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<div class="subTitle">org.apache.beam.sdk.io.gcp.bigquery</div>
<h2 title="Class BigQuerySchemaIOProvider" class="title">Class BigQuerySchemaIOProvider</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li>org.apache.beam.sdk.io.gcp.bigquery.BigQuerySchemaIOProvider</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html" title="interface in org.apache.beam.sdk.schemas.io">SchemaIOProvider</a></dd>
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<pre><a href="../../../../../../../org/apache/beam/sdk/annotations/Internal.html" title="annotation in org.apache.beam.sdk.annotations">@Internal</a>
<a href="../../../../../../../org/apache/beam/sdk/annotations/Experimental.html" title="annotation in org.apache.beam.sdk.annotations">@Experimental</a>
@AutoService(value=<a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html" title="interface in org.apache.beam.sdk.schemas.io">SchemaIOProvider.class</a>)
public class <span class="typeNameLabel">BigQuerySchemaIOProvider</span>
extends java.lang.Object
implements <a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html" title="interface in org.apache.beam.sdk.schemas.io">SchemaIOProvider</a></pre>
<div class="block">An implementation of <a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html" title="interface in org.apache.beam.sdk.schemas.io"><code>SchemaIOProvider</code></a> for reading and writing to BigQuery with <a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQueryIO.html" title="class in org.apache.beam.sdk.io.gcp.bigquery"><code>BigQueryIO</code></a>. For a description of configuration options and other defaults, see <a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQuerySchemaIOProvider.html#configurationSchema--"><code>configurationSchema()</code></a>.
<p>This transform is still experimental, and is still subject to breaking changes.</div>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQuerySchemaIOProvider.html#BigQuerySchemaIOProvider--">BigQuerySchemaIOProvider</a></span>()</code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code><a href="../../../../../../../org/apache/beam/sdk/schemas/Schema.html" title="class in org.apache.beam.sdk.schemas">Schema</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQuerySchemaIOProvider.html#configurationSchema--">configurationSchema</a></span>()</code>
<div class="block">Returns the expected schema of the configuration object.</div>
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<td class="colFirst"><code>org.apache.beam.sdk.io.gcp.bigquery.BigQuerySchemaIOProvider.BigQuerySchemaIO</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQuerySchemaIOProvider.html#from-java.lang.String-org.apache.beam.sdk.values.Row-org.apache.beam.sdk.schemas.Schema-">from</a></span>(java.lang.String&nbsp;location,
<a href="../../../../../../../org/apache/beam/sdk/values/Row.html" title="class in org.apache.beam.sdk.values">Row</a>&nbsp;configuration,
<a href="https://static.javadoc.io/org.checkerframework/checker-qual/3.10.0/org/checkerframework/checker/nullness/qual/Nullable.html?is-external=true" title="class or interface in org.checkerframework.checker.nullness.qual">@Nullable</a> <a href="../../../../../../../org/apache/beam/sdk/schemas/Schema.html" title="class in org.apache.beam.sdk.schemas">Schema</a>&nbsp;dataSchema)</code>
<div class="block">Produces a SchemaIO given a String representing the data's location, the schema of the data
that resides there, and some IO-specific configuration object.</div>
</td>
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<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQuerySchemaIOProvider.html#identifier--">identifier</a></span>()</code>
<div class="block">Returns an id that uniquely represents this IO.</div>
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<td class="colFirst"><code><a href="../../../../../../../org/apache/beam/sdk/values/PCollection.IsBounded.html" title="enum in org.apache.beam.sdk.values">PCollection.IsBounded</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQuerySchemaIOProvider.html#isBounded--">isBounded</a></span>()</code>
<div class="block">Indicates whether the PCollections produced by this transform will contain a bounded or
unbounded number of elements.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQuerySchemaIOProvider.html#requiresDataSchema--">requiresDataSchema</a></span>()</code>
<div class="block">Indicates whether this transform requires a specified data schema.</div>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>BigQuerySchemaIOProvider</h4>
<pre>public&nbsp;BigQuerySchemaIOProvider()</pre>
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<h4>identifier</h4>
<pre>public&nbsp;java.lang.String&nbsp;identifier()</pre>
<div class="block">Returns an id that uniquely represents this IO.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html#identifier--">identifier</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html" title="interface in org.apache.beam.sdk.schemas.io">SchemaIOProvider</a></code></dd>
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<h4>configurationSchema</h4>
<pre>public&nbsp;<a href="../../../../../../../org/apache/beam/sdk/schemas/Schema.html" title="class in org.apache.beam.sdk.schemas">Schema</a>&nbsp;configurationSchema()</pre>
<div class="block">Returns the expected schema of the configuration object. Note this is distinct from the schema
of the data source itself. The fields are as follows:
<ul>
<li>table: Nullable String - Used for reads and writes. Specifies a table to read or write
to, in the format described in <a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQueryHelpers.html#parseTableSpec-java.lang.String-"><code>BigQueryHelpers.parseTableSpec(java.lang.String)</code></a>. Used as an input
to <a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQueryIO.TypedRead.html#from-java.lang.String-"><code>BigQueryIO.TypedRead.from(String)</code></a> or <a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQueryIO.Write.html#to-java.lang.String-"><code>BigQueryIO.Write.to(String)</code></a>.
<li>query: Nullable String - Used for reads. Specifies a query to read results from using the
BigQuery Standard SQL dialect. Used as an input to <a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQueryIO.TypedRead.html#fromQuery-java.lang.String-"><code>BigQueryIO.TypedRead.fromQuery(String)</code></a>.
<li>queryLocation: Nullable String - Used for reads. Specifies a BigQuery geographic location
where the query job will be executed. Used as an input to <a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQueryIO.TypedRead.html#withQueryLocation-java.lang.String-"><code>BigQueryIO.TypedRead.withQueryLocation(String)</code></a>.
<li>createDisposition: Nullable String - Used for writes. Specifies whether a table should be
created if it does not exist. Valid inputs are "Never" and "IfNeeded", corresponding to
values of <a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQueryIO.Write.CreateDisposition.html" title="enum in org.apache.beam.sdk.io.gcp.bigquery"><code>BigQueryIO.Write.CreateDisposition</code></a>. Used as an input to <a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQueryIO.Write.html#withCreateDisposition-org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO.Write.CreateDisposition-"><code>BigQueryIO.Write.withCreateDisposition(BigQueryIO.Write.CreateDisposition)</code></a>.
</ul>
Relevant default values for these transforms that are not configurable fields are as follows:
<ul>
<li>ReadMethod - The input to <a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQueryIO.TypedRead.html#withMethod-org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO.TypedRead.Method-"><code>BigQueryIO.TypedRead.withMethod(BigQueryIO.TypedRead.Method)</code></a>. Defaults to EXPORT, since
that is the only method that currently offers Beam Schema support.
<li>WriteMethod - The input to <a href="../../../../../../../org/apache/beam/sdk/io/gcp/bigquery/BigQueryIO.Write.html#withMethod-org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO.Write.Method-"><code>BigQueryIO.Write.withMethod(BigQueryIO.Write.Method)</code></a>.
Currently defaults to STORAGE_WRITE_API.
</ul></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html#configurationSchema--">configurationSchema</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html" title="interface in org.apache.beam.sdk.schemas.io">SchemaIOProvider</a></code></dd>
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<h4>from</h4>
<pre>public&nbsp;org.apache.beam.sdk.io.gcp.bigquery.BigQuerySchemaIOProvider.BigQuerySchemaIO&nbsp;from(java.lang.String&nbsp;location,
<a href="../../../../../../../org/apache/beam/sdk/values/Row.html" title="class in org.apache.beam.sdk.values">Row</a>&nbsp;configuration,
<a href="https://static.javadoc.io/org.checkerframework/checker-qual/3.10.0/org/checkerframework/checker/nullness/qual/Nullable.html?is-external=true" title="class or interface in org.checkerframework.checker.nullness.qual">@Nullable</a> <a href="../../../../../../../org/apache/beam/sdk/schemas/Schema.html" title="class in org.apache.beam.sdk.schemas">Schema</a>&nbsp;dataSchema)</pre>
<div class="block">Produces a SchemaIO given a String representing the data's location, the schema of the data
that resides there, and some IO-specific configuration object.
<p>For BigQuery IO, only the configuration object is used. Location and data schema have no
effect. Specifying a table and dataset is done through appropriate fields in the configuration
object, and the data schema is automatically generated from either the input PCollection or
schema of the BigQuery table.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html#from-java.lang.String-org.apache.beam.sdk.values.Row-org.apache.beam.sdk.schemas.Schema-">from</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html" title="interface in org.apache.beam.sdk.schemas.io">SchemaIOProvider</a></code></dd>
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<h4>requiresDataSchema</h4>
<pre>public&nbsp;boolean&nbsp;requiresDataSchema()</pre>
<div class="block">Indicates whether this transform requires a specified data schema.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html#requiresDataSchema--">requiresDataSchema</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html" title="interface in org.apache.beam.sdk.schemas.io">SchemaIOProvider</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>false</dd>
</dl>
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<h4>isBounded</h4>
<pre>public&nbsp;<a href="../../../../../../../org/apache/beam/sdk/values/PCollection.IsBounded.html" title="enum in org.apache.beam.sdk.values">PCollection.IsBounded</a>&nbsp;isBounded()</pre>
<div class="block">Indicates whether the PCollections produced by this transform will contain a bounded or
unbounded number of elements.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html#isBounded--">isBounded</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/beam/sdk/schemas/io/SchemaIOProvider.html" title="interface in org.apache.beam.sdk.schemas.io">SchemaIOProvider</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Bounded</dd>
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