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<div class="section" id="structured-streaming">
<h1>Structured Streaming<a class="headerlink" href="#structured-streaming" title="Permalink to this headline"></a></h1>
<div class="section" id="core-classes">
<h2>Core Classes<a class="headerlink" href="#core-classes" title="Permalink to this headline"></a></h2>
<table class="longtable table autosummary">
<colgroup>
<col style="width: 10%" />
<col style="width: 90%" />
</colgroup>
<tbody>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamReader.html#pyspark.sql.streaming.DataStreamReader" title="pyspark.sql.streaming.DataStreamReader"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamReader</span></code></a>(spark)</p></td>
<td><p>Interface used to load a streaming <a class="reference internal" href="api/pyspark.sql.DataFrame.html#pyspark.sql.DataFrame" title="pyspark.sql.DataFrame"><code class="xref py py-class docutils literal notranslate"><span class="pre">DataFrame</span></code></a> from external storage systems (e.g.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamWriter.html#pyspark.sql.streaming.DataStreamWriter" title="pyspark.sql.streaming.DataStreamWriter"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamWriter</span></code></a>(df)</p></td>
<td><p>Interface used to write a streaming <a class="reference internal" href="api/pyspark.sql.DataFrame.html#pyspark.sql.DataFrame" title="pyspark.sql.DataFrame"><code class="xref py py-class docutils literal notranslate"><span class="pre">DataFrame</span></code></a> to external storage systems (e.g.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.ForeachBatchFunction.html#pyspark.sql.streaming.ForeachBatchFunction" title="pyspark.sql.streaming.ForeachBatchFunction"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ForeachBatchFunction</span></code></a>(sql_ctx, func)</p></td>
<td><p>This is the Python implementation of Java interface ‘ForeachBatchFunction’.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.html#pyspark.sql.streaming.StreamingQuery" title="pyspark.sql.streaming.StreamingQuery"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery</span></code></a>(jsq)</p></td>
<td><p>A handle to a query that is executing continuously in the background as new data arrives.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQueryException.html#pyspark.sql.streaming.StreamingQueryException" title="pyspark.sql.streaming.StreamingQueryException"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQueryException</span></code></a>(desc, stackTrace[, …])</p></td>
<td><p>Exception that stopped a <a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.html#pyspark.sql.streaming.StreamingQuery" title="pyspark.sql.streaming.StreamingQuery"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamingQuery</span></code></a>.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQueryManager.html#pyspark.sql.streaming.StreamingQueryManager" title="pyspark.sql.streaming.StreamingQueryManager"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQueryManager</span></code></a>(jsqm)</p></td>
<td><p>A class to manage all the <a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.html#pyspark.sql.streaming.StreamingQuery" title="pyspark.sql.streaming.StreamingQuery"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamingQuery</span></code></a> StreamingQueries active.</p></td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="input-and-output">
<h2>Input and Output<a class="headerlink" href="#input-and-output" title="Permalink to this headline"></a></h2>
<table class="longtable table autosummary">
<colgroup>
<col style="width: 10%" />
<col style="width: 90%" />
</colgroup>
<tbody>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamReader.csv.html#pyspark.sql.streaming.DataStreamReader.csv" title="pyspark.sql.streaming.DataStreamReader.csv"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamReader.csv</span></code></a>(path[, schema, sep, …])</p></td>
<td><p>Loads a CSV file stream and returns the result as a <code class="xref py py-class docutils literal notranslate"><span class="pre">DataFrame</span></code>.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamReader.format.html#pyspark.sql.streaming.DataStreamReader.format" title="pyspark.sql.streaming.DataStreamReader.format"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamReader.format</span></code></a>(source)</p></td>
<td><p>Specifies the input data source format.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamReader.json.html#pyspark.sql.streaming.DataStreamReader.json" title="pyspark.sql.streaming.DataStreamReader.json"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamReader.json</span></code></a>(path[, schema, …])</p></td>
<td><p>Loads a JSON file stream and returns the results as a <code class="xref py py-class docutils literal notranslate"><span class="pre">DataFrame</span></code>.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamReader.load.html#pyspark.sql.streaming.DataStreamReader.load" title="pyspark.sql.streaming.DataStreamReader.load"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamReader.load</span></code></a>([path, format, schema])</p></td>
<td><p>Loads a data stream from a data source and returns it as a <a class="reference internal" href="api/pyspark.sql.DataFrame.html#pyspark.sql.DataFrame" title="pyspark.sql.DataFrame"><code class="xref py py-class docutils literal notranslate"><span class="pre">DataFrame</span></code></a>.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamReader.option.html#pyspark.sql.streaming.DataStreamReader.option" title="pyspark.sql.streaming.DataStreamReader.option"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamReader.option</span></code></a>(key, value)</p></td>
<td><p>Adds an input option for the underlying data source.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamReader.options.html#pyspark.sql.streaming.DataStreamReader.options" title="pyspark.sql.streaming.DataStreamReader.options"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamReader.options</span></code></a>(**options)</p></td>
<td><p>Adds input options for the underlying data source.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamReader.orc.html#pyspark.sql.streaming.DataStreamReader.orc" title="pyspark.sql.streaming.DataStreamReader.orc"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamReader.orc</span></code></a>(path[, mergeSchema, …])</p></td>
<td><p>Loads a ORC file stream, returning the result as a <code class="xref py py-class docutils literal notranslate"><span class="pre">DataFrame</span></code>.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamReader.parquet.html#pyspark.sql.streaming.DataStreamReader.parquet" title="pyspark.sql.streaming.DataStreamReader.parquet"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamReader.parquet</span></code></a>(path[, …])</p></td>
<td><p>Loads a Parquet file stream, returning the result as a <code class="xref py py-class docutils literal notranslate"><span class="pre">DataFrame</span></code>.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamReader.schema.html#pyspark.sql.streaming.DataStreamReader.schema" title="pyspark.sql.streaming.DataStreamReader.schema"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamReader.schema</span></code></a>(schema)</p></td>
<td><p>Specifies the input schema.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamReader.table.html#pyspark.sql.streaming.DataStreamReader.table" title="pyspark.sql.streaming.DataStreamReader.table"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamReader.table</span></code></a>(tableName)</p></td>
<td><p>Define a Streaming DataFrame on a Table.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamReader.text.html#pyspark.sql.streaming.DataStreamReader.text" title="pyspark.sql.streaming.DataStreamReader.text"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamReader.text</span></code></a>(path[, wholetext, …])</p></td>
<td><p>Loads a text file stream and returns a <code class="xref py py-class docutils literal notranslate"><span class="pre">DataFrame</span></code> whose schema starts with a string column named “value”, and followed by partitioned columns if there are any.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamWriter.foreach.html#pyspark.sql.streaming.DataStreamWriter.foreach" title="pyspark.sql.streaming.DataStreamWriter.foreach"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamWriter.foreach</span></code></a>(f)</p></td>
<td><p>Sets the output of the streaming query to be processed using the provided writer <code class="docutils literal notranslate"><span class="pre">f</span></code>.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamWriter.foreachBatch.html#pyspark.sql.streaming.DataStreamWriter.foreachBatch" title="pyspark.sql.streaming.DataStreamWriter.foreachBatch"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamWriter.foreachBatch</span></code></a>(func)</p></td>
<td><p>Sets the output of the streaming query to be processed using the provided function.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamWriter.format.html#pyspark.sql.streaming.DataStreamWriter.format" title="pyspark.sql.streaming.DataStreamWriter.format"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamWriter.format</span></code></a>(source)</p></td>
<td><p>Specifies the underlying output data source.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamWriter.option.html#pyspark.sql.streaming.DataStreamWriter.option" title="pyspark.sql.streaming.DataStreamWriter.option"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamWriter.option</span></code></a>(key, value)</p></td>
<td><p>Adds an output option for the underlying data source.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamWriter.options.html#pyspark.sql.streaming.DataStreamWriter.options" title="pyspark.sql.streaming.DataStreamWriter.options"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamWriter.options</span></code></a>(**options)</p></td>
<td><p>Adds output options for the underlying data source.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamWriter.outputMode.html#pyspark.sql.streaming.DataStreamWriter.outputMode" title="pyspark.sql.streaming.DataStreamWriter.outputMode"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamWriter.outputMode</span></code></a>(outputMode)</p></td>
<td><p>Specifies how data of a streaming DataFrame/Dataset is written to a streaming sink.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamWriter.partitionBy.html#pyspark.sql.streaming.DataStreamWriter.partitionBy" title="pyspark.sql.streaming.DataStreamWriter.partitionBy"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamWriter.partitionBy</span></code></a>(*cols)</p></td>
<td><p>Partitions the output by the given columns on the file system.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamWriter.queryName.html#pyspark.sql.streaming.DataStreamWriter.queryName" title="pyspark.sql.streaming.DataStreamWriter.queryName"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamWriter.queryName</span></code></a>(queryName)</p></td>
<td><p>Specifies the name of the <a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.html#pyspark.sql.streaming.StreamingQuery" title="pyspark.sql.streaming.StreamingQuery"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamingQuery</span></code></a> that can be started with <code class="xref py py-func docutils literal notranslate"><span class="pre">start()</span></code>.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamWriter.start.html#pyspark.sql.streaming.DataStreamWriter.start" title="pyspark.sql.streaming.DataStreamWriter.start"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamWriter.start</span></code></a>([path, format, …])</p></td>
<td><p>Streams the contents of the <code class="xref py py-class docutils literal notranslate"><span class="pre">DataFrame</span></code> to a data source.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamWriter.toTable.html#pyspark.sql.streaming.DataStreamWriter.toTable" title="pyspark.sql.streaming.DataStreamWriter.toTable"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamWriter.toTable</span></code></a>(tableName[, …])</p></td>
<td><p>Starts the execution of the streaming query, which will continually output results to the given table as new data arrives.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.DataStreamWriter.trigger.html#pyspark.sql.streaming.DataStreamWriter.trigger" title="pyspark.sql.streaming.DataStreamWriter.trigger"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DataStreamWriter.trigger</span></code></a>(*[, …])</p></td>
<td><p>Set the trigger for the stream query.</p></td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="query-management">
<h2>Query Management<a class="headerlink" href="#query-management" title="Permalink to this headline"></a></h2>
<table class="longtable table autosummary">
<colgroup>
<col style="width: 10%" />
<col style="width: 90%" />
</colgroup>
<tbody>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.awaitTermination.html#pyspark.sql.streaming.StreamingQuery.awaitTermination" title="pyspark.sql.streaming.StreamingQuery.awaitTermination"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery.awaitTermination</span></code></a>([timeout])</p></td>
<td><p>Waits for the termination of <cite>this</cite> query, either by <code class="xref py py-func docutils literal notranslate"><span class="pre">query.stop()</span></code> or by an exception.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.exception.html#pyspark.sql.streaming.StreamingQuery.exception" title="pyspark.sql.streaming.StreamingQuery.exception"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery.exception</span></code></a>()</p></td>
<td><p><div class="versionadded">
<p><span class="versionmodified added">New in version 2.1.0.</span></p>
</div>
</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.explain.html#pyspark.sql.streaming.StreamingQuery.explain" title="pyspark.sql.streaming.StreamingQuery.explain"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery.explain</span></code></a>([extended])</p></td>
<td><p>Prints the (logical and physical) plans to the console for debugging purpose.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.id.html#pyspark.sql.streaming.StreamingQuery.id" title="pyspark.sql.streaming.StreamingQuery.id"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery.id</span></code></a></p></td>
<td><p>Returns the unique id of this query that persists across restarts from checkpoint data.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.isActive.html#pyspark.sql.streaming.StreamingQuery.isActive" title="pyspark.sql.streaming.StreamingQuery.isActive"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery.isActive</span></code></a></p></td>
<td><p>Whether this streaming query is currently active or not.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.lastProgress.html#pyspark.sql.streaming.StreamingQuery.lastProgress" title="pyspark.sql.streaming.StreamingQuery.lastProgress"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery.lastProgress</span></code></a></p></td>
<td><p>Returns the most recent <code class="xref py py-class docutils literal notranslate"><span class="pre">StreamingQueryProgress</span></code> update of this streaming query or None if there were no progress updates</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.name.html#pyspark.sql.streaming.StreamingQuery.name" title="pyspark.sql.streaming.StreamingQuery.name"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery.name</span></code></a></p></td>
<td><p>Returns the user-specified name of the query, or null if not specified.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.processAllAvailable.html#pyspark.sql.streaming.StreamingQuery.processAllAvailable" title="pyspark.sql.streaming.StreamingQuery.processAllAvailable"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery.processAllAvailable</span></code></a>()</p></td>
<td><p>Blocks until all available data in the source has been processed and committed to the sink.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.recentProgress.html#pyspark.sql.streaming.StreamingQuery.recentProgress" title="pyspark.sql.streaming.StreamingQuery.recentProgress"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery.recentProgress</span></code></a></p></td>
<td><p>Returns an array of the most recent [[StreamingQueryProgress]] updates for this query.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.runId.html#pyspark.sql.streaming.StreamingQuery.runId" title="pyspark.sql.streaming.StreamingQuery.runId"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery.runId</span></code></a></p></td>
<td><p>Returns the unique id of this query that does not persist across restarts.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.status.html#pyspark.sql.streaming.StreamingQuery.status" title="pyspark.sql.streaming.StreamingQuery.status"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery.status</span></code></a></p></td>
<td><p>Returns the current status of the query.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQuery.stop.html#pyspark.sql.streaming.StreamingQuery.stop" title="pyspark.sql.streaming.StreamingQuery.stop"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQuery.stop</span></code></a>()</p></td>
<td><p>Stop this streaming query.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQueryManager.active.html#pyspark.sql.streaming.StreamingQueryManager.active" title="pyspark.sql.streaming.StreamingQueryManager.active"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQueryManager.active</span></code></a></p></td>
<td><p>Returns a list of active queries associated with this SQLContext</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQueryManager.awaitAnyTermination.html#pyspark.sql.streaming.StreamingQueryManager.awaitAnyTermination" title="pyspark.sql.streaming.StreamingQueryManager.awaitAnyTermination"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQueryManager.awaitAnyTermination</span></code></a>([…])</p></td>
<td><p>Wait until any of the queries on the associated SQLContext has terminated since the creation of the context, or since <code class="xref py py-func docutils literal notranslate"><span class="pre">resetTerminated()</span></code> was called.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQueryManager.get.html#pyspark.sql.streaming.StreamingQueryManager.get" title="pyspark.sql.streaming.StreamingQueryManager.get"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQueryManager.get</span></code></a>(id)</p></td>
<td><p>Returns an active query from this SQLContext or throws exception if an active query with this name doesn’t exist.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="api/pyspark.sql.streaming.StreamingQueryManager.resetTerminated.html#pyspark.sql.streaming.StreamingQueryManager.resetTerminated" title="pyspark.sql.streaming.StreamingQueryManager.resetTerminated"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StreamingQueryManager.resetTerminated</span></code></a>()</p></td>
<td><p>Forget about past terminated queries so that <code class="xref py py-func docutils literal notranslate"><span class="pre">awaitAnyTermination()</span></code> can be used again to wait for new terminations.</p></td>
</tr>
</tbody>
</table>
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