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200ms;filter:grayscale(100%);}.pdoc .attribution:hover{opacity:1;filter:grayscale(0%);}.pdoc .attribution img{margin-left:5px;height:35px;vertical-align:middle;width:70px;transition:all 200ms;}.pdoc table{display:block;width:max-content;max-width:100%;overflow:auto;margin-bottom:1rem;}.pdoc table th{font-weight:600;}.pdoc table th, .pdoc table td{padding:6px 13px;border:1px solid var(--accent2);}</style> + <style>/*! custom.css */</style></head> +<body> + <nav class="pdoc"> + <label id="navtoggle" for="togglestate" class="pdoc-button"><svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'><path stroke-linecap='round' stroke="currentColor" stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/></svg></label> + <input id="togglestate" type="checkbox" aria-hidden="true" tabindex="-1"> + <div> <a class="pdoc-button module-list-button" href="../sqlglot.html"> +<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-box-arrow-in-left" viewBox="0 0 16 16"> + <path fill-rule="evenodd" d="M10 3.5a.5.5 0 0 0-.5-.5h-8a.5.5 0 0 0-.5.5v9a.5.5 0 0 0 .5.5h8a.5.5 0 0 0 .5-.5v-2a.5.5 0 0 1 1 0v2A1.5 1.5 0 0 1 9.5 14h-8A1.5 1.5 0 0 1 0 12.5v-9A1.5 1.5 0 0 1 1.5 2h8A1.5 1.5 0 0 1 11 3.5v2a.5.5 0 0 1-1 0v-2z"/> + <path fill-rule="evenodd" d="M4.146 8.354a.5.5 0 0 1 0-.708l3-3a.5.5 0 1 1 .708.708L5.707 7.5H14.5a.5.5 0 0 1 0 1H5.707l2.147 2.146a.5.5 0 0 1-.708.708l-3-3z"/> +</svg> sqlglot</a> + + + <input type="search" placeholder="Search..." role="searchbox" aria-label="search" + pattern=".+" required> + + + + <h2>API Documentation</h2> + <ul class="memberlist"> + <li> + <a class="class" href="#Schema">Schema</a> + <ul class="memberlist"> + <li> + <a class="function" href="#Schema.add_table">add_table</a> + </li> + <li> + <a class="function" href="#Schema.column_names">column_names</a> + </li> + <li> + <a class="function" href="#Schema.get_column_type">get_column_type</a> + </li> + <li> + <a class="variable" href="#Schema.supported_table_args">supported_table_args</a> + </li> + </ul> + + </li> + <li> + <a class="class" href="#AbstractMappingSchema">AbstractMappingSchema</a> + <ul class="memberlist"> + <li> + <a class="function" href="#AbstractMappingSchema.__init__">AbstractMappingSchema</a> + </li> + <li> + <a class="function" href="#AbstractMappingSchema.table_parts">table_parts</a> + </li> + <li> + <a class="function" href="#AbstractMappingSchema.find">find</a> + </li> + </ul> + + </li> + <li> + <a class="class" href="#MappingSchema">MappingSchema</a> + <ul class="memberlist"> + <li> + <a class="function" href="#MappingSchema.__init__">MappingSchema</a> + </li> + <li> + <a class="function" href="#MappingSchema.from_mapping_schema">from_mapping_schema</a> + </li> + <li> + <a class="function" href="#MappingSchema.copy">copy</a> + </li> + <li> + <a class="function" href="#MappingSchema.add_table">add_table</a> + </li> + <li> + <a class="function" href="#MappingSchema.column_names">column_names</a> + </li> + <li> + <a class="function" href="#MappingSchema.get_column_type">get_column_type</a> + </li> + </ul> + + </li> + <li> + <a class="function" href="#ensure_schema">ensure_schema</a> + </li> + <li> + <a class="function" href="#ensure_column_mapping">ensure_column_mapping</a> + </li> + <li> + <a class="function" href="#flatten_schema">flatten_schema</a> + </li> + </ul> + + + <footer>Copyright (c) 2023 Toby Mao</footer> + + <a class="attribution" title="pdoc: Python API documentation generator" href="https://pdoc.dev" target="_blank"> + built with <span class="visually-hidden">pdoc</span><img + alt="pdoc logo" + 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+ </a> +</div> + </nav> + <main class="pdoc"> + <section class="module-info"> + <a class="pdoc-button git-button" href="https://github.com/tobymao/sqlglot/tree/main/sqlglot/schema.py">Edit on GitHub</a> + <h1 class="modulename"> +<a href="./../sqlglot.html">sqlglot</a><wbr>.schema </h1> + + + <input id="mod-schema-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> + + <label class="view-source-button" for="mod-schema-view-source"><span>View Source</span></label> + + <div class="pdoc-code codehilite"><pre><span></span><span id="L-1"><a href="#L-1"><span class="linenos"> 1</span></a><span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">annotations</span> +</span><span id="L-2"><a href="#L-2"><span class="linenos"> 2</span></a> +</span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a><span class="kn">import</span> <span class="nn">abc</span> +</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a><span class="kn">import</span> <span class="nn">typing</span> <span class="k">as</span> <span class="nn">t</span> +</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a> +</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="kn">import</span> <span class="nn">sqlglot</span> +</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">expressions</span> <span class="k">as</span> <span class="n">exp</span> +</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="kn">from</span> <span class="nn">sqlglot.errors</span> <span class="kn">import</span> <span class="n">SchemaError</span> +</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="kn">from</span> <span class="nn">sqlglot.helper</span> <span class="kn">import</span> <span class="n">dict_depth</span> +</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a><span class="kn">from</span> <span class="nn">sqlglot.trie</span> <span class="kn">import</span> <span class="n">in_trie</span><span class="p">,</span> <span class="n">new_trie</span> +</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a> +</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a><span class="k">if</span> <span class="n">t</span><span class="o">.</span><span class="n">TYPE_CHECKING</span><span class="p">:</span> +</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a> <span class="kn">from</span> <span class="nn">sqlglot.dataframe.sql.types</span> <span class="kn">import</span> <span class="n">StructType</span> +</span><span id="L-14"><a href="#L-14"><span class="linenos"> 14</span></a> <span class="kn">from</span> <span class="nn">sqlglot.dialects.dialect</span> <span class="kn">import</span> <span class="n">DialectType</span> +</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a> +</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a> <span class="n">ColumnMapping</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">Union</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">,</span> <span class="nb">str</span><span class="p">,</span> <span class="n">StructType</span><span class="p">,</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">]</span> +</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a> +</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="n">TABLE_ARGS</span> <span class="o">=</span> <span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="s2">"db"</span><span class="p">,</span> <span class="s2">"catalog"</span><span class="p">)</span> +</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a> +</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="n">T</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">TypeVar</span><span class="p">(</span><span class="s2">"T"</span><span class="p">)</span> +</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a> +</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a> +</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="k">class</span> <span class="nc">Schema</span><span class="p">(</span><span class="n">abc</span><span class="o">.</span><span class="n">ABC</span><span class="p">):</span> +</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="w"> </span><span class="sd">"""Abstract base class for database schemas"""</span> +</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a> +</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span> +</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a> <span class="k">def</span> <span class="nf">add_table</span><span class="p">(</span> +</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">column_mapping</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">ColumnMapping</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a><span class="sd"> Register or update a table. Some implementing classes may require column information to also be provided.</span> +</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> +</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a><span class="sd"> Args:</span> +</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a><span class="sd"> table: table expression instance or string representing the table.</span> +</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a><span class="sd"> column_mapping: a column mapping that describes the structure of the table.</span> +</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a><span class="sd"> """</span> +</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> +</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span> +</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> <span class="k">def</span> <span class="nf">column_names</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> +</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a><span class="sd"> Get the column names for a table.</span> +</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> +</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a><span class="sd"> Args:</span> +</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a><span class="sd"> table: the `Table` expression instance.</span> +</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a><span class="sd"> only_visible: whether to include invisible columns.</span> +</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> +</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a><span class="sd"> Returns:</span> +</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a><span class="sd"> The list of column names.</span> +</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a><span class="sd"> """</span> +</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> +</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="k">def</span> <span class="nf">get_column_type</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">column</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="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">:</span> +</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a><span class="sd"> Get the :class:`sqlglot.exp.DataType` type of a column in the schema.</span> +</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> +</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a><span class="sd"> Args:</span> +</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a><span class="sd"> table: the source table.</span> +</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a><span class="sd"> column: the target column.</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> +</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a><span class="sd"> Returns:</span> +</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a><span class="sd"> The resulting column type.</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><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="nd">@property</span> +</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="k">def</span> <span class="nf">supported_table_args</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="o">...</span><span class="p">]:</span> +</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a><span class="sd"> Table arguments this schema support, e.g. `("this", "db", "catalog")`</span> +</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a><span class="sd"> """</span> +</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="k">raise</span> <span class="ne">NotImplementedError</span> +</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> +</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> +</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a><span class="k">class</span> <span class="nc">AbstractMappingSchema</span><span class="p">(</span><span class="n">t</span><span class="o">.</span><span class="n">Generic</span><span class="p">[</span><span class="n">T</span><span class="p">]):</span> +</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="bp">self</span><span class="p">,</span> +</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="n">mapping</span><span class="p">:</span> <span class="nb">dict</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span> <span class="o">=</span> <span class="n">mapping</span> <span class="ow">or</span> <span class="p">{}</span> +</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">mapping_trie</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_build_trie</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">)</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_supported_table_args</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="o">...</span><span class="p">]</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">()</span> +</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> +</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="k">def</span> <span class="nf">_build_trie</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">:</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="k">return</span> <span class="n">new_trie</span><span class="p">(</span><span class="nb">tuple</span><span class="p">(</span><span class="nb">reversed</span><span class="p">(</span><span class="n">t</span><span class="p">))</span> <span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="n">flatten_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">,</span> <span class="n">depth</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_depth</span><span class="p">()))</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="k">def</span> <span class="nf">_depth</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="k">return</span> <span class="n">dict_depth</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mapping</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="nd">@property</span> +</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="k">def</span> <span class="nf">supported_table_args</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="o">...</span><span class="p">]:</span> +</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_supported_table_args</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">:</span> +</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="n">depth</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_depth</span><span class="p">()</span> +</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> +</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">depth</span><span class="p">:</span> <span class="c1"># None</span> +</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_supported_table_args</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">()</span> +</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="k">elif</span> <span class="mi">1</span> <span class="o"><=</span> <span class="n">depth</span> <span class="o"><=</span> <span class="mi">3</span><span class="p">:</span> +</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_supported_table_args</span> <span class="o">=</span> <span class="n">TABLE_ARGS</span><span class="p">[:</span><span class="n">depth</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="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Invalid mapping shape. Depth: </span><span class="si">{</span><span class="n">depth</span><span class="si">}</span><span class="s2">"</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="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_supported_table_args</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">def</span> <span class="nf">table_parts</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> +</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">table</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span> +</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">table</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">name</span><span class="p">]</span> +</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">table</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="n">part</span><span class="p">)</span> <span class="k">for</span> <span class="n">part</span> <span class="ow">in</span> <span class="n">TABLE_ARGS</span> <span class="k">if</span> <span class="n">table</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="n">part</span><span class="p">)]</span> +</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> +</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="k">def</span> <span class="nf">find</span><span class="p">(</span> +</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">,</span> <span class="n">trie</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span> +</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <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="n">T</span><span class="p">]:</span> +</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="n">parts</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">table_parts</span><span class="p">(</span><span class="n">table</span><span class="p">)[</span><span class="mi">0</span> <span class="p">:</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">supported_table_args</span><span class="p">)]</span> +</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="n">value</span><span class="p">,</span> <span class="n">trie</span> <span class="o">=</span> <span class="n">in_trie</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mapping_trie</span> <span class="k">if</span> <span class="n">trie</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">trie</span><span class="p">,</span> <span class="n">parts</span><span class="p">)</span> +</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> +</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="k">if</span> <span class="n">value</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span> +</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="k">elif</span> <span class="n">value</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="n">possibilities</span> <span class="o">=</span> <span class="n">flatten_schema</span><span class="p">(</span><span class="n">trie</span><span class="p">,</span> <span class="n">depth</span><span class="o">=</span><span class="n">dict_depth</span><span class="p">(</span><span class="n">trie</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</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="nb">len</span><span class="p">(</span><span class="n">possibilities</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="n">parts</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">possibilities</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> +</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="n">message</span> <span class="o">=</span> <span class="s2">", "</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="s2">"."</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">parts</span><span class="p">)</span> <span class="k">for</span> <span class="n">parts</span> <span class="ow">in</span> <span class="n">possibilities</span><span class="p">)</span> +</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="k">if</span> <span class="n">raise_on_missing</span><span class="p">:</span> +</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous mapping for </span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2">: </span><span class="si">{</span><span class="n">message</span><span class="si">}</span><span class="s2">."</span><span class="p">)</span> +</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_nested_get</span><span class="p">(</span><span class="n">parts</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="o">=</span><span class="n">raise_on_missing</span><span class="p">)</span> +</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> +</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="k">def</span> <span class="nf">_nested_get</span><span class="p">(</span> +</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">parts</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> <span class="n">d</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="o">=</span><span class="kc">True</span> +</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <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="n">t</span><span class="o">.</span><span class="n">Any</span><span class="p">]:</span> +</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="k">return</span> <span class="n">_nested_get</span><span class="p">(</span> +</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="n">d</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">,</span> +</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="o">*</span><span class="nb">zip</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">supported_table_args</span><span class="p">,</span> <span class="nb">reversed</span><span class="p">(</span><span class="n">parts</span><span class="p">)),</span> +</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="n">raise_on_missing</span><span class="o">=</span><span class="n">raise_on_missing</span><span class="p">,</span> +</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <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><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a><span class="k">class</span> <span class="nc">MappingSchema</span><span class="p">(</span><span class="n">AbstractMappingSchema</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]],</span> <span class="n">Schema</span><span class="p">):</span> +</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a><span class="sd"> Schema based on a nested mapping.</span> +</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> +</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a><span class="sd"> Args:</span> +</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a><span class="sd"> schema (dict): Mapping in one of the following forms:</span> +</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a><span class="sd"> 1. {table: {col: type}}</span> +</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a><span class="sd"> 2. {db: {table: {col: type}}}</span> +</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a><span class="sd"> 3. {catalog: {db: {table: {col: type}}}}</span> +</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a><span class="sd"> 4. None - Tables will be added later</span> +</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a><span class="sd"> visible (dict): Optional mapping of which columns in the schema are visible. If not provided, all columns</span> +</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a><span class="sd"> are assumed to be visible. The nesting should mirror that of the schema:</span> +</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a><span class="sd"> 1. {table: set(*cols)}}</span> +</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a><span class="sd"> 2. {db: {table: set(*cols)}}}</span> +</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a><span class="sd"> 3. {catalog: {db: {table: set(*cols)}}}}</span> +</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a><span class="sd"> dialect (str): The dialect to be used for custom type mappings.</span> +</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a><span class="sd"> """</span> +</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> +</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> +</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="bp">self</span><span class="p">,</span> +</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="n">visible</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="n">dialect</span><span class="p">:</span> <span class="n">DialectType</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">dialect</span> <span class="o">=</span> <span class="n">dialect</span> +</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">visible</span> <span class="o">=</span> <span class="n">visible</span> <span class="ow">or</span> <span class="p">{}</span> +</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_type_mapping_cache</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_normalize</span><span class="p">(</span><span class="n">schema</span> <span class="ow">or</span> <span class="p">{}))</span> +</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> +</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> <span class="nd">@classmethod</span> +</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="k">def</span> <span class="nf">from_mapping_schema</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">mapping_schema</span><span class="p">:</span> <span class="n">MappingSchema</span><span class="p">)</span> <span class="o">-></span> <span class="n">MappingSchema</span><span class="p">:</span> +</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="k">return</span> <span class="n">MappingSchema</span><span class="p">(</span> +</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="n">schema</span><span class="o">=</span><span class="n">mapping_schema</span><span class="o">.</span><span class="n">mapping</span><span class="p">,</span> +</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a> <span class="n">visible</span><span class="o">=</span><span class="n">mapping_schema</span><span class="o">.</span><span class="n">visible</span><span class="p">,</span> +</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="n">dialect</span><span class="o">=</span><span class="n">mapping_schema</span><span class="o">.</span><span class="n">dialect</span><span class="p">,</span> +</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> <span class="p">)</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="k">def</span> <span class="nf">copy</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> <span class="o">-></span> <span class="n">MappingSchema</span><span class="p">:</span> +</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="k">return</span> <span class="n">MappingSchema</span><span class="p">(</span> +</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="o">**</span><span class="p">{</span> <span class="c1"># type: ignore</span> +</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="s2">"schema"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> +</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="s2">"visible"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">visible</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> +</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="s2">"dialect"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">dialect</span><span class="p">,</span> +</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> +</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="p">}</span> +</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="p">)</span> +</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> +</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="k">def</span> <span class="nf">_normalize</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">:</span> +</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a><span class="sd"> Converts all identifiers in the schema into lowercase, unless they're quoted.</span> +</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> +</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a><span class="sd"> Args:</span> +</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a><span class="sd"> schema: the schema to normalize.</span> +</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> +</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a><span class="sd"> Returns:</span> +</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a><span class="sd"> The normalized schema mapping.</span> +</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a><span class="sd"> """</span> +</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="n">flattened_schema</span> <span class="o">=</span> <span class="n">flatten_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">,</span> <span class="n">depth</span><span class="o">=</span><span class="n">dict_depth</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">)</span> +</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> +</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="n">normalized_mapping</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="k">for</span> <span class="n">keys</span> <span class="ow">in</span> <span class="n">flattened_schema</span><span class="p">:</span> +</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">_nested_get</span><span class="p">(</span><span class="n">schema</span><span class="p">,</span> <span class="o">*</span><span class="nb">zip</span><span class="p">(</span><span class="n">keys</span><span class="p">,</span> <span class="n">keys</span><span class="p">))</span> +</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a> <span class="k">assert</span> <span class="n">columns</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> +</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="n">normalized_keys</span> <span class="o">=</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_normalize_name</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">]</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_name</span><span class="p">,</span> <span class="n">column_type</span> <span class="ow">in</span> <span class="n">columns</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> <span class="n">_nested_set</span><span class="p">(</span> +</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> <span class="n">normalized_mapping</span><span class="p">,</span> +</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="n">normalized_keys</span> <span class="o">+</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_normalize_name</span><span class="p">(</span><span class="n">column_name</span><span class="p">)],</span> +</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> <span class="n">column_type</span><span class="p">,</span> +</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> <span class="p">)</span> +</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> +</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="k">return</span> <span class="n">normalized_mapping</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">def</span> <span class="nf">add_table</span><span class="p">(</span> +</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">column_mapping</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">ColumnMapping</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a><span class="sd"> Register or update a table. Updates are only performed if a new column mapping is provided.</span> +</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> +</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a><span class="sd"> Args:</span> +</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a><span class="sd"> table: the `Table` expression instance or string representing the table.</span> +</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a><span class="sd"> column_mapping: a column mapping that describes the structure of the table.</span> +</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a><span class="sd"> """</span> +</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> <span class="n">table_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_table</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> <span class="n">column_mapping</span> <span class="o">=</span> <span class="n">ensure_column_mapping</span><span class="p">(</span><span class="n">column_mapping</span><span class="p">)</span> +</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">table_</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a> +</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a> <span class="k">if</span> <span class="n">schema</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">column_mapping</span><span class="p">:</span> +</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a> <span class="k">return</span> +</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> +</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a> <span class="n">_nested_set</span><span class="p">(</span> +</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">,</span> +</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a> <span class="nb">list</span><span class="p">(</span><span class="nb">reversed</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">table_parts</span><span class="p">(</span><span class="n">table_</span><span class="p">))),</span> +</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a> <span class="n">column_mapping</span><span class="p">,</span> +</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a> <span class="p">)</span> +</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">mapping_trie</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_build_trie</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">)</span> +</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> +</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> <span class="k">def</span> <span class="nf">_normalize_name</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="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> +</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="n">identifier</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]</span> <span class="o">=</span> <span class="n">sqlglot</span><span class="o">.</span><span class="n">parse_one</span><span class="p">(</span> +</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a> <span class="n">name</span><span class="p">,</span> <span class="n">read</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">dialect</span><span class="p">,</span> <span class="n">into</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span> +</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a> <span class="p">)</span> +</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a> <span class="k">except</span><span class="p">:</span> +</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">)</span> +</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> +</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="k">if</span> <span class="n">identifier</span><span class="o">.</span><span class="n">quoted</span><span class="p">:</span> +</span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> <span class="k">return</span> <span class="n">identifier</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a> <span class="k">return</span> <span class="n">identifier</span><span class="o">.</span><span class="n">name</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> +</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a> +</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a> <span class="k">def</span> <span class="nf">_depth</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span> +</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a> <span class="c1"># The columns themselves are a mapping, but we don't want to include those</span> +</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a> <span class="k">return</span> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="n">_depth</span><span class="p">()</span> <span class="o">-</span> <span class="mi">1</span> +</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a> +</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a> <span class="k">def</span> <span class="nf">_ensure_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">:</span> +</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a> <span class="n">table_</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_table</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a> +</span><span id="L-253"><a href="#L-253"><span class="linenos">253</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-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Not a valid 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-255"><a href="#L-255"><span class="linenos">255</span></a> +</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="k">return</span> <span class="n">table_</span> +</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> +</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="k">def</span> <span class="nf">column_names</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> +</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> <span class="n">table_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_table</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">table_</span><span class="p">)</span> +</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> +</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="k">if</span> <span class="n">schema</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="k">return</span> <span class="p">[]</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">if</span> <span class="ow">not</span> <span class="n">only_visible</span> <span class="ow">or</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">visible</span><span class="p">:</span> +</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="k">return</span> <span class="nb">list</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> +</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> +</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="n">visible</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_nested_get</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">table_parts</span><span class="p">(</span><span class="n">table_</span><span class="p">),</span> <span class="bp">self</span><span class="o">.</span><span class="n">visible</span><span class="p">)</span> +</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">col</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">schema</span> <span class="k">if</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">visible</span><span class="p">]</span> <span class="c1"># type: ignore</span> +</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> +</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="k">def</span> <span class="nf">get_column_type</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">column</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span> <span class="o">|</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">:</span> +</span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> <span class="n">column_name</span> <span class="o">=</span> <span class="n">column</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="nb">str</span><span class="p">)</span> <span class="k">else</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="n">table_</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_table</span><span class="p">(</span><span class="n">table</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">table_</span><span class="p">:</span> +</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> <span class="n">table_schema</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">table_</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> <span class="k">if</span> <span class="n">table_schema</span><span class="p">:</span> +</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a> <span class="n">column_type</span> <span class="o">=</span> <span class="n">table_schema</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="L-278"><a href="#L-278"><span class="linenos">278</span></a> +</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column_type</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">):</span> +</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a> <span class="k">return</span> <span class="n">column_type</span> +</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column_type</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span> +</span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_to_data_type</span><span class="p">(</span><span class="n">column_type</span><span class="o">.</span><span class="n">upper</span><span class="p">())</span> +</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown column type '</span><span class="si">{</span><span class="n">column_type</span><span class="si">}</span><span class="s2">'"</span><span class="p">)</span> +</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</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">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">UNKNOWN</span><span class="p">)</span> +</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Could not convert 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-286"><a href="#L-286"><span class="linenos">286</span></a> +</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a> <span class="k">def</span> <span class="nf">_to_data_type</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">schema_type</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">:</span> +</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a><span class="sd"> Convert a type represented as a string to the corresponding :class:`sqlglot.exp.DataType` object.</span> +</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a> +</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a><span class="sd"> Args:</span> +</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a><span class="sd"> schema_type: the type we want to convert.</span> +</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> +</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a><span class="sd"> Returns:</span> +</span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a><span class="sd"> The resulting expression type.</span> +</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a><span class="sd"> """</span> +</span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> <span class="k">if</span> <span class="n">schema_type</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_type_mapping_cache</span><span class="p">:</span> +</span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">maybe_parse</span><span class="p">(</span><span class="n">schema_type</span><span class="p">,</span> <span class="n">into</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">,</span> <span class="n">dialect</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">dialect</span><span class="p">)</span> +</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> <span class="k">if</span> <span class="n">expression</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Could not parse </span><span class="si">{</span><span class="n">schema_type</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_type_mapping_cache</span><span class="p">[</span><span class="n">schema_type</span><span class="p">]</span> <span class="o">=</span> <span class="n">expression</span> <span class="c1"># type: ignore</span> +</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a> <span class="k">except</span> <span class="ne">AttributeError</span><span class="p">:</span> +</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Failed to convert type </span><span class="si">{</span><span class="n">schema_type</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a> +</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_type_mapping_cache</span><span class="p">[</span><span class="n">schema_type</span><span class="p">]</span> +</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a> +</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a> +</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a><span class="k">def</span> <span class="nf">ensure_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Any</span><span class="p">)</span> <span class="o">-></span> <span class="n">Schema</span><span class="p">:</span> +</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">schema</span><span class="p">,</span> <span class="n">Schema</span><span class="p">):</span> +</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a> <span class="k">return</span> <span class="n">schema</span> +</span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a> +</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> <span class="k">return</span> <span class="n">MappingSchema</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> +</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> +</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> +</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a><span class="k">def</span> <span class="nf">ensure_column_mapping</span><span class="p">(</span><span class="n">mapping</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">ColumnMapping</span><span class="p">]):</span> +</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">mapping</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span> +</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> <span class="k">return</span> <span class="n">mapping</span> +</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">mapping</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span> +</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="n">col_name_type_strs</span> <span class="o">=</span> <span class="p">[</span><span class="n">x</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">mapping</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">","</span><span class="p">)]</span> +</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="k">return</span> <span class="p">{</span> +</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> <span class="n">name_type_str</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">":"</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">strip</span><span class="p">():</span> <span class="n">name_type_str</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">":"</span><span class="p">)[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span> +</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> <span class="k">for</span> <span class="n">name_type_str</span> <span class="ow">in</span> <span class="n">col_name_type_strs</span> +</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a> <span class="p">}</span> +</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a> <span class="c1"># Check if mapping looks like a DataFrame StructType</span> +</span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a> <span class="k">elif</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">mapping</span><span class="p">,</span> <span class="s2">"simpleString"</span><span class="p">):</span> +</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> <span class="k">return</span> <span class="p">{</span><span class="n">struct_field</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> <span class="n">struct_field</span><span class="o">.</span><span class="n">dataType</span><span class="o">.</span><span class="n">simpleString</span><span class="p">()</span> <span class="k">for</span> <span class="n">struct_field</span> <span class="ow">in</span> <span class="n">mapping</span><span class="p">}</span> <span class="c1"># type: ignore</span> +</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">mapping</span><span class="p">,</span> <span class="nb">list</span><span class="p">):</span> +</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a> <span class="k">return</span> <span class="p">{</span><span class="n">x</span><span class="o">.</span><span class="n">strip</span><span class="p">():</span> <span class="kc">None</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">mapping</span><span class="p">}</span> +</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a> <span class="k">elif</span> <span class="n">mapping</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a> <span class="k">return</span> <span class="p">{}</span> +</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Invalid mapping provided: </span><span class="si">{</span><span class="nb">type</span><span class="p">(</span><span class="n">mapping</span><span class="p">)</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> +</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> +</span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a><span class="k">def</span> <span class="nf">flatten_schema</span><span class="p">(</span> +</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">,</span> <span class="n">depth</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">keys</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]]:</span> +</span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a> <span class="n">keys</span> <span class="o">=</span> <span class="n">keys</span> <span class="ow">or</span> <span class="p">[]</span> +</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a> +</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">schema</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a> <span class="k">if</span> <span class="n">depth</span> <span class="o">>=</span> <span class="mi">2</span><span class="p">:</span> +</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a> <span class="n">tables</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">flatten_schema</span><span class="p">(</span><span class="n">v</span><span class="p">,</span> <span class="n">depth</span> <span class="o">-</span> <span class="mi">1</span><span class="p">,</span> <span class="n">keys</span> <span class="o">+</span> <span class="p">[</span><span class="n">k</span><span class="p">]))</span> +</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a> <span class="k">elif</span> <span class="n">depth</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a> <span class="n">tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">keys</span> <span class="o">+</span> <span class="p">[</span><span class="n">k</span><span class="p">])</span> +</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a> <span class="k">return</span> <span class="n">tables</span> +</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a> +</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a> +</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a><span class="k">def</span> <span class="nf">_nested_get</span><span class="p">(</span> +</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> <span class="n">d</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">,</span> <span class="o">*</span><span class="n">path</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">],</span> <span class="n">raise_on_missing</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span> +</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a><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="n">t</span><span class="o">.</span><span class="n">Any</span><span class="p">]:</span> +</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a><span class="sd"> Get a value for a nested dictionary.</span> +</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> +</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a><span class="sd"> Args:</span> +</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a><span class="sd"> d: the dictionary to search.</span> +</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a><span class="sd"> *path: tuples of (name, key), where:</span> +</span><span id="L-358"><a href="#L-358"><span class="linenos">358</span></a><span class="sd"> `key` is the key in the dictionary to get.</span> +</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a><span class="sd"> `name` is a string to use in the error if `key` isn't found.</span> +</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a> +</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a><span class="sd"> Returns:</span> +</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a><span class="sd"> The value or None if it doesn't exist.</span> +</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a><span class="sd"> """</span> +</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">path</span><span class="p">:</span> +</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> <span class="n">d</span> <span class="o">=</span> <span class="n">d</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> <span class="c1"># type: ignore</span> +</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="k">if</span> <span class="n">d</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a> <span class="k">if</span> <span class="n">raise_on_missing</span><span class="p">:</span> +</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> <span class="n">name</span> <span class="o">=</span> <span class="s2">"table"</span> <span class="k">if</span> <span class="n">name</span> <span class="o">==</span> <span class="s2">"this"</span> <span class="k">else</span> <span class="n">name</span> +</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">: </span><span class="si">{</span><span class="n">key</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a> <span class="k">return</span> <span class="n">d</span> +</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a> +</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a> +</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a><span class="k">def</span> <span class="nf">_nested_set</span><span class="p">(</span><span class="n">d</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">,</span> <span class="n">keys</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> <span class="n">value</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Any</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">:</span> +</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a><span class="sd"> In-place set a value for a nested dictionary</span> +</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a> +</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a><span class="sd"> Example:</span> +</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a><span class="sd"> >>> _nested_set({}, ["top_key", "second_key"], "value")</span> +</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a><span class="sd"> {'top_key': {'second_key': 'value'}}</span> +</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> +</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a><span class="sd"> >>> _nested_set({"top_key": {"third_key": "third_value"}}, ["top_key", "second_key"], "value")</span> +</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a><span class="sd"> {'top_key': {'third_key': 'third_value', 'second_key': 'value'}}</span> +</span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a> +</span><span id="L-385"><a href="#L-385"><span class="linenos">385</span></a><span class="sd"> Args:</span> +</span><span id="L-386"><a href="#L-386"><span class="linenos">386</span></a><span class="sd"> d: dictionary to update.</span> +</span><span id="L-387"><a href="#L-387"><span class="linenos">387</span></a><span class="sd"> keys: the keys that makeup the path to `value`.</span> +</span><span id="L-388"><a href="#L-388"><span class="linenos">388</span></a><span class="sd"> value: the value to set in the dictionary for the given key path.</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="sd"> Returns:</span> +</span><span id="L-391"><a href="#L-391"><span class="linenos">391</span></a><span class="sd"> The (possibly) updated dictionary.</span> +</span><span id="L-392"><a href="#L-392"><span class="linenos">392</span></a><span class="sd"> """</span> +</span><span id="L-393"><a href="#L-393"><span class="linenos">393</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">keys</span><span class="p">:</span> +</span><span id="L-394"><a href="#L-394"><span class="linenos">394</span></a> <span class="k">return</span> <span class="n">d</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">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">keys</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-397"><a href="#L-397"><span class="linenos">397</span></a> <span class="n">d</span><span class="p">[</span><span class="n">keys</span><span class="p">[</span><span class="mi">0</span><span class="p">]]</span> <span class="o">=</span> <span class="n">value</span> +</span><span id="L-398"><a href="#L-398"><span class="linenos">398</span></a> <span class="k">return</span> <span class="n">d</span> +</span><span id="L-399"><a href="#L-399"><span class="linenos">399</span></a> +</span><span id="L-400"><a href="#L-400"><span class="linenos">400</span></a> <span class="n">subd</span> <span class="o">=</span> <span class="n">d</span> +</span><span id="L-401"><a href="#L-401"><span class="linenos">401</span></a> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">[:</span><span class="o">-</span><span class="mi">1</span><span class="p">]:</span> +</span><span id="L-402"><a href="#L-402"><span class="linenos">402</span></a> <span class="k">if</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">subd</span><span class="p">:</span> +</span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a> <span class="n">subd</span> <span class="o">=</span> <span class="n">subd</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="p">{})</span> +</span><span id="L-404"><a href="#L-404"><span class="linenos">404</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a> <span class="n">subd</span> <span class="o">=</span> <span class="n">subd</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> +</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a> +</span><span id="L-407"><a href="#L-407"><span class="linenos">407</span></a> <span class="n">subd</span><span class="p">[</span><span class="n">keys</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]]</span> <span class="o">=</span> <span class="n">value</span> +</span><span id="L-408"><a href="#L-408"><span class="linenos">408</span></a> <span class="k">return</span> <span class="n">d</span> +</span></pre></div> + + + </section> + <section id="Schema"> + <input id="Schema-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">Schema</span><wbr>(<span class="base">abc.ABC</span>): + + <label class="view-source-button" for="Schema-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#Schema"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="Schema-24"><a href="#Schema-24"><span class="linenos">24</span></a><span class="k">class</span> <span class="nc">Schema</span><span class="p">(</span><span class="n">abc</span><span class="o">.</span><span class="n">ABC</span><span class="p">):</span> +</span><span id="Schema-25"><a href="#Schema-25"><span class="linenos">25</span></a><span class="w"> </span><span class="sd">"""Abstract base class for database schemas"""</span> +</span><span id="Schema-26"><a href="#Schema-26"><span class="linenos">26</span></a> +</span><span id="Schema-27"><a href="#Schema-27"><span class="linenos">27</span></a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span> +</span><span id="Schema-28"><a href="#Schema-28"><span class="linenos">28</span></a> <span class="k">def</span> <span class="nf">add_table</span><span class="p">(</span> +</span><span id="Schema-29"><a href="#Schema-29"><span class="linenos">29</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">column_mapping</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">ColumnMapping</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Schema-30"><a href="#Schema-30"><span class="linenos">30</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Schema-31"><a href="#Schema-31"><span class="linenos">31</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Schema-32"><a href="#Schema-32"><span class="linenos">32</span></a><span class="sd"> Register or update a table. Some implementing classes may require column information to also be provided.</span> +</span><span id="Schema-33"><a href="#Schema-33"><span class="linenos">33</span></a> +</span><span id="Schema-34"><a href="#Schema-34"><span class="linenos">34</span></a><span class="sd"> Args:</span> +</span><span id="Schema-35"><a href="#Schema-35"><span class="linenos">35</span></a><span class="sd"> table: table expression instance or string representing the table.</span> +</span><span id="Schema-36"><a href="#Schema-36"><span class="linenos">36</span></a><span class="sd"> column_mapping: a column mapping that describes the structure of the table.</span> +</span><span id="Schema-37"><a href="#Schema-37"><span class="linenos">37</span></a><span class="sd"> """</span> +</span><span id="Schema-38"><a href="#Schema-38"><span class="linenos">38</span></a> +</span><span id="Schema-39"><a href="#Schema-39"><span class="linenos">39</span></a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span> +</span><span id="Schema-40"><a href="#Schema-40"><span class="linenos">40</span></a> <span class="k">def</span> <span class="nf">column_names</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> +</span><span id="Schema-41"><a href="#Schema-41"><span class="linenos">41</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Schema-42"><a href="#Schema-42"><span class="linenos">42</span></a><span class="sd"> Get the column names for a table.</span> +</span><span id="Schema-43"><a href="#Schema-43"><span class="linenos">43</span></a> +</span><span id="Schema-44"><a href="#Schema-44"><span class="linenos">44</span></a><span class="sd"> Args:</span> +</span><span id="Schema-45"><a href="#Schema-45"><span class="linenos">45</span></a><span class="sd"> table: the `Table` expression instance.</span> +</span><span id="Schema-46"><a href="#Schema-46"><span class="linenos">46</span></a><span class="sd"> only_visible: whether to include invisible columns.</span> +</span><span id="Schema-47"><a href="#Schema-47"><span class="linenos">47</span></a> +</span><span id="Schema-48"><a href="#Schema-48"><span class="linenos">48</span></a><span class="sd"> Returns:</span> +</span><span id="Schema-49"><a href="#Schema-49"><span class="linenos">49</span></a><span class="sd"> The list of column names.</span> +</span><span id="Schema-50"><a href="#Schema-50"><span class="linenos">50</span></a><span class="sd"> """</span> +</span><span id="Schema-51"><a href="#Schema-51"><span class="linenos">51</span></a> +</span><span id="Schema-52"><a href="#Schema-52"><span class="linenos">52</span></a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span> +</span><span id="Schema-53"><a href="#Schema-53"><span class="linenos">53</span></a> <span class="k">def</span> <span class="nf">get_column_type</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">column</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="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">:</span> +</span><span id="Schema-54"><a href="#Schema-54"><span class="linenos">54</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Schema-55"><a href="#Schema-55"><span class="linenos">55</span></a><span class="sd"> Get the :class:`sqlglot.exp.DataType` type of a column in the schema.</span> +</span><span id="Schema-56"><a href="#Schema-56"><span class="linenos">56</span></a> +</span><span id="Schema-57"><a href="#Schema-57"><span class="linenos">57</span></a><span class="sd"> Args:</span> +</span><span id="Schema-58"><a href="#Schema-58"><span class="linenos">58</span></a><span class="sd"> table: the source table.</span> +</span><span id="Schema-59"><a href="#Schema-59"><span class="linenos">59</span></a><span class="sd"> column: the target column.</span> +</span><span id="Schema-60"><a href="#Schema-60"><span class="linenos">60</span></a> +</span><span id="Schema-61"><a href="#Schema-61"><span class="linenos">61</span></a><span class="sd"> Returns:</span> +</span><span id="Schema-62"><a href="#Schema-62"><span class="linenos">62</span></a><span class="sd"> The resulting column type.</span> +</span><span id="Schema-63"><a href="#Schema-63"><span class="linenos">63</span></a><span class="sd"> """</span> +</span><span id="Schema-64"><a href="#Schema-64"><span class="linenos">64</span></a> +</span><span id="Schema-65"><a href="#Schema-65"><span class="linenos">65</span></a> <span class="nd">@property</span> +</span><span id="Schema-66"><a href="#Schema-66"><span class="linenos">66</span></a> <span class="k">def</span> <span class="nf">supported_table_args</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="o">...</span><span class="p">]:</span> +</span><span id="Schema-67"><a href="#Schema-67"><span class="linenos">67</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Schema-68"><a href="#Schema-68"><span class="linenos">68</span></a><span class="sd"> Table arguments this schema support, e.g. `("this", "db", "catalog")`</span> +</span><span id="Schema-69"><a href="#Schema-69"><span class="linenos">69</span></a><span class="sd"> """</span> +</span><span id="Schema-70"><a href="#Schema-70"><span class="linenos">70</span></a> <span class="k">raise</span> <span class="ne">NotImplementedError</span> +</span></pre></div> + + + <div class="docstring"><p>Abstract base class for database schemas</p> +</div> + + + <div id="Schema.add_table" class="classattr"> + <input id="Schema.add_table-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + <div class="decorator">@abc.abstractmethod</div> + + <span class="def">def</span> + <span class="name">add_table</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="bp">self</span>,</span><span class="param"> <span class="n">table</span><span class="p">:</span> <span class="n"><a href="expressions.html#Table">sqlglot.expressions.Table</a></span> <span class="o">|</span> <span class="nb">str</span>,</span><span class="param"> <span class="n">column_mapping</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Dict</span><span class="p">,</span> <span class="nb">str</span><span class="p">,</span> <span class="n">sqlglot</span><span class="o">.</span><span class="n">dataframe</span><span class="o">.</span><span class="n">sql</span><span class="o">.</span><span class="n">types</span><span class="o">.</span><span class="n">StructType</span><span class="p">,</span> <span class="n">List</span><span class="p">,</span> <span class="n">NoneType</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span></span><span class="return-annotation">) -> <span class="kc">None</span>:</span></span> + + <label class="view-source-button" for="Schema.add_table-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#Schema.add_table"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="Schema.add_table-27"><a href="#Schema.add_table-27"><span class="linenos">27</span></a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span> +</span><span id="Schema.add_table-28"><a href="#Schema.add_table-28"><span class="linenos">28</span></a> <span class="k">def</span> <span class="nf">add_table</span><span class="p">(</span> +</span><span id="Schema.add_table-29"><a href="#Schema.add_table-29"><span class="linenos">29</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">column_mapping</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">ColumnMapping</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Schema.add_table-30"><a href="#Schema.add_table-30"><span class="linenos">30</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Schema.add_table-31"><a href="#Schema.add_table-31"><span class="linenos">31</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Schema.add_table-32"><a href="#Schema.add_table-32"><span class="linenos">32</span></a><span class="sd"> Register or update a table. Some implementing classes may require column information to also be provided.</span> +</span><span id="Schema.add_table-33"><a href="#Schema.add_table-33"><span class="linenos">33</span></a> +</span><span id="Schema.add_table-34"><a href="#Schema.add_table-34"><span class="linenos">34</span></a><span class="sd"> Args:</span> +</span><span id="Schema.add_table-35"><a href="#Schema.add_table-35"><span class="linenos">35</span></a><span class="sd"> table: table expression instance or string representing the table.</span> +</span><span id="Schema.add_table-36"><a href="#Schema.add_table-36"><span class="linenos">36</span></a><span class="sd"> column_mapping: a column mapping that describes the structure of the table.</span> +</span><span id="Schema.add_table-37"><a href="#Schema.add_table-37"><span class="linenos">37</span></a><span class="sd"> """</span> +</span></pre></div> + + + <div class="docstring"><p>Register or update a table. Some implementing classes may require column information to also be provided.</p> + +<h6 id="arguments">Arguments:</h6> + +<ul> +<li><strong>table:</strong> table expression instance or string representing the table.</li> +<li><strong>column_mapping:</strong> a column mapping that describes the structure of the table.</li> +</ul> +</div> + + + </div> + <div id="Schema.column_names" class="classattr"> + <input id="Schema.column_names-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + <div class="decorator">@abc.abstractmethod</div> + + <span class="def">def</span> + <span class="name">column_names</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="bp">self</span>,</span><span class="param"> <span class="n">table</span><span class="p">:</span> <span class="n"><a href="expressions.html#Table">sqlglot.expressions.Table</a></span> <span class="o">|</span> <span class="nb">str</span>,</span><span class="param"> <span class="n">only_visible</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span></span><span class="return-annotation">) -> <span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span>:</span></span> + + <label class="view-source-button" for="Schema.column_names-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#Schema.column_names"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="Schema.column_names-39"><a href="#Schema.column_names-39"><span class="linenos">39</span></a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span> +</span><span id="Schema.column_names-40"><a href="#Schema.column_names-40"><span class="linenos">40</span></a> <span class="k">def</span> <span class="nf">column_names</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> +</span><span id="Schema.column_names-41"><a href="#Schema.column_names-41"><span class="linenos">41</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Schema.column_names-42"><a href="#Schema.column_names-42"><span class="linenos">42</span></a><span class="sd"> Get the column names for a table.</span> +</span><span id="Schema.column_names-43"><a href="#Schema.column_names-43"><span class="linenos">43</span></a> +</span><span id="Schema.column_names-44"><a href="#Schema.column_names-44"><span class="linenos">44</span></a><span class="sd"> Args:</span> +</span><span id="Schema.column_names-45"><a href="#Schema.column_names-45"><span class="linenos">45</span></a><span class="sd"> table: the `Table` expression instance.</span> +</span><span id="Schema.column_names-46"><a href="#Schema.column_names-46"><span class="linenos">46</span></a><span class="sd"> only_visible: whether to include invisible columns.</span> +</span><span id="Schema.column_names-47"><a href="#Schema.column_names-47"><span class="linenos">47</span></a> +</span><span id="Schema.column_names-48"><a href="#Schema.column_names-48"><span class="linenos">48</span></a><span class="sd"> Returns:</span> +</span><span id="Schema.column_names-49"><a href="#Schema.column_names-49"><span class="linenos">49</span></a><span class="sd"> The list of column names.</span> +</span><span id="Schema.column_names-50"><a href="#Schema.column_names-50"><span class="linenos">50</span></a><span class="sd"> """</span> +</span></pre></div> + + + <div class="docstring"><p>Get the column names for a table.</p> + +<h6 id="arguments">Arguments:</h6> + +<ul> +<li><strong>table:</strong> the <code>Table</code> expression instance.</li> +<li><strong>only_visible:</strong> whether to include invisible columns.</li> +</ul> + +<h6 id="returns">Returns:</h6> + +<blockquote> + <p>The list of column names.</p> +</blockquote> +</div> + + + </div> + <div id="Schema.get_column_type" class="classattr"> + <input id="Schema.get_column_type-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + <div class="decorator">@abc.abstractmethod</div> + + <span class="def">def</span> + <span class="name">get_column_type</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="bp">self</span>,</span><span class="param"> <span class="n">table</span><span class="p">:</span> <span class="n"><a href="expressions.html#Table">sqlglot.expressions.Table</a></span> <span class="o">|</span> <span class="nb">str</span>,</span><span class="param"> <span class="n">column</span><span class="p">:</span> <span class="n"><a href="expressions.html#Column">sqlglot.expressions.Column</a></span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#DataType">sqlglot.expressions.DataType</a></span>:</span></span> + + <label class="view-source-button" for="Schema.get_column_type-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#Schema.get_column_type"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="Schema.get_column_type-52"><a href="#Schema.get_column_type-52"><span class="linenos">52</span></a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span> +</span><span id="Schema.get_column_type-53"><a href="#Schema.get_column_type-53"><span class="linenos">53</span></a> <span class="k">def</span> <span class="nf">get_column_type</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">column</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="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">:</span> +</span><span id="Schema.get_column_type-54"><a href="#Schema.get_column_type-54"><span class="linenos">54</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Schema.get_column_type-55"><a href="#Schema.get_column_type-55"><span class="linenos">55</span></a><span class="sd"> Get the :class:`sqlglot.exp.DataType` type of a column in the schema.</span> +</span><span id="Schema.get_column_type-56"><a href="#Schema.get_column_type-56"><span class="linenos">56</span></a> +</span><span id="Schema.get_column_type-57"><a href="#Schema.get_column_type-57"><span class="linenos">57</span></a><span class="sd"> Args:</span> +</span><span id="Schema.get_column_type-58"><a href="#Schema.get_column_type-58"><span class="linenos">58</span></a><span class="sd"> table: the source table.</span> +</span><span id="Schema.get_column_type-59"><a href="#Schema.get_column_type-59"><span class="linenos">59</span></a><span class="sd"> column: the target column.</span> +</span><span id="Schema.get_column_type-60"><a href="#Schema.get_column_type-60"><span class="linenos">60</span></a> +</span><span id="Schema.get_column_type-61"><a href="#Schema.get_column_type-61"><span class="linenos">61</span></a><span class="sd"> Returns:</span> +</span><span id="Schema.get_column_type-62"><a href="#Schema.get_column_type-62"><span class="linenos">62</span></a><span class="sd"> The resulting column type.</span> +</span><span id="Schema.get_column_type-63"><a href="#Schema.get_column_type-63"><span class="linenos">63</span></a><span class="sd"> """</span> +</span></pre></div> + + + <div class="docstring"><p>Get the <code>sqlglot.exp.DataType</code> type of a column in the schema.</p> + +<h6 id="arguments">Arguments:</h6> + +<ul> +<li><strong>table:</strong> the source table.</li> +<li><strong>column:</strong> the target column.</li> +</ul> + +<h6 id="returns">Returns:</h6> + +<blockquote> + <p>The resulting column type.</p> +</blockquote> +</div> + + + </div> + <div id="Schema.supported_table_args" class="classattr"> + <div class="attr variable"> + <span class="name">supported_table_args</span><span class="annotation">: Tuple[str, ...]</span> + + + </div> + <a class="headerlink" href="#Schema.supported_table_args"></a> + + <div class="docstring"><p>Table arguments this schema support, e.g. <code>("this", "db", "catalog")</code></p> +</div> + + + </div> + </section> + <section id="AbstractMappingSchema"> + <input id="AbstractMappingSchema-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">AbstractMappingSchema</span><wbr>(<span class="base">typing.Generic[~T]</span>): + + <label class="view-source-button" for="AbstractMappingSchema-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#AbstractMappingSchema"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="AbstractMappingSchema-73"><a href="#AbstractMappingSchema-73"><span class="linenos"> 73</span></a><span class="k">class</span> <span class="nc">AbstractMappingSchema</span><span class="p">(</span><span class="n">t</span><span class="o">.</span><span class="n">Generic</span><span class="p">[</span><span class="n">T</span><span class="p">]):</span> +</span><span id="AbstractMappingSchema-74"><a href="#AbstractMappingSchema-74"><span class="linenos"> 74</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> +</span><span id="AbstractMappingSchema-75"><a href="#AbstractMappingSchema-75"><span class="linenos"> 75</span></a> <span class="bp">self</span><span class="p">,</span> +</span><span id="AbstractMappingSchema-76"><a href="#AbstractMappingSchema-76"><span class="linenos"> 76</span></a> <span class="n">mapping</span><span class="p">:</span> <span class="nb">dict</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="AbstractMappingSchema-77"><a href="#AbstractMappingSchema-77"><span class="linenos"> 77</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="AbstractMappingSchema-78"><a href="#AbstractMappingSchema-78"><span class="linenos"> 78</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span> <span class="o">=</span> <span class="n">mapping</span> <span class="ow">or</span> <span class="p">{}</span> +</span><span id="AbstractMappingSchema-79"><a href="#AbstractMappingSchema-79"><span class="linenos"> 79</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">mapping_trie</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_build_trie</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">)</span> +</span><span id="AbstractMappingSchema-80"><a href="#AbstractMappingSchema-80"><span class="linenos"> 80</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_supported_table_args</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="o">...</span><span class="p">]</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">()</span> +</span><span id="AbstractMappingSchema-81"><a href="#AbstractMappingSchema-81"><span class="linenos"> 81</span></a> +</span><span id="AbstractMappingSchema-82"><a href="#AbstractMappingSchema-82"><span class="linenos"> 82</span></a> <span class="k">def</span> <span class="nf">_build_trie</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">:</span> +</span><span id="AbstractMappingSchema-83"><a href="#AbstractMappingSchema-83"><span class="linenos"> 83</span></a> <span class="k">return</span> <span class="n">new_trie</span><span class="p">(</span><span class="nb">tuple</span><span class="p">(</span><span class="nb">reversed</span><span class="p">(</span><span class="n">t</span><span class="p">))</span> <span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="n">flatten_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">,</span> <span class="n">depth</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_depth</span><span class="p">()))</span> +</span><span id="AbstractMappingSchema-84"><a href="#AbstractMappingSchema-84"><span class="linenos"> 84</span></a> +</span><span id="AbstractMappingSchema-85"><a href="#AbstractMappingSchema-85"><span class="linenos"> 85</span></a> <span class="k">def</span> <span class="nf">_depth</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span> +</span><span id="AbstractMappingSchema-86"><a href="#AbstractMappingSchema-86"><span class="linenos"> 86</span></a> <span class="k">return</span> <span class="n">dict_depth</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">)</span> +</span><span id="AbstractMappingSchema-87"><a href="#AbstractMappingSchema-87"><span class="linenos"> 87</span></a> +</span><span id="AbstractMappingSchema-88"><a href="#AbstractMappingSchema-88"><span class="linenos"> 88</span></a> <span class="nd">@property</span> +</span><span id="AbstractMappingSchema-89"><a href="#AbstractMappingSchema-89"><span class="linenos"> 89</span></a> <span class="k">def</span> <span class="nf">supported_table_args</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="o">...</span><span class="p">]:</span> +</span><span id="AbstractMappingSchema-90"><a href="#AbstractMappingSchema-90"><span class="linenos"> 90</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_supported_table_args</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">:</span> +</span><span id="AbstractMappingSchema-91"><a href="#AbstractMappingSchema-91"><span class="linenos"> 91</span></a> <span class="n">depth</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_depth</span><span class="p">()</span> +</span><span id="AbstractMappingSchema-92"><a href="#AbstractMappingSchema-92"><span class="linenos"> 92</span></a> +</span><span id="AbstractMappingSchema-93"><a href="#AbstractMappingSchema-93"><span class="linenos"> 93</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">depth</span><span class="p">:</span> <span class="c1"># None</span> +</span><span id="AbstractMappingSchema-94"><a href="#AbstractMappingSchema-94"><span class="linenos"> 94</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_supported_table_args</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">()</span> +</span><span id="AbstractMappingSchema-95"><a href="#AbstractMappingSchema-95"><span class="linenos"> 95</span></a> <span class="k">elif</span> <span class="mi">1</span> <span class="o"><=</span> <span class="n">depth</span> <span class="o"><=</span> <span class="mi">3</span><span class="p">:</span> +</span><span id="AbstractMappingSchema-96"><a href="#AbstractMappingSchema-96"><span class="linenos"> 96</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_supported_table_args</span> <span class="o">=</span> <span class="n">TABLE_ARGS</span><span class="p">[:</span><span class="n">depth</span><span class="p">]</span> +</span><span id="AbstractMappingSchema-97"><a href="#AbstractMappingSchema-97"><span class="linenos"> 97</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="AbstractMappingSchema-98"><a href="#AbstractMappingSchema-98"><span class="linenos"> 98</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Invalid mapping shape. Depth: </span><span class="si">{</span><span class="n">depth</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="AbstractMappingSchema-99"><a href="#AbstractMappingSchema-99"><span class="linenos"> 99</span></a> +</span><span id="AbstractMappingSchema-100"><a href="#AbstractMappingSchema-100"><span class="linenos">100</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_supported_table_args</span> +</span><span id="AbstractMappingSchema-101"><a href="#AbstractMappingSchema-101"><span class="linenos">101</span></a> +</span><span id="AbstractMappingSchema-102"><a href="#AbstractMappingSchema-102"><span class="linenos">102</span></a> <span class="k">def</span> <span class="nf">table_parts</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> +</span><span id="AbstractMappingSchema-103"><a href="#AbstractMappingSchema-103"><span class="linenos">103</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">table</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span> +</span><span id="AbstractMappingSchema-104"><a href="#AbstractMappingSchema-104"><span class="linenos">104</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">table</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">name</span><span class="p">]</span> +</span><span id="AbstractMappingSchema-105"><a href="#AbstractMappingSchema-105"><span class="linenos">105</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">table</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="n">part</span><span class="p">)</span> <span class="k">for</span> <span class="n">part</span> <span class="ow">in</span> <span class="n">TABLE_ARGS</span> <span class="k">if</span> <span class="n">table</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="n">part</span><span class="p">)]</span> +</span><span id="AbstractMappingSchema-106"><a href="#AbstractMappingSchema-106"><span class="linenos">106</span></a> +</span><span id="AbstractMappingSchema-107"><a href="#AbstractMappingSchema-107"><span class="linenos">107</span></a> <span class="k">def</span> <span class="nf">find</span><span class="p">(</span> +</span><span id="AbstractMappingSchema-108"><a href="#AbstractMappingSchema-108"><span class="linenos">108</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">,</span> <span class="n">trie</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span> +</span><span id="AbstractMappingSchema-109"><a href="#AbstractMappingSchema-109"><span class="linenos">109</span></a> <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="n">T</span><span class="p">]:</span> +</span><span id="AbstractMappingSchema-110"><a href="#AbstractMappingSchema-110"><span class="linenos">110</span></a> <span class="n">parts</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">table_parts</span><span class="p">(</span><span class="n">table</span><span class="p">)[</span><span class="mi">0</span> <span class="p">:</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">supported_table_args</span><span class="p">)]</span> +</span><span id="AbstractMappingSchema-111"><a href="#AbstractMappingSchema-111"><span class="linenos">111</span></a> <span class="n">value</span><span class="p">,</span> <span class="n">trie</span> <span class="o">=</span> <span class="n">in_trie</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mapping_trie</span> <span class="k">if</span> <span class="n">trie</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">trie</span><span class="p">,</span> <span class="n">parts</span><span class="p">)</span> +</span><span id="AbstractMappingSchema-112"><a href="#AbstractMappingSchema-112"><span class="linenos">112</span></a> +</span><span id="AbstractMappingSchema-113"><a href="#AbstractMappingSchema-113"><span class="linenos">113</span></a> <span class="k">if</span> <span class="n">value</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span> +</span><span id="AbstractMappingSchema-114"><a href="#AbstractMappingSchema-114"><span class="linenos">114</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="AbstractMappingSchema-115"><a href="#AbstractMappingSchema-115"><span class="linenos">115</span></a> <span class="k">elif</span> <span class="n">value</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="AbstractMappingSchema-116"><a href="#AbstractMappingSchema-116"><span class="linenos">116</span></a> <span class="n">possibilities</span> <span class="o">=</span> <span class="n">flatten_schema</span><span class="p">(</span><span class="n">trie</span><span class="p">,</span> <span class="n">depth</span><span class="o">=</span><span class="n">dict_depth</span><span class="p">(</span><span class="n">trie</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">)</span> +</span><span id="AbstractMappingSchema-117"><a href="#AbstractMappingSchema-117"><span class="linenos">117</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">possibilities</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="AbstractMappingSchema-118"><a href="#AbstractMappingSchema-118"><span class="linenos">118</span></a> <span class="n">parts</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">possibilities</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> +</span><span id="AbstractMappingSchema-119"><a href="#AbstractMappingSchema-119"><span class="linenos">119</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="AbstractMappingSchema-120"><a href="#AbstractMappingSchema-120"><span class="linenos">120</span></a> <span class="n">message</span> <span class="o">=</span> <span class="s2">", "</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="s2">"."</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">parts</span><span class="p">)</span> <span class="k">for</span> <span class="n">parts</span> <span class="ow">in</span> <span class="n">possibilities</span><span class="p">)</span> +</span><span id="AbstractMappingSchema-121"><a href="#AbstractMappingSchema-121"><span class="linenos">121</span></a> <span class="k">if</span> <span class="n">raise_on_missing</span><span class="p">:</span> +</span><span id="AbstractMappingSchema-122"><a href="#AbstractMappingSchema-122"><span class="linenos">122</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous mapping for </span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2">: </span><span class="si">{</span><span class="n">message</span><span class="si">}</span><span class="s2">."</span><span class="p">)</span> +</span><span id="AbstractMappingSchema-123"><a href="#AbstractMappingSchema-123"><span class="linenos">123</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="AbstractMappingSchema-124"><a href="#AbstractMappingSchema-124"><span class="linenos">124</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_nested_get</span><span class="p">(</span><span class="n">parts</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="o">=</span><span class="n">raise_on_missing</span><span class="p">)</span> +</span><span id="AbstractMappingSchema-125"><a href="#AbstractMappingSchema-125"><span class="linenos">125</span></a> +</span><span id="AbstractMappingSchema-126"><a href="#AbstractMappingSchema-126"><span class="linenos">126</span></a> <span class="k">def</span> <span class="nf">_nested_get</span><span class="p">(</span> +</span><span id="AbstractMappingSchema-127"><a href="#AbstractMappingSchema-127"><span class="linenos">127</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">parts</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> <span class="n">d</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="o">=</span><span class="kc">True</span> +</span><span id="AbstractMappingSchema-128"><a href="#AbstractMappingSchema-128"><span class="linenos">128</span></a> <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="n">t</span><span class="o">.</span><span class="n">Any</span><span class="p">]:</span> +</span><span id="AbstractMappingSchema-129"><a href="#AbstractMappingSchema-129"><span class="linenos">129</span></a> <span class="k">return</span> <span class="n">_nested_get</span><span class="p">(</span> +</span><span id="AbstractMappingSchema-130"><a href="#AbstractMappingSchema-130"><span class="linenos">130</span></a> <span class="n">d</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">,</span> +</span><span id="AbstractMappingSchema-131"><a href="#AbstractMappingSchema-131"><span class="linenos">131</span></a> <span class="o">*</span><span class="nb">zip</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">supported_table_args</span><span class="p">,</span> <span class="nb">reversed</span><span class="p">(</span><span class="n">parts</span><span class="p">)),</span> +</span><span id="AbstractMappingSchema-132"><a href="#AbstractMappingSchema-132"><span class="linenos">132</span></a> <span class="n">raise_on_missing</span><span class="o">=</span><span class="n">raise_on_missing</span><span class="p">,</span> +</span><span id="AbstractMappingSchema-133"><a href="#AbstractMappingSchema-133"><span class="linenos">133</span></a> <span class="p">)</span> +</span></pre></div> + + + <div class="docstring"><p>Abstract base class for generic types.</p> + +<p>A generic type is typically declared by inheriting from +this class parameterized with one or more type variables. +For example, a generic mapping type might be defined as::</p> + +<p>class Mapping(Generic[KT, VT]): + def __getitem__(self, key: KT) -> VT: + ... + # Etc.</p> + +<p>This class can then be used as follows::</p> + +<p>def lookup_name(mapping: Mapping[KT, VT], key: KT, default: VT) -> VT: + try: + return mapping[key] + except KeyError: + return default</p> +</div> + + + <div id="AbstractMappingSchema.__init__" class="classattr"> + <input id="AbstractMappingSchema.__init__-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + + <span class="name">AbstractMappingSchema</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">mapping</span><span class="p">:</span> <span class="nb">dict</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span></span>)</span> + + <label class="view-source-button" for="AbstractMappingSchema.__init__-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#AbstractMappingSchema.__init__"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="AbstractMappingSchema.__init__-74"><a href="#AbstractMappingSchema.__init__-74"><span class="linenos">74</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> +</span><span id="AbstractMappingSchema.__init__-75"><a href="#AbstractMappingSchema.__init__-75"><span class="linenos">75</span></a> <span class="bp">self</span><span class="p">,</span> +</span><span id="AbstractMappingSchema.__init__-76"><a href="#AbstractMappingSchema.__init__-76"><span class="linenos">76</span></a> <span class="n">mapping</span><span class="p">:</span> <span class="nb">dict</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="AbstractMappingSchema.__init__-77"><a href="#AbstractMappingSchema.__init__-77"><span class="linenos">77</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="AbstractMappingSchema.__init__-78"><a href="#AbstractMappingSchema.__init__-78"><span class="linenos">78</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span> <span class="o">=</span> <span class="n">mapping</span> <span class="ow">or</span> <span class="p">{}</span> +</span><span id="AbstractMappingSchema.__init__-79"><a href="#AbstractMappingSchema.__init__-79"><span class="linenos">79</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">mapping_trie</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_build_trie</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">)</span> +</span><span id="AbstractMappingSchema.__init__-80"><a href="#AbstractMappingSchema.__init__-80"><span class="linenos">80</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_supported_table_args</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="o">...</span><span class="p">]</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">()</span> +</span></pre></div> + + + + + </div> + <div id="AbstractMappingSchema.table_parts" class="classattr"> + <input id="AbstractMappingSchema.table_parts-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">table_parts</span><span class="signature pdoc-code condensed">(<span class="param"><span class="bp">self</span>, </span><span class="param"><span class="n">table</span><span class="p">:</span> <span class="n"><a href="expressions.html#Table">sqlglot.expressions.Table</a></span></span><span class="return-annotation">) -> <span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span>:</span></span> + + <label class="view-source-button" for="AbstractMappingSchema.table_parts-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#AbstractMappingSchema.table_parts"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="AbstractMappingSchema.table_parts-102"><a href="#AbstractMappingSchema.table_parts-102"><span class="linenos">102</span></a> <span class="k">def</span> <span class="nf">table_parts</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> +</span><span id="AbstractMappingSchema.table_parts-103"><a href="#AbstractMappingSchema.table_parts-103"><span class="linenos">103</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">table</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span> +</span><span id="AbstractMappingSchema.table_parts-104"><a href="#AbstractMappingSchema.table_parts-104"><span class="linenos">104</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">table</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">name</span><span class="p">]</span> +</span><span id="AbstractMappingSchema.table_parts-105"><a href="#AbstractMappingSchema.table_parts-105"><span class="linenos">105</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">table</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="n">part</span><span class="p">)</span> <span class="k">for</span> <span class="n">part</span> <span class="ow">in</span> <span class="n">TABLE_ARGS</span> <span class="k">if</span> <span class="n">table</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="n">part</span><span class="p">)]</span> +</span></pre></div> + + + + + </div> + <div id="AbstractMappingSchema.find" class="classattr"> + <input id="AbstractMappingSchema.find-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">find</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="bp">self</span>,</span><span class="param"> <span class="n">table</span><span class="p">:</span> <span class="n"><a href="expressions.html#Table">sqlglot.expressions.Table</a></span>,</span><span class="param"> <span class="n">trie</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">raise_on_missing</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span></span><span class="return-annotation">) -> <span class="n">Optional</span><span class="p">[</span><span class="o">~</span><span class="n">T</span><span class="p">]</span>:</span></span> + + <label class="view-source-button" for="AbstractMappingSchema.find-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#AbstractMappingSchema.find"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="AbstractMappingSchema.find-107"><a href="#AbstractMappingSchema.find-107"><span class="linenos">107</span></a> <span class="k">def</span> <span class="nf">find</span><span class="p">(</span> +</span><span id="AbstractMappingSchema.find-108"><a href="#AbstractMappingSchema.find-108"><span class="linenos">108</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">,</span> <span class="n">trie</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span> +</span><span id="AbstractMappingSchema.find-109"><a href="#AbstractMappingSchema.find-109"><span class="linenos">109</span></a> <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="n">T</span><span class="p">]:</span> +</span><span id="AbstractMappingSchema.find-110"><a href="#AbstractMappingSchema.find-110"><span class="linenos">110</span></a> <span class="n">parts</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">table_parts</span><span class="p">(</span><span class="n">table</span><span class="p">)[</span><span class="mi">0</span> <span class="p">:</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">supported_table_args</span><span class="p">)]</span> +</span><span id="AbstractMappingSchema.find-111"><a href="#AbstractMappingSchema.find-111"><span class="linenos">111</span></a> <span class="n">value</span><span class="p">,</span> <span class="n">trie</span> <span class="o">=</span> <span class="n">in_trie</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mapping_trie</span> <span class="k">if</span> <span class="n">trie</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">trie</span><span class="p">,</span> <span class="n">parts</span><span class="p">)</span> +</span><span id="AbstractMappingSchema.find-112"><a href="#AbstractMappingSchema.find-112"><span class="linenos">112</span></a> +</span><span id="AbstractMappingSchema.find-113"><a href="#AbstractMappingSchema.find-113"><span class="linenos">113</span></a> <span class="k">if</span> <span class="n">value</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span> +</span><span id="AbstractMappingSchema.find-114"><a href="#AbstractMappingSchema.find-114"><span class="linenos">114</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="AbstractMappingSchema.find-115"><a href="#AbstractMappingSchema.find-115"><span class="linenos">115</span></a> <span class="k">elif</span> <span class="n">value</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="AbstractMappingSchema.find-116"><a href="#AbstractMappingSchema.find-116"><span class="linenos">116</span></a> <span class="n">possibilities</span> <span class="o">=</span> <span class="n">flatten_schema</span><span class="p">(</span><span class="n">trie</span><span class="p">,</span> <span class="n">depth</span><span class="o">=</span><span class="n">dict_depth</span><span class="p">(</span><span class="n">trie</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">)</span> +</span><span id="AbstractMappingSchema.find-117"><a href="#AbstractMappingSchema.find-117"><span class="linenos">117</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">possibilities</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="AbstractMappingSchema.find-118"><a href="#AbstractMappingSchema.find-118"><span class="linenos">118</span></a> <span class="n">parts</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">possibilities</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> +</span><span id="AbstractMappingSchema.find-119"><a href="#AbstractMappingSchema.find-119"><span class="linenos">119</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="AbstractMappingSchema.find-120"><a href="#AbstractMappingSchema.find-120"><span class="linenos">120</span></a> <span class="n">message</span> <span class="o">=</span> <span class="s2">", "</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="s2">"."</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">parts</span><span class="p">)</span> <span class="k">for</span> <span class="n">parts</span> <span class="ow">in</span> <span class="n">possibilities</span><span class="p">)</span> +</span><span id="AbstractMappingSchema.find-121"><a href="#AbstractMappingSchema.find-121"><span class="linenos">121</span></a> <span class="k">if</span> <span class="n">raise_on_missing</span><span class="p">:</span> +</span><span id="AbstractMappingSchema.find-122"><a href="#AbstractMappingSchema.find-122"><span class="linenos">122</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous mapping for </span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2">: </span><span class="si">{</span><span class="n">message</span><span class="si">}</span><span class="s2">."</span><span class="p">)</span> +</span><span id="AbstractMappingSchema.find-123"><a href="#AbstractMappingSchema.find-123"><span class="linenos">123</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="AbstractMappingSchema.find-124"><a href="#AbstractMappingSchema.find-124"><span class="linenos">124</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_nested_get</span><span class="p">(</span><span class="n">parts</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="o">=</span><span class="n">raise_on_missing</span><span class="p">)</span> +</span></pre></div> + + + + + </div> + </section> + <section id="MappingSchema"> + <input id="MappingSchema-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">MappingSchema</span><wbr>(<span class="base"><a href="#AbstractMappingSchema">sqlglot.schema.AbstractMappingSchema[typing.Dict[str, str]]</a></span>, <span class="base"><a href="#Schema">Schema</a></span>): + + <label class="view-source-button" for="MappingSchema-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#MappingSchema"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="MappingSchema-136"><a href="#MappingSchema-136"><span class="linenos">136</span></a><span class="k">class</span> <span class="nc">MappingSchema</span><span class="p">(</span><span class="n">AbstractMappingSchema</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]],</span> <span class="n">Schema</span><span class="p">):</span> +</span><span id="MappingSchema-137"><a href="#MappingSchema-137"><span class="linenos">137</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="MappingSchema-138"><a href="#MappingSchema-138"><span class="linenos">138</span></a><span class="sd"> Schema based on a nested mapping.</span> +</span><span id="MappingSchema-139"><a href="#MappingSchema-139"><span class="linenos">139</span></a> +</span><span id="MappingSchema-140"><a href="#MappingSchema-140"><span class="linenos">140</span></a><span class="sd"> Args:</span> +</span><span id="MappingSchema-141"><a href="#MappingSchema-141"><span class="linenos">141</span></a><span class="sd"> schema (dict): Mapping in one of the following forms:</span> +</span><span id="MappingSchema-142"><a href="#MappingSchema-142"><span class="linenos">142</span></a><span class="sd"> 1. {table: {col: type}}</span> +</span><span id="MappingSchema-143"><a href="#MappingSchema-143"><span class="linenos">143</span></a><span class="sd"> 2. {db: {table: {col: type}}}</span> +</span><span id="MappingSchema-144"><a href="#MappingSchema-144"><span class="linenos">144</span></a><span class="sd"> 3. {catalog: {db: {table: {col: type}}}}</span> +</span><span id="MappingSchema-145"><a href="#MappingSchema-145"><span class="linenos">145</span></a><span class="sd"> 4. None - Tables will be added later</span> +</span><span id="MappingSchema-146"><a href="#MappingSchema-146"><span class="linenos">146</span></a><span class="sd"> visible (dict): Optional mapping of which columns in the schema are visible. If not provided, all columns</span> +</span><span id="MappingSchema-147"><a href="#MappingSchema-147"><span class="linenos">147</span></a><span class="sd"> are assumed to be visible. The nesting should mirror that of the schema:</span> +</span><span id="MappingSchema-148"><a href="#MappingSchema-148"><span class="linenos">148</span></a><span class="sd"> 1. {table: set(*cols)}}</span> +</span><span id="MappingSchema-149"><a href="#MappingSchema-149"><span class="linenos">149</span></a><span class="sd"> 2. {db: {table: set(*cols)}}}</span> +</span><span id="MappingSchema-150"><a href="#MappingSchema-150"><span class="linenos">150</span></a><span class="sd"> 3. {catalog: {db: {table: set(*cols)}}}}</span> +</span><span id="MappingSchema-151"><a href="#MappingSchema-151"><span class="linenos">151</span></a><span class="sd"> dialect (str): The dialect to be used for custom type mappings.</span> +</span><span id="MappingSchema-152"><a href="#MappingSchema-152"><span class="linenos">152</span></a><span class="sd"> """</span> +</span><span id="MappingSchema-153"><a href="#MappingSchema-153"><span class="linenos">153</span></a> +</span><span id="MappingSchema-154"><a href="#MappingSchema-154"><span class="linenos">154</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> +</span><span id="MappingSchema-155"><a href="#MappingSchema-155"><span class="linenos">155</span></a> <span class="bp">self</span><span class="p">,</span> +</span><span id="MappingSchema-156"><a href="#MappingSchema-156"><span class="linenos">156</span></a> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="MappingSchema-157"><a href="#MappingSchema-157"><span class="linenos">157</span></a> <span class="n">visible</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="MappingSchema-158"><a href="#MappingSchema-158"><span class="linenos">158</span></a> <span class="n">dialect</span><span class="p">:</span> <span class="n">DialectType</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="MappingSchema-159"><a href="#MappingSchema-159"><span class="linenos">159</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="MappingSchema-160"><a href="#MappingSchema-160"><span class="linenos">160</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">dialect</span> <span class="o">=</span> <span class="n">dialect</span> +</span><span id="MappingSchema-161"><a href="#MappingSchema-161"><span class="linenos">161</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">visible</span> <span class="o">=</span> <span class="n">visible</span> <span class="ow">or</span> <span class="p">{}</span> +</span><span id="MappingSchema-162"><a href="#MappingSchema-162"><span class="linenos">162</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_type_mapping_cache</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="MappingSchema-163"><a href="#MappingSchema-163"><span class="linenos">163</span></a> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_normalize</span><span class="p">(</span><span class="n">schema</span> <span class="ow">or</span> <span class="p">{}))</span> +</span><span id="MappingSchema-164"><a href="#MappingSchema-164"><span class="linenos">164</span></a> +</span><span id="MappingSchema-165"><a href="#MappingSchema-165"><span class="linenos">165</span></a> <span class="nd">@classmethod</span> +</span><span id="MappingSchema-166"><a href="#MappingSchema-166"><span class="linenos">166</span></a> <span class="k">def</span> <span class="nf">from_mapping_schema</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">mapping_schema</span><span class="p">:</span> <span class="n">MappingSchema</span><span class="p">)</span> <span class="o">-></span> <span class="n">MappingSchema</span><span class="p">:</span> +</span><span id="MappingSchema-167"><a href="#MappingSchema-167"><span class="linenos">167</span></a> <span class="k">return</span> <span class="n">MappingSchema</span><span class="p">(</span> +</span><span id="MappingSchema-168"><a href="#MappingSchema-168"><span class="linenos">168</span></a> <span class="n">schema</span><span class="o">=</span><span class="n">mapping_schema</span><span class="o">.</span><span class="n">mapping</span><span class="p">,</span> +</span><span id="MappingSchema-169"><a href="#MappingSchema-169"><span class="linenos">169</span></a> <span class="n">visible</span><span class="o">=</span><span class="n">mapping_schema</span><span class="o">.</span><span class="n">visible</span><span class="p">,</span> +</span><span id="MappingSchema-170"><a href="#MappingSchema-170"><span class="linenos">170</span></a> <span class="n">dialect</span><span class="o">=</span><span class="n">mapping_schema</span><span class="o">.</span><span class="n">dialect</span><span class="p">,</span> +</span><span id="MappingSchema-171"><a href="#MappingSchema-171"><span class="linenos">171</span></a> <span class="p">)</span> +</span><span id="MappingSchema-172"><a href="#MappingSchema-172"><span class="linenos">172</span></a> +</span><span id="MappingSchema-173"><a href="#MappingSchema-173"><span class="linenos">173</span></a> <span class="k">def</span> <span class="nf">copy</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> <span class="o">-></span> <span class="n">MappingSchema</span><span class="p">:</span> +</span><span id="MappingSchema-174"><a href="#MappingSchema-174"><span class="linenos">174</span></a> <span class="k">return</span> <span class="n">MappingSchema</span><span class="p">(</span> +</span><span id="MappingSchema-175"><a href="#MappingSchema-175"><span class="linenos">175</span></a> <span class="o">**</span><span class="p">{</span> <span class="c1"># type: ignore</span> +</span><span id="MappingSchema-176"><a href="#MappingSchema-176"><span class="linenos">176</span></a> <span class="s2">"schema"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> +</span><span id="MappingSchema-177"><a href="#MappingSchema-177"><span class="linenos">177</span></a> <span class="s2">"visible"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">visible</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> +</span><span id="MappingSchema-178"><a href="#MappingSchema-178"><span class="linenos">178</span></a> <span class="s2">"dialect"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">dialect</span><span class="p">,</span> +</span><span id="MappingSchema-179"><a href="#MappingSchema-179"><span class="linenos">179</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> +</span><span id="MappingSchema-180"><a href="#MappingSchema-180"><span class="linenos">180</span></a> <span class="p">}</span> +</span><span id="MappingSchema-181"><a href="#MappingSchema-181"><span class="linenos">181</span></a> <span class="p">)</span> +</span><span id="MappingSchema-182"><a href="#MappingSchema-182"><span class="linenos">182</span></a> +</span><span id="MappingSchema-183"><a href="#MappingSchema-183"><span class="linenos">183</span></a> <span class="k">def</span> <span class="nf">_normalize</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">:</span> +</span><span id="MappingSchema-184"><a href="#MappingSchema-184"><span class="linenos">184</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="MappingSchema-185"><a href="#MappingSchema-185"><span class="linenos">185</span></a><span class="sd"> Converts all identifiers in the schema into lowercase, unless they're quoted.</span> +</span><span id="MappingSchema-186"><a href="#MappingSchema-186"><span class="linenos">186</span></a> +</span><span id="MappingSchema-187"><a href="#MappingSchema-187"><span class="linenos">187</span></a><span class="sd"> Args:</span> +</span><span id="MappingSchema-188"><a href="#MappingSchema-188"><span class="linenos">188</span></a><span class="sd"> schema: the schema to normalize.</span> +</span><span id="MappingSchema-189"><a href="#MappingSchema-189"><span class="linenos">189</span></a> +</span><span id="MappingSchema-190"><a href="#MappingSchema-190"><span class="linenos">190</span></a><span class="sd"> Returns:</span> +</span><span id="MappingSchema-191"><a href="#MappingSchema-191"><span class="linenos">191</span></a><span class="sd"> The normalized schema mapping.</span> +</span><span id="MappingSchema-192"><a href="#MappingSchema-192"><span class="linenos">192</span></a><span class="sd"> """</span> +</span><span id="MappingSchema-193"><a href="#MappingSchema-193"><span class="linenos">193</span></a> <span class="n">flattened_schema</span> <span class="o">=</span> <span class="n">flatten_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">,</span> <span class="n">depth</span><span class="o">=</span><span class="n">dict_depth</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">)</span> +</span><span id="MappingSchema-194"><a href="#MappingSchema-194"><span class="linenos">194</span></a> +</span><span id="MappingSchema-195"><a href="#MappingSchema-195"><span class="linenos">195</span></a> <span class="n">normalized_mapping</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="MappingSchema-196"><a href="#MappingSchema-196"><span class="linenos">196</span></a> <span class="k">for</span> <span class="n">keys</span> <span class="ow">in</span> <span class="n">flattened_schema</span><span class="p">:</span> +</span><span id="MappingSchema-197"><a href="#MappingSchema-197"><span class="linenos">197</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">_nested_get</span><span class="p">(</span><span class="n">schema</span><span class="p">,</span> <span class="o">*</span><span class="nb">zip</span><span class="p">(</span><span class="n">keys</span><span class="p">,</span> <span class="n">keys</span><span class="p">))</span> +</span><span id="MappingSchema-198"><a href="#MappingSchema-198"><span class="linenos">198</span></a> <span class="k">assert</span> <span class="n">columns</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> +</span><span id="MappingSchema-199"><a href="#MappingSchema-199"><span class="linenos">199</span></a> +</span><span id="MappingSchema-200"><a href="#MappingSchema-200"><span class="linenos">200</span></a> <span class="n">normalized_keys</span> <span class="o">=</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_normalize_name</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">]</span> +</span><span id="MappingSchema-201"><a href="#MappingSchema-201"><span class="linenos">201</span></a> <span class="k">for</span> <span class="n">column_name</span><span class="p">,</span> <span class="n">column_type</span> <span class="ow">in</span> <span class="n">columns</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="MappingSchema-202"><a href="#MappingSchema-202"><span class="linenos">202</span></a> <span class="n">_nested_set</span><span class="p">(</span> +</span><span id="MappingSchema-203"><a href="#MappingSchema-203"><span class="linenos">203</span></a> <span class="n">normalized_mapping</span><span class="p">,</span> +</span><span id="MappingSchema-204"><a href="#MappingSchema-204"><span class="linenos">204</span></a> <span class="n">normalized_keys</span> <span class="o">+</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_normalize_name</span><span class="p">(</span><span class="n">column_name</span><span class="p">)],</span> +</span><span id="MappingSchema-205"><a href="#MappingSchema-205"><span class="linenos">205</span></a> <span class="n">column_type</span><span class="p">,</span> +</span><span id="MappingSchema-206"><a href="#MappingSchema-206"><span class="linenos">206</span></a> <span class="p">)</span> +</span><span id="MappingSchema-207"><a href="#MappingSchema-207"><span class="linenos">207</span></a> +</span><span id="MappingSchema-208"><a href="#MappingSchema-208"><span class="linenos">208</span></a> <span class="k">return</span> <span class="n">normalized_mapping</span> +</span><span id="MappingSchema-209"><a href="#MappingSchema-209"><span class="linenos">209</span></a> +</span><span id="MappingSchema-210"><a href="#MappingSchema-210"><span class="linenos">210</span></a> <span class="k">def</span> <span class="nf">add_table</span><span class="p">(</span> +</span><span id="MappingSchema-211"><a href="#MappingSchema-211"><span class="linenos">211</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">column_mapping</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">ColumnMapping</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="MappingSchema-212"><a href="#MappingSchema-212"><span class="linenos">212</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="MappingSchema-213"><a href="#MappingSchema-213"><span class="linenos">213</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="MappingSchema-214"><a href="#MappingSchema-214"><span class="linenos">214</span></a><span class="sd"> Register or update a table. Updates are only performed if a new column mapping is provided.</span> +</span><span id="MappingSchema-215"><a href="#MappingSchema-215"><span class="linenos">215</span></a> +</span><span id="MappingSchema-216"><a href="#MappingSchema-216"><span class="linenos">216</span></a><span class="sd"> Args:</span> +</span><span id="MappingSchema-217"><a href="#MappingSchema-217"><span class="linenos">217</span></a><span class="sd"> table: the `Table` expression instance or string representing the table.</span> +</span><span id="MappingSchema-218"><a href="#MappingSchema-218"><span class="linenos">218</span></a><span class="sd"> column_mapping: a column mapping that describes the structure of the table.</span> +</span><span id="MappingSchema-219"><a href="#MappingSchema-219"><span class="linenos">219</span></a><span class="sd"> """</span> +</span><span id="MappingSchema-220"><a href="#MappingSchema-220"><span class="linenos">220</span></a> <span class="n">table_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_table</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="MappingSchema-221"><a href="#MappingSchema-221"><span class="linenos">221</span></a> <span class="n">column_mapping</span> <span class="o">=</span> <span class="n">ensure_column_mapping</span><span class="p">(</span><span class="n">column_mapping</span><span class="p">)</span> +</span><span id="MappingSchema-222"><a href="#MappingSchema-222"><span class="linenos">222</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">table_</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="MappingSchema-223"><a href="#MappingSchema-223"><span class="linenos">223</span></a> +</span><span id="MappingSchema-224"><a href="#MappingSchema-224"><span class="linenos">224</span></a> <span class="k">if</span> <span class="n">schema</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">column_mapping</span><span class="p">:</span> +</span><span id="MappingSchema-225"><a href="#MappingSchema-225"><span class="linenos">225</span></a> <span class="k">return</span> +</span><span id="MappingSchema-226"><a href="#MappingSchema-226"><span class="linenos">226</span></a> +</span><span id="MappingSchema-227"><a href="#MappingSchema-227"><span class="linenos">227</span></a> <span class="n">_nested_set</span><span class="p">(</span> +</span><span id="MappingSchema-228"><a href="#MappingSchema-228"><span class="linenos">228</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">,</span> +</span><span id="MappingSchema-229"><a href="#MappingSchema-229"><span class="linenos">229</span></a> <span class="nb">list</span><span class="p">(</span><span class="nb">reversed</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">table_parts</span><span class="p">(</span><span class="n">table_</span><span class="p">))),</span> +</span><span id="MappingSchema-230"><a href="#MappingSchema-230"><span class="linenos">230</span></a> <span class="n">column_mapping</span><span class="p">,</span> +</span><span id="MappingSchema-231"><a href="#MappingSchema-231"><span class="linenos">231</span></a> <span class="p">)</span> +</span><span id="MappingSchema-232"><a href="#MappingSchema-232"><span class="linenos">232</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">mapping_trie</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_build_trie</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">)</span> +</span><span id="MappingSchema-233"><a href="#MappingSchema-233"><span class="linenos">233</span></a> +</span><span id="MappingSchema-234"><a href="#MappingSchema-234"><span class="linenos">234</span></a> <span class="k">def</span> <span class="nf">_normalize_name</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="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> +</span><span id="MappingSchema-235"><a href="#MappingSchema-235"><span class="linenos">235</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="MappingSchema-236"><a href="#MappingSchema-236"><span class="linenos">236</span></a> <span class="n">identifier</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]</span> <span class="o">=</span> <span class="n">sqlglot</span><span class="o">.</span><span class="n">parse_one</span><span class="p">(</span> +</span><span id="MappingSchema-237"><a href="#MappingSchema-237"><span class="linenos">237</span></a> <span class="n">name</span><span class="p">,</span> <span class="n">read</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">dialect</span><span class="p">,</span> <span class="n">into</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span> +</span><span id="MappingSchema-238"><a href="#MappingSchema-238"><span class="linenos">238</span></a> <span class="p">)</span> +</span><span id="MappingSchema-239"><a href="#MappingSchema-239"><span class="linenos">239</span></a> <span class="k">except</span><span class="p">:</span> +</span><span id="MappingSchema-240"><a href="#MappingSchema-240"><span class="linenos">240</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> +</span><span id="MappingSchema-241"><a href="#MappingSchema-241"><span class="linenos">241</span></a> <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">)</span> +</span><span id="MappingSchema-242"><a href="#MappingSchema-242"><span class="linenos">242</span></a> +</span><span id="MappingSchema-243"><a href="#MappingSchema-243"><span class="linenos">243</span></a> <span class="k">if</span> <span class="n">identifier</span><span class="o">.</span><span class="n">quoted</span><span class="p">:</span> +</span><span id="MappingSchema-244"><a href="#MappingSchema-244"><span class="linenos">244</span></a> <span class="k">return</span> <span class="n">identifier</span><span class="o">.</span><span class="n">name</span> +</span><span id="MappingSchema-245"><a href="#MappingSchema-245"><span class="linenos">245</span></a> <span class="k">return</span> <span class="n">identifier</span><span class="o">.</span><span class="n">name</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> +</span><span id="MappingSchema-246"><a href="#MappingSchema-246"><span class="linenos">246</span></a> +</span><span id="MappingSchema-247"><a href="#MappingSchema-247"><span class="linenos">247</span></a> <span class="k">def</span> <span class="nf">_depth</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span> +</span><span id="MappingSchema-248"><a href="#MappingSchema-248"><span class="linenos">248</span></a> <span class="c1"># The columns themselves are a mapping, but we don't want to include those</span> +</span><span id="MappingSchema-249"><a href="#MappingSchema-249"><span class="linenos">249</span></a> <span class="k">return</span> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="n">_depth</span><span class="p">()</span> <span class="o">-</span> <span class="mi">1</span> +</span><span id="MappingSchema-250"><a href="#MappingSchema-250"><span class="linenos">250</span></a> +</span><span id="MappingSchema-251"><a href="#MappingSchema-251"><span class="linenos">251</span></a> <span class="k">def</span> <span class="nf">_ensure_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">:</span> +</span><span id="MappingSchema-252"><a href="#MappingSchema-252"><span class="linenos">252</span></a> <span class="n">table_</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_table</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="MappingSchema-253"><a href="#MappingSchema-253"><span class="linenos">253</span></a> +</span><span id="MappingSchema-254"><a href="#MappingSchema-254"><span class="linenos">254</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_</span><span class="p">:</span> +</span><span id="MappingSchema-255"><a href="#MappingSchema-255"><span class="linenos">255</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Not a valid 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="MappingSchema-256"><a href="#MappingSchema-256"><span class="linenos">256</span></a> +</span><span id="MappingSchema-257"><a href="#MappingSchema-257"><span class="linenos">257</span></a> <span class="k">return</span> <span class="n">table_</span> +</span><span id="MappingSchema-258"><a href="#MappingSchema-258"><span class="linenos">258</span></a> +</span><span id="MappingSchema-259"><a href="#MappingSchema-259"><span class="linenos">259</span></a> <span class="k">def</span> <span class="nf">column_names</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> +</span><span id="MappingSchema-260"><a href="#MappingSchema-260"><span class="linenos">260</span></a> <span class="n">table_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_table</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="MappingSchema-261"><a href="#MappingSchema-261"><span class="linenos">261</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">table_</span><span class="p">)</span> +</span><span id="MappingSchema-262"><a href="#MappingSchema-262"><span class="linenos">262</span></a> +</span><span id="MappingSchema-263"><a href="#MappingSchema-263"><span class="linenos">263</span></a> <span class="k">if</span> <span class="n">schema</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="MappingSchema-264"><a href="#MappingSchema-264"><span class="linenos">264</span></a> <span class="k">return</span> <span class="p">[]</span> +</span><span id="MappingSchema-265"><a href="#MappingSchema-265"><span class="linenos">265</span></a> +</span><span id="MappingSchema-266"><a href="#MappingSchema-266"><span class="linenos">266</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">only_visible</span> <span class="ow">or</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">visible</span><span class="p">:</span> +</span><span id="MappingSchema-267"><a href="#MappingSchema-267"><span class="linenos">267</span></a> <span class="k">return</span> <span class="nb">list</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> +</span><span id="MappingSchema-268"><a href="#MappingSchema-268"><span class="linenos">268</span></a> +</span><span id="MappingSchema-269"><a href="#MappingSchema-269"><span class="linenos">269</span></a> <span class="n">visible</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_nested_get</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">table_parts</span><span class="p">(</span><span class="n">table_</span><span class="p">),</span> <span class="bp">self</span><span class="o">.</span><span class="n">visible</span><span class="p">)</span> +</span><span id="MappingSchema-270"><a href="#MappingSchema-270"><span class="linenos">270</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">col</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">schema</span> <span class="k">if</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">visible</span><span class="p">]</span> <span class="c1"># type: ignore</span> +</span><span id="MappingSchema-271"><a href="#MappingSchema-271"><span class="linenos">271</span></a> +</span><span id="MappingSchema-272"><a href="#MappingSchema-272"><span class="linenos">272</span></a> <span class="k">def</span> <span class="nf">get_column_type</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">column</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span> <span class="o">|</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">:</span> +</span><span id="MappingSchema-273"><a href="#MappingSchema-273"><span class="linenos">273</span></a> <span class="n">column_name</span> <span class="o">=</span> <span class="n">column</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="nb">str</span><span class="p">)</span> <span class="k">else</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> +</span><span id="MappingSchema-274"><a href="#MappingSchema-274"><span class="linenos">274</span></a> <span class="n">table_</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_table</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="MappingSchema-275"><a href="#MappingSchema-275"><span class="linenos">275</span></a> <span class="k">if</span> <span class="n">table_</span><span class="p">:</span> +</span><span id="MappingSchema-276"><a href="#MappingSchema-276"><span class="linenos">276</span></a> <span class="n">table_schema</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">table_</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="MappingSchema-277"><a href="#MappingSchema-277"><span class="linenos">277</span></a> <span class="k">if</span> <span class="n">table_schema</span><span class="p">:</span> +</span><span id="MappingSchema-278"><a href="#MappingSchema-278"><span class="linenos">278</span></a> <span class="n">column_type</span> <span class="o">=</span> <span class="n">table_schema</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="MappingSchema-279"><a href="#MappingSchema-279"><span class="linenos">279</span></a> +</span><span id="MappingSchema-280"><a href="#MappingSchema-280"><span class="linenos">280</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column_type</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">):</span> +</span><span id="MappingSchema-281"><a href="#MappingSchema-281"><span class="linenos">281</span></a> <span class="k">return</span> <span class="n">column_type</span> +</span><span id="MappingSchema-282"><a href="#MappingSchema-282"><span class="linenos">282</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column_type</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span> +</span><span id="MappingSchema-283"><a href="#MappingSchema-283"><span class="linenos">283</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_to_data_type</span><span class="p">(</span><span class="n">column_type</span><span class="o">.</span><span class="n">upper</span><span class="p">())</span> +</span><span id="MappingSchema-284"><a href="#MappingSchema-284"><span class="linenos">284</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown column type '</span><span class="si">{</span><span class="n">column_type</span><span class="si">}</span><span class="s2">'"</span><span class="p">)</span> +</span><span id="MappingSchema-285"><a href="#MappingSchema-285"><span class="linenos">285</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</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">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">UNKNOWN</span><span class="p">)</span> +</span><span id="MappingSchema-286"><a href="#MappingSchema-286"><span class="linenos">286</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Could not convert 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="MappingSchema-287"><a href="#MappingSchema-287"><span class="linenos">287</span></a> +</span><span id="MappingSchema-288"><a href="#MappingSchema-288"><span class="linenos">288</span></a> <span class="k">def</span> <span class="nf">_to_data_type</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">schema_type</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">:</span> +</span><span id="MappingSchema-289"><a href="#MappingSchema-289"><span class="linenos">289</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="MappingSchema-290"><a href="#MappingSchema-290"><span class="linenos">290</span></a><span class="sd"> Convert a type represented as a string to the corresponding :class:`sqlglot.exp.DataType` object.</span> +</span><span id="MappingSchema-291"><a href="#MappingSchema-291"><span class="linenos">291</span></a> +</span><span id="MappingSchema-292"><a href="#MappingSchema-292"><span class="linenos">292</span></a><span class="sd"> Args:</span> +</span><span id="MappingSchema-293"><a href="#MappingSchema-293"><span class="linenos">293</span></a><span class="sd"> schema_type: the type we want to convert.</span> +</span><span id="MappingSchema-294"><a href="#MappingSchema-294"><span class="linenos">294</span></a> +</span><span id="MappingSchema-295"><a href="#MappingSchema-295"><span class="linenos">295</span></a><span class="sd"> Returns:</span> +</span><span id="MappingSchema-296"><a href="#MappingSchema-296"><span class="linenos">296</span></a><span class="sd"> The resulting expression type.</span> +</span><span id="MappingSchema-297"><a href="#MappingSchema-297"><span class="linenos">297</span></a><span class="sd"> """</span> +</span><span id="MappingSchema-298"><a href="#MappingSchema-298"><span class="linenos">298</span></a> <span class="k">if</span> <span class="n">schema_type</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_type_mapping_cache</span><span class="p">:</span> +</span><span id="MappingSchema-299"><a href="#MappingSchema-299"><span class="linenos">299</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="MappingSchema-300"><a href="#MappingSchema-300"><span class="linenos">300</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">maybe_parse</span><span class="p">(</span><span class="n">schema_type</span><span class="p">,</span> <span class="n">into</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">,</span> <span class="n">dialect</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">dialect</span><span class="p">)</span> +</span><span id="MappingSchema-301"><a href="#MappingSchema-301"><span class="linenos">301</span></a> <span class="k">if</span> <span class="n">expression</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="MappingSchema-302"><a href="#MappingSchema-302"><span class="linenos">302</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Could not parse </span><span class="si">{</span><span class="n">schema_type</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="MappingSchema-303"><a href="#MappingSchema-303"><span class="linenos">303</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_type_mapping_cache</span><span class="p">[</span><span class="n">schema_type</span><span class="p">]</span> <span class="o">=</span> <span class="n">expression</span> <span class="c1"># type: ignore</span> +</span><span id="MappingSchema-304"><a href="#MappingSchema-304"><span class="linenos">304</span></a> <span class="k">except</span> <span class="ne">AttributeError</span><span class="p">:</span> +</span><span id="MappingSchema-305"><a href="#MappingSchema-305"><span class="linenos">305</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Failed to convert type </span><span class="si">{</span><span class="n">schema_type</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="MappingSchema-306"><a href="#MappingSchema-306"><span class="linenos">306</span></a> +</span><span id="MappingSchema-307"><a href="#MappingSchema-307"><span class="linenos">307</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_type_mapping_cache</span><span class="p">[</span><span class="n">schema_type</span><span class="p">]</span> +</span></pre></div> + + + <div class="docstring"><p>Schema based on a nested mapping.</p> + +<h6 id="arguments">Arguments:</h6> + +<ul> +<li><strong>schema (dict):</strong> Mapping in one of the following forms: +<ol> +<li>{table: {col: type}}</li> +<li>{db: {table: {col: type}}}</li> +<li>{catalog: {db: {table: {col: type}}}}</li> +<li>None - Tables will be added later</li> +</ol></li> +<li><strong>visible (dict):</strong> Optional mapping of which columns in the schema are visible. If not provided, all columns +are assumed to be visible. The nesting should mirror that of the schema: +<ol> +<li>{table: set(<em>cols)}}</li> +<li>{db: {table: set(</em>cols)}}}</li> +<li>{catalog: {db: {table: set(*cols)}}}}</li> +</ol></li> +<li><strong>dialect (str):</strong> The dialect to be used for custom type mappings.</li> +</ul> +</div> + + + <div id="MappingSchema.__init__" class="classattr"> + <input id="MappingSchema.__init__-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + + <span class="name">MappingSchema</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">schema</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">visible</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">dialect</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n"><a href="dialects/dialect.html#Dialect">sqlglot.dialects.dialect.Dialect</a></span><span class="p">,</span> <span class="n">Type</span><span class="p">[</span><span class="n"><a href="dialects/dialect.html#Dialect">sqlglot.dialects.dialect.Dialect</a></span><span class="p">],</span> <span class="n">NoneType</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span></span>)</span> + + <label class="view-source-button" for="MappingSchema.__init__-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#MappingSchema.__init__"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="MappingSchema.__init__-154"><a href="#MappingSchema.__init__-154"><span class="linenos">154</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> +</span><span id="MappingSchema.__init__-155"><a href="#MappingSchema.__init__-155"><span class="linenos">155</span></a> <span class="bp">self</span><span class="p">,</span> +</span><span id="MappingSchema.__init__-156"><a href="#MappingSchema.__init__-156"><span class="linenos">156</span></a> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="MappingSchema.__init__-157"><a href="#MappingSchema.__init__-157"><span class="linenos">157</span></a> <span class="n">visible</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="MappingSchema.__init__-158"><a href="#MappingSchema.__init__-158"><span class="linenos">158</span></a> <span class="n">dialect</span><span class="p">:</span> <span class="n">DialectType</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="MappingSchema.__init__-159"><a href="#MappingSchema.__init__-159"><span class="linenos">159</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="MappingSchema.__init__-160"><a href="#MappingSchema.__init__-160"><span class="linenos">160</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">dialect</span> <span class="o">=</span> <span class="n">dialect</span> +</span><span id="MappingSchema.__init__-161"><a href="#MappingSchema.__init__-161"><span class="linenos">161</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">visible</span> <span class="o">=</span> <span class="n">visible</span> <span class="ow">or</span> <span class="p">{}</span> +</span><span id="MappingSchema.__init__-162"><a href="#MappingSchema.__init__-162"><span class="linenos">162</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_type_mapping_cache</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="MappingSchema.__init__-163"><a href="#MappingSchema.__init__-163"><span class="linenos">163</span></a> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_normalize</span><span class="p">(</span><span class="n">schema</span> <span class="ow">or</span> <span class="p">{}))</span> +</span></pre></div> + + + + + </div> + <div id="MappingSchema.from_mapping_schema" class="classattr"> + <input id="MappingSchema.from_mapping_schema-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + <div class="decorator">@classmethod</div> + + <span class="def">def</span> + <span class="name">from_mapping_schema</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="bp">cls</span>,</span><span class="param"> <span class="n">mapping_schema</span><span class="p">:</span> <span class="n"><a href="#MappingSchema">sqlglot.schema.MappingSchema</a></span></span><span class="return-annotation">) -> <span class="n"><a href="#MappingSchema">sqlglot.schema.MappingSchema</a></span>:</span></span> + + <label class="view-source-button" for="MappingSchema.from_mapping_schema-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#MappingSchema.from_mapping_schema"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="MappingSchema.from_mapping_schema-165"><a href="#MappingSchema.from_mapping_schema-165"><span class="linenos">165</span></a> <span class="nd">@classmethod</span> +</span><span id="MappingSchema.from_mapping_schema-166"><a href="#MappingSchema.from_mapping_schema-166"><span class="linenos">166</span></a> <span class="k">def</span> <span class="nf">from_mapping_schema</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">mapping_schema</span><span class="p">:</span> <span class="n">MappingSchema</span><span class="p">)</span> <span class="o">-></span> <span class="n">MappingSchema</span><span class="p">:</span> +</span><span id="MappingSchema.from_mapping_schema-167"><a href="#MappingSchema.from_mapping_schema-167"><span class="linenos">167</span></a> <span class="k">return</span> <span class="n">MappingSchema</span><span class="p">(</span> +</span><span id="MappingSchema.from_mapping_schema-168"><a href="#MappingSchema.from_mapping_schema-168"><span class="linenos">168</span></a> <span class="n">schema</span><span class="o">=</span><span class="n">mapping_schema</span><span class="o">.</span><span class="n">mapping</span><span class="p">,</span> +</span><span id="MappingSchema.from_mapping_schema-169"><a href="#MappingSchema.from_mapping_schema-169"><span class="linenos">169</span></a> <span class="n">visible</span><span class="o">=</span><span class="n">mapping_schema</span><span class="o">.</span><span class="n">visible</span><span class="p">,</span> +</span><span id="MappingSchema.from_mapping_schema-170"><a href="#MappingSchema.from_mapping_schema-170"><span class="linenos">170</span></a> <span class="n">dialect</span><span class="o">=</span><span class="n">mapping_schema</span><span class="o">.</span><span class="n">dialect</span><span class="p">,</span> +</span><span id="MappingSchema.from_mapping_schema-171"><a href="#MappingSchema.from_mapping_schema-171"><span class="linenos">171</span></a> <span class="p">)</span> +</span></pre></div> + + + + + </div> + <div id="MappingSchema.copy" class="classattr"> + <input id="MappingSchema.copy-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">copy</span><span class="signature pdoc-code condensed">(<span class="param"><span class="bp">self</span>, </span><span class="param"><span class="o">**</span><span class="n">kwargs</span></span><span class="return-annotation">) -> <span class="n"><a href="#MappingSchema">sqlglot.schema.MappingSchema</a></span>:</span></span> + + <label class="view-source-button" for="MappingSchema.copy-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#MappingSchema.copy"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="MappingSchema.copy-173"><a href="#MappingSchema.copy-173"><span class="linenos">173</span></a> <span class="k">def</span> <span class="nf">copy</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> <span class="o">-></span> <span class="n">MappingSchema</span><span class="p">:</span> +</span><span id="MappingSchema.copy-174"><a href="#MappingSchema.copy-174"><span class="linenos">174</span></a> <span class="k">return</span> <span class="n">MappingSchema</span><span class="p">(</span> +</span><span id="MappingSchema.copy-175"><a href="#MappingSchema.copy-175"><span class="linenos">175</span></a> <span class="o">**</span><span class="p">{</span> <span class="c1"># type: ignore</span> +</span><span id="MappingSchema.copy-176"><a href="#MappingSchema.copy-176"><span class="linenos">176</span></a> <span class="s2">"schema"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> +</span><span id="MappingSchema.copy-177"><a href="#MappingSchema.copy-177"><span class="linenos">177</span></a> <span class="s2">"visible"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">visible</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> +</span><span id="MappingSchema.copy-178"><a href="#MappingSchema.copy-178"><span class="linenos">178</span></a> <span class="s2">"dialect"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">dialect</span><span class="p">,</span> +</span><span id="MappingSchema.copy-179"><a href="#MappingSchema.copy-179"><span class="linenos">179</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> +</span><span id="MappingSchema.copy-180"><a href="#MappingSchema.copy-180"><span class="linenos">180</span></a> <span class="p">}</span> +</span><span id="MappingSchema.copy-181"><a href="#MappingSchema.copy-181"><span class="linenos">181</span></a> <span class="p">)</span> +</span></pre></div> + + + + + </div> + <div id="MappingSchema.add_table" class="classattr"> + <input id="MappingSchema.add_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">add_table</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="bp">self</span>,</span><span class="param"> <span class="n">table</span><span class="p">:</span> <span class="n"><a href="expressions.html#Table">sqlglot.expressions.Table</a></span> <span class="o">|</span> <span class="nb">str</span>,</span><span class="param"> <span class="n">column_mapping</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Dict</span><span class="p">,</span> <span class="nb">str</span><span class="p">,</span> <span class="n">sqlglot</span><span class="o">.</span><span class="n">dataframe</span><span class="o">.</span><span class="n">sql</span><span class="o">.</span><span class="n">types</span><span class="o">.</span><span class="n">StructType</span><span class="p">,</span> <span class="n">List</span><span class="p">,</span> <span class="n">NoneType</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span></span><span class="return-annotation">) -> <span class="kc">None</span>:</span></span> + + <label class="view-source-button" for="MappingSchema.add_table-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#MappingSchema.add_table"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="MappingSchema.add_table-210"><a href="#MappingSchema.add_table-210"><span class="linenos">210</span></a> <span class="k">def</span> <span class="nf">add_table</span><span class="p">(</span> +</span><span id="MappingSchema.add_table-211"><a href="#MappingSchema.add_table-211"><span class="linenos">211</span></a> <span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">column_mapping</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">ColumnMapping</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="MappingSchema.add_table-212"><a href="#MappingSchema.add_table-212"><span class="linenos">212</span></a> <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="MappingSchema.add_table-213"><a href="#MappingSchema.add_table-213"><span class="linenos">213</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="MappingSchema.add_table-214"><a href="#MappingSchema.add_table-214"><span class="linenos">214</span></a><span class="sd"> Register or update a table. Updates are only performed if a new column mapping is provided.</span> +</span><span id="MappingSchema.add_table-215"><a href="#MappingSchema.add_table-215"><span class="linenos">215</span></a> +</span><span id="MappingSchema.add_table-216"><a href="#MappingSchema.add_table-216"><span class="linenos">216</span></a><span class="sd"> Args:</span> +</span><span id="MappingSchema.add_table-217"><a href="#MappingSchema.add_table-217"><span class="linenos">217</span></a><span class="sd"> table: the `Table` expression instance or string representing the table.</span> +</span><span id="MappingSchema.add_table-218"><a href="#MappingSchema.add_table-218"><span class="linenos">218</span></a><span class="sd"> column_mapping: a column mapping that describes the structure of the table.</span> +</span><span id="MappingSchema.add_table-219"><a href="#MappingSchema.add_table-219"><span class="linenos">219</span></a><span class="sd"> """</span> +</span><span id="MappingSchema.add_table-220"><a href="#MappingSchema.add_table-220"><span class="linenos">220</span></a> <span class="n">table_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_table</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="MappingSchema.add_table-221"><a href="#MappingSchema.add_table-221"><span class="linenos">221</span></a> <span class="n">column_mapping</span> <span class="o">=</span> <span class="n">ensure_column_mapping</span><span class="p">(</span><span class="n">column_mapping</span><span class="p">)</span> +</span><span id="MappingSchema.add_table-222"><a href="#MappingSchema.add_table-222"><span class="linenos">222</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">table_</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="MappingSchema.add_table-223"><a href="#MappingSchema.add_table-223"><span class="linenos">223</span></a> +</span><span id="MappingSchema.add_table-224"><a href="#MappingSchema.add_table-224"><span class="linenos">224</span></a> <span class="k">if</span> <span class="n">schema</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">column_mapping</span><span class="p">:</span> +</span><span id="MappingSchema.add_table-225"><a href="#MappingSchema.add_table-225"><span class="linenos">225</span></a> <span class="k">return</span> +</span><span id="MappingSchema.add_table-226"><a href="#MappingSchema.add_table-226"><span class="linenos">226</span></a> +</span><span id="MappingSchema.add_table-227"><a href="#MappingSchema.add_table-227"><span class="linenos">227</span></a> <span class="n">_nested_set</span><span class="p">(</span> +</span><span id="MappingSchema.add_table-228"><a href="#MappingSchema.add_table-228"><span class="linenos">228</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">,</span> +</span><span id="MappingSchema.add_table-229"><a href="#MappingSchema.add_table-229"><span class="linenos">229</span></a> <span class="nb">list</span><span class="p">(</span><span class="nb">reversed</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">table_parts</span><span class="p">(</span><span class="n">table_</span><span class="p">))),</span> +</span><span id="MappingSchema.add_table-230"><a href="#MappingSchema.add_table-230"><span class="linenos">230</span></a> <span class="n">column_mapping</span><span class="p">,</span> +</span><span id="MappingSchema.add_table-231"><a href="#MappingSchema.add_table-231"><span class="linenos">231</span></a> <span class="p">)</span> +</span><span id="MappingSchema.add_table-232"><a href="#MappingSchema.add_table-232"><span class="linenos">232</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">mapping_trie</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_build_trie</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mapping</span><span class="p">)</span> +</span></pre></div> + + + <div class="docstring"><p>Register or update a table. Updates are only performed if a new column mapping is provided.</p> + +<h6 id="arguments">Arguments:</h6> + +<ul> +<li><strong>table:</strong> the <code>Table</code> expression instance or string representing the table.</li> +<li><strong>column_mapping:</strong> a column mapping that describes the structure of the table.</li> +</ul> +</div> + + + </div> + <div id="MappingSchema.column_names" class="classattr"> + <input id="MappingSchema.column_names-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">column_names</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="bp">self</span>,</span><span class="param"> <span class="n">table</span><span class="p">:</span> <span class="n"><a href="expressions.html#Table">sqlglot.expressions.Table</a></span> <span class="o">|</span> <span class="nb">str</span>,</span><span class="param"> <span class="n">only_visible</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span></span><span class="return-annotation">) -> <span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span>:</span></span> + + <label class="view-source-button" for="MappingSchema.column_names-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#MappingSchema.column_names"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="MappingSchema.column_names-259"><a href="#MappingSchema.column_names-259"><span class="linenos">259</span></a> <span class="k">def</span> <span class="nf">column_names</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> +</span><span id="MappingSchema.column_names-260"><a href="#MappingSchema.column_names-260"><span class="linenos">260</span></a> <span class="n">table_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_table</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="MappingSchema.column_names-261"><a href="#MappingSchema.column_names-261"><span class="linenos">261</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">table_</span><span class="p">)</span> +</span><span id="MappingSchema.column_names-262"><a href="#MappingSchema.column_names-262"><span class="linenos">262</span></a> +</span><span id="MappingSchema.column_names-263"><a href="#MappingSchema.column_names-263"><span class="linenos">263</span></a> <span class="k">if</span> <span class="n">schema</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="MappingSchema.column_names-264"><a href="#MappingSchema.column_names-264"><span class="linenos">264</span></a> <span class="k">return</span> <span class="p">[]</span> +</span><span id="MappingSchema.column_names-265"><a href="#MappingSchema.column_names-265"><span class="linenos">265</span></a> +</span><span id="MappingSchema.column_names-266"><a href="#MappingSchema.column_names-266"><span class="linenos">266</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">only_visible</span> <span class="ow">or</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">visible</span><span class="p">:</span> +</span><span id="MappingSchema.column_names-267"><a href="#MappingSchema.column_names-267"><span class="linenos">267</span></a> <span class="k">return</span> <span class="nb">list</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> +</span><span id="MappingSchema.column_names-268"><a href="#MappingSchema.column_names-268"><span class="linenos">268</span></a> +</span><span id="MappingSchema.column_names-269"><a href="#MappingSchema.column_names-269"><span class="linenos">269</span></a> <span class="n">visible</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_nested_get</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">table_parts</span><span class="p">(</span><span class="n">table_</span><span class="p">),</span> <span class="bp">self</span><span class="o">.</span><span class="n">visible</span><span class="p">)</span> +</span><span id="MappingSchema.column_names-270"><a href="#MappingSchema.column_names-270"><span class="linenos">270</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">col</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">schema</span> <span class="k">if</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">visible</span><span class="p">]</span> <span class="c1"># type: ignore</span> +</span></pre></div> + + + <div class="docstring"><p>Get the column names for a table.</p> + +<h6 id="arguments">Arguments:</h6> + +<ul> +<li><strong>table:</strong> the <code>Table</code> expression instance.</li> +<li><strong>only_visible:</strong> whether to include invisible columns.</li> +</ul> + +<h6 id="returns">Returns:</h6> + +<blockquote> + <p>The list of column names.</p> +</blockquote> +</div> + + + </div> + <div id="MappingSchema.get_column_type" class="classattr"> + <input id="MappingSchema.get_column_type-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_column_type</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="bp">self</span>,</span><span class="param"> <span class="n">table</span><span class="p">:</span> <span class="n"><a href="expressions.html#Table">sqlglot.expressions.Table</a></span> <span class="o">|</span> <span class="nb">str</span>,</span><span class="param"> <span class="n">column</span><span class="p">:</span> <span class="n"><a href="expressions.html#Column">sqlglot.expressions.Column</a></span> <span class="o">|</span> <span class="nb">str</span></span><span class="return-annotation">) -> <span class="n"><a href="expressions.html#DataType">sqlglot.expressions.DataType</a></span>:</span></span> + + <label class="view-source-button" for="MappingSchema.get_column_type-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#MappingSchema.get_column_type"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="MappingSchema.get_column_type-272"><a href="#MappingSchema.get_column_type-272"><span class="linenos">272</span></a> <span class="k">def</span> <span class="nf">get_column_type</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span> <span class="o">|</span> <span class="nb">str</span><span class="p">,</span> <span class="n">column</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span> <span class="o">|</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">:</span> +</span><span id="MappingSchema.get_column_type-273"><a href="#MappingSchema.get_column_type-273"><span class="linenos">273</span></a> <span class="n">column_name</span> <span class="o">=</span> <span class="n">column</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="nb">str</span><span class="p">)</span> <span class="k">else</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> +</span><span id="MappingSchema.get_column_type-274"><a href="#MappingSchema.get_column_type-274"><span class="linenos">274</span></a> <span class="n">table_</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_table</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="MappingSchema.get_column_type-275"><a href="#MappingSchema.get_column_type-275"><span class="linenos">275</span></a> <span class="k">if</span> <span class="n">table_</span><span class="p">:</span> +</span><span id="MappingSchema.get_column_type-276"><a href="#MappingSchema.get_column_type-276"><span class="linenos">276</span></a> <span class="n">table_schema</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">table_</span><span class="p">,</span> <span class="n">raise_on_missing</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="MappingSchema.get_column_type-277"><a href="#MappingSchema.get_column_type-277"><span class="linenos">277</span></a> <span class="k">if</span> <span class="n">table_schema</span><span class="p">:</span> +</span><span id="MappingSchema.get_column_type-278"><a href="#MappingSchema.get_column_type-278"><span class="linenos">278</span></a> <span class="n">column_type</span> <span class="o">=</span> <span class="n">table_schema</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="MappingSchema.get_column_type-279"><a href="#MappingSchema.get_column_type-279"><span class="linenos">279</span></a> +</span><span id="MappingSchema.get_column_type-280"><a href="#MappingSchema.get_column_type-280"><span class="linenos">280</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column_type</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="p">):</span> +</span><span id="MappingSchema.get_column_type-281"><a href="#MappingSchema.get_column_type-281"><span class="linenos">281</span></a> <span class="k">return</span> <span class="n">column_type</span> +</span><span id="MappingSchema.get_column_type-282"><a href="#MappingSchema.get_column_type-282"><span class="linenos">282</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column_type</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span> +</span><span id="MappingSchema.get_column_type-283"><a href="#MappingSchema.get_column_type-283"><span class="linenos">283</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_to_data_type</span><span class="p">(</span><span class="n">column_type</span><span class="o">.</span><span class="n">upper</span><span class="p">())</span> +</span><span id="MappingSchema.get_column_type-284"><a href="#MappingSchema.get_column_type-284"><span class="linenos">284</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown column type '</span><span class="si">{</span><span class="n">column_type</span><span class="si">}</span><span class="s2">'"</span><span class="p">)</span> +</span><span id="MappingSchema.get_column_type-285"><a href="#MappingSchema.get_column_type-285"><span class="linenos">285</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</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">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">UNKNOWN</span><span class="p">)</span> +</span><span id="MappingSchema.get_column_type-286"><a href="#MappingSchema.get_column_type-286"><span class="linenos">286</span></a> <span class="k">raise</span> <span class="n">SchemaError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Could not convert table '</span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2">'"</span><span class="p">)</span> +</span></pre></div> + + + <div class="docstring"><p>Get the <code>sqlglot.exp.DataType</code> type of a column in the schema.</p> + +<h6 id="arguments">Arguments:</h6> + +<ul> +<li><strong>table:</strong> the source table.</li> +<li><strong>column:</strong> the target column.</li> +</ul> + +<h6 id="returns">Returns:</h6> + +<blockquote> + <p>The resulting column type.</p> +</blockquote> +</div> + + + </div> + <div class="inherited"> + <h5>Inherited Members</h5> + <dl> + <div><dt><a href="#AbstractMappingSchema">AbstractMappingSchema</a></dt> + <dd id="MappingSchema.supported_table_args" class="variable"><a href="#AbstractMappingSchema.supported_table_args">supported_table_args</a></dd> + <dd id="MappingSchema.table_parts" class="function"><a href="#AbstractMappingSchema.table_parts">table_parts</a></dd> + <dd id="MappingSchema.find" class="function"><a href="#AbstractMappingSchema.find">find</a></dd> + + </div> + </dl> + </div> + </section> + <section id="ensure_schema"> + <input id="ensure_schema-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + + <span class="def">def</span> + <span class="name">ensure_schema</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">schema</span><span class="p">:</span> <span class="n">Any</span></span><span class="return-annotation">) -> <span class="n"><a href="#Schema">sqlglot.schema.Schema</a></span>:</span></span> + + <label class="view-source-button" for="ensure_schema-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#ensure_schema"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="ensure_schema-310"><a href="#ensure_schema-310"><span class="linenos">310</span></a><span class="k">def</span> <span class="nf">ensure_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Any</span><span class="p">)</span> <span class="o">-></span> <span class="n">Schema</span><span class="p">:</span> +</span><span id="ensure_schema-311"><a href="#ensure_schema-311"><span class="linenos">311</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">schema</span><span class="p">,</span> <span class="n">Schema</span><span class="p">):</span> +</span><span id="ensure_schema-312"><a href="#ensure_schema-312"><span class="linenos">312</span></a> <span class="k">return</span> <span class="n">schema</span> +</span><span id="ensure_schema-313"><a href="#ensure_schema-313"><span class="linenos">313</span></a> +</span><span id="ensure_schema-314"><a href="#ensure_schema-314"><span class="linenos">314</span></a> <span class="k">return</span> <span class="n">MappingSchema</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> +</span></pre></div> + + + + + </section> + <section id="ensure_column_mapping"> + <input id="ensure_column_mapping-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> +<div class="attr function"> + + <span class="def">def</span> + <span class="name">ensure_column_mapping</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">mapping</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Dict</span><span class="p">,</span> <span class="nb">str</span><span class="p">,</span> <span class="n">sqlglot</span><span class="o">.</span><span class="n">dataframe</span><span class="o">.</span><span class="n">sql</span><span class="o">.</span><span class="n">types</span><span class="o">.</span><span class="n">StructType</span><span class="p">,</span> <span class="n">List</span><span class="p">,</span> <span class="n">NoneType</span><span class="p">]</span></span><span class="return-annotation">):</span></span> + + <label class="view-source-button" for="ensure_column_mapping-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#ensure_column_mapping"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="ensure_column_mapping-317"><a href="#ensure_column_mapping-317"><span class="linenos">317</span></a><span class="k">def</span> <span class="nf">ensure_column_mapping</span><span class="p">(</span><span class="n">mapping</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">ColumnMapping</span><span class="p">]):</span> +</span><span id="ensure_column_mapping-318"><a href="#ensure_column_mapping-318"><span class="linenos">318</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">mapping</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span> +</span><span id="ensure_column_mapping-319"><a href="#ensure_column_mapping-319"><span class="linenos">319</span></a> <span class="k">return</span> <span class="n">mapping</span> +</span><span id="ensure_column_mapping-320"><a href="#ensure_column_mapping-320"><span class="linenos">320</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">mapping</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span> +</span><span id="ensure_column_mapping-321"><a href="#ensure_column_mapping-321"><span class="linenos">321</span></a> <span class="n">col_name_type_strs</span> <span class="o">=</span> <span class="p">[</span><span class="n">x</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">mapping</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">","</span><span class="p">)]</span> +</span><span id="ensure_column_mapping-322"><a href="#ensure_column_mapping-322"><span class="linenos">322</span></a> <span class="k">return</span> <span class="p">{</span> +</span><span id="ensure_column_mapping-323"><a href="#ensure_column_mapping-323"><span class="linenos">323</span></a> <span class="n">name_type_str</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">":"</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">strip</span><span class="p">():</span> <span class="n">name_type_str</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">":"</span><span class="p">)[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span> +</span><span id="ensure_column_mapping-324"><a href="#ensure_column_mapping-324"><span class="linenos">324</span></a> <span class="k">for</span> <span class="n">name_type_str</span> <span class="ow">in</span> <span class="n">col_name_type_strs</span> +</span><span id="ensure_column_mapping-325"><a href="#ensure_column_mapping-325"><span class="linenos">325</span></a> <span class="p">}</span> +</span><span id="ensure_column_mapping-326"><a href="#ensure_column_mapping-326"><span class="linenos">326</span></a> <span class="c1"># Check if mapping looks like a DataFrame StructType</span> +</span><span id="ensure_column_mapping-327"><a href="#ensure_column_mapping-327"><span class="linenos">327</span></a> <span class="k">elif</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">mapping</span><span class="p">,</span> <span class="s2">"simpleString"</span><span class="p">):</span> +</span><span id="ensure_column_mapping-328"><a href="#ensure_column_mapping-328"><span class="linenos">328</span></a> <span class="k">return</span> <span class="p">{</span><span class="n">struct_field</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> <span class="n">struct_field</span><span class="o">.</span><span class="n">dataType</span><span class="o">.</span><span class="n">simpleString</span><span class="p">()</span> <span class="k">for</span> <span class="n">struct_field</span> <span class="ow">in</span> <span class="n">mapping</span><span class="p">}</span> <span class="c1"># type: ignore</span> +</span><span id="ensure_column_mapping-329"><a href="#ensure_column_mapping-329"><span class="linenos">329</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">mapping</span><span class="p">,</span> <span class="nb">list</span><span class="p">):</span> +</span><span id="ensure_column_mapping-330"><a href="#ensure_column_mapping-330"><span class="linenos">330</span></a> <span class="k">return</span> <span class="p">{</span><span class="n">x</span><span class="o">.</span><span class="n">strip</span><span class="p">():</span> <span class="kc">None</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">mapping</span><span class="p">}</span> +</span><span id="ensure_column_mapping-331"><a href="#ensure_column_mapping-331"><span class="linenos">331</span></a> <span class="k">elif</span> <span class="n">mapping</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="ensure_column_mapping-332"><a href="#ensure_column_mapping-332"><span class="linenos">332</span></a> <span class="k">return</span> <span class="p">{}</span> +</span><span id="ensure_column_mapping-333"><a href="#ensure_column_mapping-333"><span class="linenos">333</span></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Invalid mapping provided: </span><span class="si">{</span><span class="nb">type</span><span class="p">(</span><span class="n">mapping</span><span class="p">)</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span></pre></div> + + + + + </section> + <section id="flatten_schema"> + <input id="flatten_schema-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">flatten_schema</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">schema</span><span class="p">:</span> <span class="n">Dict</span>,</span><span class="param"> <span class="n">depth</span><span class="p">:</span> <span class="nb">int</span>,</span><span class="param"> <span class="n">keys</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span></span><span class="return-annotation">) -> <span class="n">List</span><span class="p">[</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span>:</span></span> + + <label class="view-source-button" for="flatten_schema-view-source"><span>View Source</span></label> + + </div> + <a class="headerlink" href="#flatten_schema"></a> + <div class="pdoc-code codehilite"><pre><span></span><span id="flatten_schema-336"><a href="#flatten_schema-336"><span class="linenos">336</span></a><span class="k">def</span> <span class="nf">flatten_schema</span><span class="p">(</span> +</span><span id="flatten_schema-337"><a href="#flatten_schema-337"><span class="linenos">337</span></a> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">,</span> <span class="n">depth</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">keys</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="flatten_schema-338"><a href="#flatten_schema-338"><span class="linenos">338</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]]:</span> +</span><span id="flatten_schema-339"><a href="#flatten_schema-339"><span class="linenos">339</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="flatten_schema-340"><a href="#flatten_schema-340"><span class="linenos">340</span></a> <span class="n">keys</span> <span class="o">=</span> <span class="n">keys</span> <span class="ow">or</span> <span class="p">[]</span> +</span><span id="flatten_schema-341"><a href="#flatten_schema-341"><span class="linenos">341</span></a> +</span><span id="flatten_schema-342"><a href="#flatten_schema-342"><span class="linenos">342</span></a> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">schema</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="flatten_schema-343"><a href="#flatten_schema-343"><span class="linenos">343</span></a> <span class="k">if</span> <span class="n">depth</span> <span class="o">>=</span> <span class="mi">2</span><span class="p">:</span> +</span><span id="flatten_schema-344"><a href="#flatten_schema-344"><span class="linenos">344</span></a> <span class="n">tables</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">flatten_schema</span><span class="p">(</span><span class="n">v</span><span class="p">,</span> <span class="n">depth</span> <span class="o">-</span> <span class="mi">1</span><span class="p">,</span> <span class="n">keys</span> <span class="o">+</span> <span class="p">[</span><span class="n">k</span><span class="p">]))</span> +</span><span id="flatten_schema-345"><a href="#flatten_schema-345"><span class="linenos">345</span></a> <span class="k">elif</span> <span class="n">depth</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="flatten_schema-346"><a href="#flatten_schema-346"><span class="linenos">346</span></a> <span class="n">tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">keys</span> <span class="o">+</span> <span class="p">[</span><span class="n">k</span><span class="p">])</span> +</span><span id="flatten_schema-347"><a href="#flatten_schema-347"><span class="linenos">347</span></a> <span class="k">return</span> <span class="n">tables</span> +</span></pre></div> + + + + + </section> + </main> +<script> + function escapeHTML(html) { + return document.createElement('div').appendChild(document.createTextNode(html)).parentNode.innerHTML; + } + + const originalContent = document.querySelector("main.pdoc"); + let currentContent = originalContent; + + function setContent(innerHTML) { + let elem; + if (innerHTML) { + elem = document.createElement("main"); + elem.classList.add("pdoc"); + elem.innerHTML = innerHTML; + } 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"s" : ""} for '${escapeHTML(term)}'.</h4>`; + } + for (let result of results.slice(0, 10)) { + let doc = result.doc; + let url = `../${doc.modulename.replaceAll(".", "/")}.html`; + if (doc.qualname) { + url += `#${doc.qualname}`; + } + + let heading; + switch (result.doc.kind) { + case "function": + if (doc.fullname.endsWith(".__init__")) { + heading = `<span class="name">${doc.fullname.replace(/\.__init__$/, "")}</span>${doc.signature}`; + } else { + heading = `<span class="def">${doc.funcdef}</span> <span class="name">${doc.fullname}</span>${doc.signature}`; + } + break; + case "class": + heading = `<span class="def">class</span> <span class="name">${doc.fullname}</span>`; + if (doc.bases) + heading += `<wbr>(<span class="base">${doc.bases}</span>)`; + heading += `:`; + break; + case "variable": + heading = `<span class="name">${doc.fullname}</span>`; + if (doc.annotation) + heading += `<span class="annotation">${doc.annotation}</span>`; + if (doc.default_value) + heading += `<span class="default_value">${doc.default_value}</span>`; + break; + default: + heading = `<span class="name">${doc.fullname}</span>`; + break; + } + html += ` + <section class="search-result"> + <a href="${url}" class="attr ${doc.kind}">${heading}</a> + <div class="docstring">${doc.doc}</div> + </section> + `; + + } + return html; + })()); + } + + if (getSearchTerm()) { + initialize(); + searchBox.value = getSearchTerm(); + onInput(); + } else { + searchBox.addEventListener("focus", initialize, {once: true}); + } + + searchBox.addEventListener("keydown", e => { + if (["ArrowDown", "ArrowUp", "Enter"].includes(e.key)) { + let focused = currentContent.querySelector(".search-result.focused"); + if (!focused) { + currentContent.querySelector(".search-result").classList.add("focused"); + } else if ( + e.key === "ArrowDown" + && focused.nextElementSibling + && focused.nextElementSibling.classList.contains("search-result") + ) { + focused.classList.remove("focused"); + focused.nextElementSibling.classList.add("focused"); + focused.nextElementSibling.scrollIntoView({ + behavior: "smooth", + block: "nearest", + inline: "nearest" + }); + } else if ( + e.key === "ArrowUp" + && focused.previousElementSibling + && focused.previousElementSibling.classList.contains("search-result") + ) { + focused.classList.remove("focused"); + focused.previousElementSibling.classList.add("focused"); + focused.previousElementSibling.scrollIntoView({ + behavior: "smooth", + block: "nearest", + inline: "nearest" + }); + } else if ( + e.key === "Enter" + ) { + focused.querySelector("a").click(); + } + } + }); +</script></body> +</html>
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