span><span class="p">))</span>
|
||||
</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a>
|
||||
</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">new_selections</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
||||
</span><span id="L-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">if</span> <span class="n">removed</span><span class="p">:</span>
|
||||
</span><span id="L-138"><a href="#L-138"><span class="linenos">138</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-90"><a href="#L-90"><span class="linenos"> 90</span></a><span class="k">def</span> <span class="nf">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">alias_count</span><span class="p">):</span>
|
||||
</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</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-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="k">if</span> <span class="n">order</span><span class="p">:</span>
|
||||
</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="c1"># Assume columns without a qualified table are references to output columns</span>
|
||||
</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="n">order_refs</span> <span class="o">=</span> <span class="p">{</span><span class="n">c</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">order</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span><span class="p">}</span>
|
||||
</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="k">else</span><span class="p">:</span>
|
||||
</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="n">order_refs</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
|
||||
</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a>
|
||||
</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span>
|
||||
</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="n">removed</span> <span class="o">=</span> <span class="kc">False</span>
|
||||
</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="n">star</span> <span class="o">=</span> <span class="kc">False</span>
|
||||
</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="n">is_agg</span> <span class="o">=</span> <span class="kc">False</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">select_all</span> <span class="o">=</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span>
|
||||
</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a>
|
||||
</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="k">for</span> <span class="n">selection</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span>
|
||||
</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">selection</span><span class="o">.</span><span class="n">alias_or_name</span>
|
||||
</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a>
|
||||
</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="k">if</span> <span class="n">select_all</span> <span class="ow">or</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">order_refs</span> <span class="ow">or</span> <span class="n">alias_count</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
|
||||
</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">selection</span><span class="p">)</span>
|
||||
</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="n">alias_count</span> <span class="o">-=</span> <span class="mi">1</span>
|
||||
</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="k">else</span><span class="p">:</span>
|
||||
</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="k">if</span> <span class="n">selection</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span>
|
||||
</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="n">star</span> <span class="o">=</span> <span class="kc">True</span>
|
||||
</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="n">removed</span> <span class="o">=</span> <span class="kc">True</span>
|
||||
</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a>
|
||||
</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">is_agg</span> <span class="ow">and</span> <span class="n">selection</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">):</span>
|
||||
</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="n">is_agg</span> <span class="o">=</span> <span class="kc">True</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="k">if</span> <span class="n">star</span><span class="p">:</span>
|
||||
</span><span id="L-121"><a href="#L-121"><span class="linenos">121</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-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="n">names</span> <span class="o">=</span> <span class="p">{</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">new_selections</span><span class="p">}</span>
|
||||
</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a>
|
||||
</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">parent_selections</span><span class="p">):</span>
|
||||
</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">names</span><span class="p">:</span>
|
||||
</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
|
||||
</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="n">alias</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">name</span><span class="p">)),</span> <span class="n">name</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
||||
</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <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"># If there are no remaining selections, just select a single constant</span>
|
||||
</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">new_selections</span><span class="p">:</span>
|
||||
</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">DEFAULT_SELECTION</span><span class="p">(</span><span class="n">is_agg</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">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">new_selections</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
||||
</span><span id="L-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">if</span> <span class="n">removed</span><span class="p">:</span>
|
||||
</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
|
@ -276,49 +275,48 @@
|
|||
</span><span id="pushdown_projections-44"><a href="#pushdown_projections-44"><span class="linenos">44</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="n">referenced_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">})</span>
|
||||
</span><span id="pushdown_projections-45"><a href="#pushdown_projections-45"><span class="linenos">45</span></a> <span class="n">alias_count</span> <span class="o">=</span> <span class="n">source_column_alias_count</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-46"><a href="#pushdown_projections-46"><span class="linenos">46</span></a>
|
||||
</span><span id="pushdown_projections-47"><a href="#pushdown_projections-47"><span class="linenos">47</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"distinct"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">parent</span> <span class="ow">and</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">pivots</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-48"><a href="#pushdown_projections-48"><span class="linenos">48</span></a> <span class="c1"># We can't remove columns SELECT DISTINCT nor UNION DISTINCT. The same holds if</span>
|
||||
</span><span id="pushdown_projections-49"><a href="#pushdown_projections-49"><span class="linenos">49</span></a> <span class="c1"># we select from a pivoted source in the parent scope.</span>
|
||||
</span><span id="pushdown_projections-50"><a href="#pushdown_projections-50"><span class="linenos">50</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span>
|
||||
</span><span id="pushdown_projections-51"><a href="#pushdown_projections-51"><span class="linenos">51</span></a>
|
||||
</span><span id="pushdown_projections-52"><a href="#pushdown_projections-52"><span class="linenos">52</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-53"><a href="#pushdown_projections-53"><span class="linenos">53</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span>
|
||||
</span><span id="pushdown_projections-54"><a href="#pushdown_projections-54"><span class="linenos">54</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
|
||||
</span><span id="pushdown_projections-55"><a href="#pushdown_projections-55"><span class="linenos">55</span></a>
|
||||
</span><span id="pushdown_projections-56"><a href="#pushdown_projections-56"><span class="linenos">56</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">right</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-57"><a href="#pushdown_projections-57"><span class="linenos">57</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
|
||||
</span><span id="pushdown_projections-58"><a href="#pushdown_projections-58"><span class="linenos">58</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">left</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-59"><a href="#pushdown_projections-59"><span class="linenos">59</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span>
|
||||
</span><span id="pushdown_projections-60"><a href="#pushdown_projections-60"><span class="linenos">60</span></a> <span class="n">right</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span>
|
||||
</span><span id="pushdown_projections-61"><a href="#pushdown_projections-61"><span class="linenos">61</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">left</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-62"><a href="#pushdown_projections-62"><span class="linenos">62</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">parent_selections</span>
|
||||
</span><span id="pushdown_projections-63"><a href="#pushdown_projections-63"><span class="linenos">63</span></a> <span class="p">]</span>
|
||||
</span><span id="pushdown_projections-64"><a href="#pushdown_projections-64"><span class="linenos">64</span></a>
|
||||
</span><span id="pushdown_projections-65"><a href="#pushdown_projections-65"><span class="linenos">65</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-66"><a href="#pushdown_projections-66"><span class="linenos">66</span></a> <span class="k">if</span> <span class="n">remove_unused_selections</span><span class="p">:</span>
|
||||
</span><span id="pushdown_projections-67"><a href="#pushdown_projections-67"><span class="linenos">67</span></a> <span class="n">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">alias_count</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-68"><a href="#pushdown_projections-68"><span class="linenos">68</span></a>
|
||||
</span><span id="pushdown_projections-69"><a href="#pushdown_projections-69"><span class="linenos">69</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span>
|
||||
</span><span id="pushdown_projections-70"><a href="#pushdown_projections-70"><span class="linenos">70</span></a> <span class="k">continue</span>
|
||||
</span><span id="pushdown_projections-71"><a href="#pushdown_projections-71"><span class="linenos">71</span></a>
|
||||
</span><span id="pushdown_projections-72"><a href="#pushdown_projections-72"><span class="linenos">72</span></a> <span class="c1"># Group columns by source name</span>
|
||||
</span><span id="pushdown_projections-73"><a href="#pushdown_projections-73"><span class="linenos">73</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-74"><a href="#pushdown_projections-74"><span class="linenos">74</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span>
|
||||
</span><span id="pushdown_projections-75"><a href="#pushdown_projections-75"><span class="linenos">75</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span>
|
||||
</span><span id="pushdown_projections-76"><a href="#pushdown_projections-76"><span class="linenos">76</span></a> <span class="n">col_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span>
|
||||
</span><span id="pushdown_projections-77"><a href="#pushdown_projections-77"><span class="linenos">77</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">col_name</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-78"><a href="#pushdown_projections-78"><span class="linenos">78</span></a>
|
||||
</span><span id="pushdown_projections-79"><a href="#pushdown_projections-79"><span class="linenos">79</span></a> <span class="c1"># Push the selected columns down to the next scope</span>
|
||||
</span><span id="pushdown_projections-80"><a href="#pushdown_projections-80"><span class="linenos">80</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
|
||||
</span><span id="pushdown_projections-81"><a href="#pushdown_projections-81"><span class="linenos">81</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-82"><a href="#pushdown_projections-82"><span class="linenos">82</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">set</span><span class="p">()</span>
|
||||
</span><span id="pushdown_projections-83"><a href="#pushdown_projections-83"><span class="linenos">83</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">source</span><span class="p">]</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-84"><a href="#pushdown_projections-84"><span class="linenos">84</span></a>
|
||||
</span><span id="pushdown_projections-85"><a href="#pushdown_projections-85"><span class="linenos">85</span></a> <span class="n">column_aliases</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">alias_column_names</span>
|
||||
</span><span id="pushdown_projections-86"><a href="#pushdown_projections-86"><span class="linenos">86</span></a> <span class="k">if</span> <span class="n">column_aliases</span><span class="p">:</span>
|
||||
</span><span id="pushdown_projections-87"><a href="#pushdown_projections-87"><span class="linenos">87</span></a> <span class="n">source_column_alias_count</span><span class="p">[</span><span class="n">source</span><span class="p">]</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">column_aliases</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-88"><a href="#pushdown_projections-88"><span class="linenos">88</span></a>
|
||||
</span><span id="pushdown_projections-89"><a href="#pushdown_projections-89"><span class="linenos">89</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span><span id="pushdown_projections-47"><a href="#pushdown_projections-47"><span class="linenos">47</span></a> <span class="c1"># We can't remove columns SELECT DISTINCT nor UNION DISTINCT.</span>
|
||||
</span><span id="pushdown_projections-48"><a href="#pushdown_projections-48"><span class="linenos">48</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"distinct"</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-49"><a href="#pushdown_projections-49"><span class="linenos">49</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span>
|
||||
</span><span id="pushdown_projections-50"><a href="#pushdown_projections-50"><span class="linenos">50</span></a>
|
||||
</span><span id="pushdown_projections-51"><a href="#pushdown_projections-51"><span class="linenos">51</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-52"><a href="#pushdown_projections-52"><span class="linenos">52</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span>
|
||||
</span><span id="pushdown_projections-53"><a href="#pushdown_projections-53"><span class="linenos">53</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
|
||||
</span><span id="pushdown_projections-54"><a href="#pushdown_projections-54"><span class="linenos">54</span></a>
|
||||
</span><span id="pushdown_projections-55"><a href="#pushdown_projections-55"><span class="linenos">55</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">right</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-56"><a href="#pushdown_projections-56"><span class="linenos">56</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span>
|
||||
</span><span id="pushdown_projections-57"><a href="#pushdown_projections-57"><span class="linenos">57</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">left</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-58"><a href="#pushdown_projections-58"><span class="linenos">58</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span>
|
||||
</span><span id="pushdown_projections-59"><a href="#pushdown_projections-59"><span class="linenos">59</span></a> <span class="n">right</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span>
|
||||
</span><span id="pushdown_projections-60"><a href="#pushdown_projections-60"><span class="linenos">60</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">left</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-61"><a href="#pushdown_projections-61"><span class="linenos">61</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">parent_selections</span>
|
||||
</span><span id="pushdown_projections-62"><a href="#pushdown_projections-62"><span class="linenos">62</span></a> <span class="p">]</span>
|
||||
</span><span id="pushdown_projections-63"><a href="#pushdown_projections-63"><span class="linenos">63</span></a>
|
||||
</span><span id="pushdown_projections-64"><a href="#pushdown_projections-64"><span class="linenos">64</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-65"><a href="#pushdown_projections-65"><span class="linenos">65</span></a> <span class="k">if</span> <span class="n">remove_unused_selections</span><span class="p">:</span>
|
||||
</span><span id="pushdown_projections-66"><a href="#pushdown_projections-66"><span class="linenos">66</span></a> <span class="n">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">alias_count</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-67"><a href="#pushdown_projections-67"><span class="linenos">67</span></a>
|
||||
</span><span id="pushdown_projections-68"><a href="#pushdown_projections-68"><span class="linenos">68</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span>
|
||||
</span><span id="pushdown_projections-69"><a href="#pushdown_projections-69"><span class="linenos">69</span></a> <span class="k">continue</span>
|
||||
</span><span id="pushdown_projections-70"><a href="#pushdown_projections-70"><span class="linenos">70</span></a>
|
||||
</span><span id="pushdown_projections-71"><a href="#pushdown_projections-71"><span class="linenos">71</span></a> <span class="c1"># Group columns by source name</span>
|
||||
</span><span id="pushdown_projections-72"><a href="#pushdown_projections-72"><span class="linenos">72</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-73"><a href="#pushdown_projections-73"><span class="linenos">73</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span>
|
||||
</span><span id="pushdown_projections-74"><a href="#pushdown_projections-74"><span class="linenos">74</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span>
|
||||
</span><span id="pushdown_projections-75"><a href="#pushdown_projections-75"><span class="linenos">75</span></a> <span class="n">col_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span>
|
||||
</span><span id="pushdown_projections-76"><a href="#pushdown_projections-76"><span class="linenos">76</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">col_name</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-77"><a href="#pushdown_projections-77"><span class="linenos">77</span></a>
|
||||
</span><span id="pushdown_projections-78"><a href="#pushdown_projections-78"><span class="linenos">78</span></a> <span class="c1"># Push the selected columns down to the next scope</span>
|
||||
</span><span id="pushdown_projections-79"><a href="#pushdown_projections-79"><span class="linenos">79</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
|
||||
</span><span id="pushdown_projections-80"><a href="#pushdown_projections-80"><span class="linenos">80</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span>
|
||||
</span><span id="pushdown_projections-81"><a href="#pushdown_projections-81"><span class="linenos">81</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span> <span class="k">else</span> <span class="n">selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">set</span><span class="p">()</span>
|
||||
</span><span id="pushdown_projections-82"><a href="#pushdown_projections-82"><span class="linenos">82</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">source</span><span class="p">]</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-83"><a href="#pushdown_projections-83"><span class="linenos">83</span></a>
|
||||
</span><span id="pushdown_projections-84"><a href="#pushdown_projections-84"><span class="linenos">84</span></a> <span class="n">column_aliases</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">alias_column_names</span>
|
||||
</span><span id="pushdown_projections-85"><a href="#pushdown_projections-85"><span class="linenos">85</span></a> <span class="k">if</span> <span class="n">column_aliases</span><span class="p">:</span>
|
||||
</span><span id="pushdown_projections-86"><a href="#pushdown_projections-86"><span class="linenos">86</span></a> <span class="n">source_column_alias_count</span><span class="p">[</span><span class="n">source</span><span class="p">]</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">column_aliases</span><span class="p">)</span>
|
||||
</span><span id="pushdown_projections-87"><a href="#pushdown_projections-87"><span class="linenos">87</span></a>
|
||||
</span><span id="pushdown_projections-88"><a href="#pushdown_projections-88"><span class="linenos">88</span></a> <span class="k">return</span> <span class="n">expression</span>
|
||||
</span></pre></div>
|
||||
|
||||
|
||||
|
|
|
|||
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Add table
Add a link
Reference in a new issue