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| <section id="module-apache_beam.transforms.enrichment_handlers.bigquery"> |
| <span id="apache-beam-transforms-enrichment-handlers-bigquery-module"></span><h1>apache_beam.transforms.enrichment_handlers.bigquery module<a class="headerlink" href="#module-apache_beam.transforms.enrichment_handlers.bigquery" title="Link to this heading"></a></h1> |
| <dl class="py class"> |
| <dt class="sig sig-object py" id="apache_beam.transforms.enrichment_handlers.bigquery.BigQueryEnrichmentHandler"> |
| <em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">apache_beam.transforms.enrichment_handlers.bigquery.</span></span><span class="sig-name descname"><span class="pre">BigQueryEnrichmentHandler</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">project</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">table_name</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">''</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">row_restriction_template</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">''</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fields</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#list" title="(in Python v3.13)"><span class="pre">list</span></a><span class="p"><span class="pre">[</span></span><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a><span class="p"><span class="pre">]</span></span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/constants.html#None" title="(in Python v3.13)"><span class="pre">None</span></a></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">column_names</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#list" title="(in Python v3.13)"><span class="pre">list</span></a><span class="p"><span class="pre">[</span></span><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a><span class="p"><span class="pre">]</span></span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/constants.html#None" title="(in Python v3.13)"><span class="pre">None</span></a></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">condition_value_fn</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/collections.abc.html#collections.abc.Callable" title="(in Python v3.13)"><span class="pre">Callable</span></a><span class="p"><span class="pre">[</span></span><span class="p"><span class="pre">[</span></span><a class="reference internal" href="apache_beam.pvalue.html#apache_beam.pvalue.Row" title="apache_beam.pvalue.Row"><span class="pre">Row</span></a><span class="p"><span class="pre">]</span></span><span class="p"><span class="pre">,</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#list" title="(in Python v3.13)"><span class="pre">list</span></a><span class="p"><span class="pre">[</span></span><a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Any" title="(in Python v3.13)"><span class="pre">Any</span></a><span class="p"><span class="pre">]</span></span><span class="p"><span class="pre">]</span></span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/constants.html#None" title="(in Python v3.13)"><span class="pre">None</span></a></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">query_fn</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/collections.abc.html#collections.abc.Callable" title="(in Python v3.13)"><span class="pre">Callable</span></a><span class="p"><span class="pre">[</span></span><span class="p"><span class="pre">[</span></span><a class="reference internal" href="apache_beam.pvalue.html#apache_beam.pvalue.Row" title="apache_beam.pvalue.Row"><span class="pre">Row</span></a><span class="p"><span class="pre">]</span></span><span class="p"><span class="pre">,</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a><span class="p"><span class="pre">]</span></span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/constants.html#None" title="(in Python v3.13)"><span class="pre">None</span></a></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">min_batch_size</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.13)"><span class="pre">int</span></a></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">1</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">max_batch_size</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.13)"><span class="pre">int</span></a></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">10000</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/enrichment_handlers/bigquery.html#BigQueryEnrichmentHandler"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.transforms.enrichment_handlers.bigquery.BigQueryEnrichmentHandler" title="Link to this definition"></a></dt> |
| <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.enrichment.html#apache_beam.transforms.enrichment.EnrichmentSourceHandler" title="apache_beam.transforms.enrichment.EnrichmentSourceHandler"><code class="xref py py-class docutils literal notranslate"><span class="pre">EnrichmentSourceHandler</span></code></a>[<a class="reference internal" href="apache_beam.pvalue.html#apache_beam.pvalue.Row" title="apache_beam.pvalue.Row"><code class="xref py py-class docutils literal notranslate"><span class="pre">Row</span></code></a> | <a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#list" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">list</span></code></a>[<a class="reference internal" href="apache_beam.pvalue.html#apache_beam.pvalue.Row" title="apache_beam.pvalue.Row"><code class="xref py py-class docutils literal notranslate"><span class="pre">Row</span></code></a>], <a class="reference internal" href="apache_beam.pvalue.html#apache_beam.pvalue.Row" title="apache_beam.pvalue.Row"><code class="xref py py-class docutils literal notranslate"><span class="pre">Row</span></code></a> | <a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#list" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">list</span></code></a>[<a class="reference internal" href="apache_beam.pvalue.html#apache_beam.pvalue.Row" title="apache_beam.pvalue.Row"><code class="xref py py-class docutils literal notranslate"><span class="pre">Row</span></code></a>]]</p> |
| <p>Enrichment handler for Google Cloud BigQuery.</p> |
| <p>Use this handler with <a class="reference internal" href="apache_beam.transforms.enrichment.html#apache_beam.transforms.enrichment.Enrichment" title="apache_beam.transforms.enrichment.Enrichment"><code class="xref py py-class docutils literal notranslate"><span class="pre">apache_beam.transforms.enrichment.Enrichment</span></code></a> |
| transform.</p> |
| <dl class="simple"> |
| <dt>To use this handler you need either of the following combinations:</dt><dd><ul class="simple"> |
| <li><p><cite>table_name</cite>, <cite>row_restriction_template</cite>, <cite>fields</cite></p></li> |
| <li><p><cite>table_name</cite>, <cite>row_restriction_template</cite>, <cite>condition_value_fn</cite></p></li> |
| <li><p><cite>query_fn</cite></p></li> |
| </ul> |
| </dd> |
| </dl> |
| <p>By default, the handler pulls all columns from the BigQuery table. |
| To override this, use the <cite>column_name</cite> parameter to specify a list of column |
| names to fetch.</p> |
| <p>This handler pulls data from BigQuery per element by default. To change this |
| behavior, set the <cite>min_batch_size</cite> and <cite>max_batch_size</cite> parameters. |
| These min and max values for batch size are sent to the |
| <code class="xref py py-class docutils literal notranslate"><span class="pre">apache_beam.transforms.utils.BatchElements</span></code> transform.</p> |
| <p>NOTE: Elements cannot be batched when using the <cite>query_fn</cite> parameter.</p> |
| <dl class="simple"> |
| <dt>Example Usage:</dt><dd><dl class="simple"> |
| <dt>handler = BigQueryEnrichmentHandler(project=project_name,</dt><dd><p>row_restriction=”id=’{}’”, |
| table_name=’project.dataset.table’, |
| fields=fields, |
| min_batch_size=2, |
| max_batch_size=100)</p> |
| </dd> |
| </dl> |
| </dd> |
| </dl> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters<span class="colon">:</span></dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>project</strong> – Google Cloud project ID for the BigQuery table.</p></li> |
| <li><p><strong>table_name</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><em>str</em></a>) – Fully qualified BigQuery table name |
| in the format <cite>project.dataset.table</cite>.</p></li> |
| <li><p><strong>row_restriction_template</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><em>str</em></a>) – A template string for the <cite>WHERE</cite> clause |
| in the BigQuery query with placeholders (<cite>{}</cite>) to dynamically filter |
| rows based on input data.</p></li> |
| <li><p><strong>fields</strong> – (Optional[list[str]]) List of field names present in the input |
| <cite>beam.Row</cite>. These are used to construct the WHERE clause |
| (if <cite>condition_value_fn</cite> is not provided).</p></li> |
| <li><p><strong>column_names</strong> – (Optional[list[str]]) Names of columns to select from the |
| BigQuery table. If not provided, all columns (<cite>*</cite>) are selected.</p></li> |
| <li><p><strong>condition_value_fn</strong> – (Optional[Callable[[beam.Row], Any]]) A function |
| that takes a <cite>beam.Row</cite> and returns a list of value to populate in the |
| placeholder <cite>{}</cite> of <cite>WHERE</cite> clause in the query.</p></li> |
| <li><p><strong>query_fn</strong> – (Optional[Callable[[beam.Row], str]]) A function that takes a |
| <cite>beam.Row</cite> and returns a complete BigQuery SQL query string.</p></li> |
| <li><p><strong>min_batch_size</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.13)"><em>int</em></a>) – Minimum number of rows to batch together when |
| querying BigQuery. Defaults to 1 if <cite>query_fn</cite> is not specified.</p></li> |
| <li><p><strong>max_batch_size</strong> (<a class="reference external" href="https://docs.python.org/3/library/functions.html#int" title="(in Python v3.13)"><em>int</em></a>) – Maximum number of rows to batch together. |
| Defaults to 10,000 if <cite>query_fn</cite> is not specified.</p></li> |
| <li><p><strong>**kwargs</strong> – Additional keyword arguments to pass to <cite>bigquery.Client</cite>.</p></li> |
| </ul> |
| </dd> |
| </dl> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <ul class="simple"> |
| <li><p><cite>min_batch_size</cite> and <cite>max_batch_size</cite> cannot be defined if the |
| <cite>query_fn</cite> is provided.</p></li> |
| <li><p>Either <cite>fields</cite> or <cite>condition_value_fn</cite> must be provided for query |
| construction if <cite>query_fn</cite> is not provided.</p></li> |
| <li><p>Ensure appropriate permissions are granted for BigQuery access.</p></li> |
| </ul> |
| </div> |
| <dl class="py method"> |
| <dt class="sig sig-object py" id="apache_beam.transforms.enrichment_handlers.bigquery.BigQueryEnrichmentHandler.create_row_key"> |
| <span class="sig-name descname"><span class="pre">create_row_key</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">row</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="apache_beam.pvalue.html#apache_beam.pvalue.Row" title="apache_beam.pvalue.Row"><span class="pre">Row</span></a></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/enrichment_handlers/bigquery.html#BigQueryEnrichmentHandler.create_row_key"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.transforms.enrichment_handlers.bigquery.BigQueryEnrichmentHandler.create_row_key" title="Link to this definition"></a></dt> |
| <dd></dd></dl> |
| |
| <dl class="py method"> |
| <dt class="sig sig-object py" id="apache_beam.transforms.enrichment_handlers.bigquery.BigQueryEnrichmentHandler.get_cache_key"> |
| <span class="sig-name descname"><span class="pre">get_cache_key</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">request</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="apache_beam.pvalue.html#apache_beam.pvalue.Row" title="apache_beam.pvalue.Row"><span class="pre">Row</span></a><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#list" title="(in Python v3.13)"><span class="pre">list</span></a><span class="p"><span class="pre">[</span></span><a class="reference internal" href="apache_beam.pvalue.html#apache_beam.pvalue.Row" title="apache_beam.pvalue.Row"><span class="pre">Row</span></a><span class="p"><span class="pre">]</span></span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/enrichment_handlers/bigquery.html#BigQueryEnrichmentHandler.get_cache_key"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.transforms.enrichment_handlers.bigquery.BigQueryEnrichmentHandler.get_cache_key" title="Link to this definition"></a></dt> |
| <dd></dd></dl> |
| |
| <dl class="py method"> |
| <dt class="sig sig-object py" id="apache_beam.transforms.enrichment_handlers.bigquery.BigQueryEnrichmentHandler.batch_elements_kwargs"> |
| <span class="sig-name descname"><span class="pre">batch_elements_kwargs</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference external" href="https://docs.python.org/3/library/collections.abc.html#collections.abc.Mapping" title="(in Python v3.13)"><span class="pre">Mapping</span></a><span class="p"><span class="pre">[</span></span><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><span class="pre">str</span></a><span class="p"><span class="pre">,</span></span><span class="w"> </span><a class="reference external" href="https://docs.python.org/3/library/typing.html#typing.Any" title="(in Python v3.13)"><span class="pre">Any</span></a><span class="p"><span class="pre">]</span></span></span></span><a class="reference internal" href="_modules/apache_beam/transforms/enrichment_handlers/bigquery.html#BigQueryEnrichmentHandler.batch_elements_kwargs"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.transforms.enrichment_handlers.bigquery.BigQueryEnrichmentHandler.batch_elements_kwargs" title="Link to this definition"></a></dt> |
| <dd><p>Returns a kwargs suitable for <cite>beam.BatchElements</cite>.</p> |
| </dd></dl> |
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