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| <section id="module-apache_beam.io.gcp.datastore.v1new.query_splitter"> |
| <span id="apache-beam-io-gcp-datastore-v1new-query-splitter-module"></span><h1>apache_beam.io.gcp.datastore.v1new.query_splitter module<a class="headerlink" href="#module-apache_beam.io.gcp.datastore.v1new.query_splitter" title="Link to this heading"></a></h1> |
| <p>Implements a Cloud Datastore query splitter.</p> |
| <p>For internal use only. No backwards compatibility guarantees.</p> |
| <dl class="py exception"> |
| <dt class="sig sig-object py" id="apache_beam.io.gcp.datastore.v1new.query_splitter.QuerySplitterError"> |
| <em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">apache_beam.io.gcp.datastore.v1new.query_splitter.</span></span><span class="sig-name descname"><span class="pre">QuerySplitterError</span></span><a class="reference internal" href="_modules/apache_beam/io/gcp/datastore/v1new/query_splitter.html#QuerySplitterError"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.io.gcp.datastore.v1new.query_splitter.QuerySplitterError" title="Link to this definition"></a></dt> |
| <dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/exceptions.html#Exception" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">Exception</span></code></a></p> |
| <p>Top-level error type.</p> |
| </dd></dl> |
| |
| <dl class="py exception"> |
| <dt class="sig sig-object py" id="apache_beam.io.gcp.datastore.v1new.query_splitter.SplitNotPossibleError"> |
| <em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">apache_beam.io.gcp.datastore.v1new.query_splitter.</span></span><span class="sig-name descname"><span class="pre">SplitNotPossibleError</span></span><a class="reference internal" href="_modules/apache_beam/io/gcp/datastore/v1new/query_splitter.html#SplitNotPossibleError"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.io.gcp.datastore.v1new.query_splitter.SplitNotPossibleError" title="Link to this definition"></a></dt> |
| <dd><p>Bases: <a class="reference internal" href="#apache_beam.io.gcp.datastore.v1new.query_splitter.QuerySplitterError" title="apache_beam.io.gcp.datastore.v1new.query_splitter.QuerySplitterError"><code class="xref py py-class docutils literal notranslate"><span class="pre">QuerySplitterError</span></code></a></p> |
| <p>Raised when some parameter of the query does not allow splitting.</p> |
| </dd></dl> |
| |
| <dl class="py function"> |
| <dt class="sig sig-object py" id="apache_beam.io.gcp.datastore.v1new.query_splitter.get_splits"> |
| <span class="sig-prename descclassname"><span class="pre">apache_beam.io.gcp.datastore.v1new.query_splitter.</span></span><span class="sig-name descname"><span class="pre">get_splits</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">client</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">query</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">num_splits</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/gcp/datastore/v1new/query_splitter.html#get_splits"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.io.gcp.datastore.v1new.query_splitter.get_splits" title="Link to this definition"></a></dt> |
| <dd><p>Returns a list of sharded queries for the given Cloud Datastore query.</p> |
| <p>This will create up to the desired number of splits, however it may return |
| less splits if the desired number of splits is unavailable. This will happen |
| if the number of split points provided by the underlying Datastore is less |
| than the desired number, which will occur if the number of results for the |
| query is too small.</p> |
| <p>This implementation of the QuerySplitter uses the __scatter__ property to |
| gather random split points for a query.</p> |
| <p>Note: This implementation is derived from the java query splitter in |
| <a class="reference external" href="https://github.com/GoogleCloudPlatform/google-cloud-datastore/blob/master/java/datastore/src/main/java/com/google/datastore/v1/client/QuerySplitterImpl.java">https://github.com/GoogleCloudPlatform/google-cloud-datastore/blob/master/java/datastore/src/main/java/com/google/datastore/v1/client/QuerySplitterImpl.java</a></p> |
| <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>client</strong> – the datastore client.</p></li> |
| <li><p><strong>query</strong> – the query to split.</p></li> |
| <li><p><strong>num_splits</strong> – the desired number of splits.</p></li> |
| </ul> |
| </dd> |
| <dt class="field-even">Returns<span class="colon">:</span></dt> |
| <dd class="field-even"><p>A list of split queries, of a max length of <cite>num_splits</cite></p> |
| </dd> |
| <dt class="field-odd">Raises<span class="colon">:</span></dt> |
| <dd class="field-odd"><p><a class="reference internal" href="#apache_beam.io.gcp.datastore.v1new.query_splitter.QuerySplitterError" title="apache_beam.io.gcp.datastore.v1new.query_splitter.QuerySplitterError"><strong>QuerySplitterError</strong></a> – if split could not be performed owing to query or split |
| parameters.</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| </section> |
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