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| <div class="subTitle">org.apache.beam.sdk.schemas.transforms</div> |
| <h2 title="Class AddFields" class="title">Class AddFields</h2> |
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| <pre><a href="../../../../../../org/apache/beam/sdk/annotations/Experimental.html" title="annotation in org.apache.beam.sdk.annotations">@Experimental</a>(<a href="../../../../../../org/apache/beam/sdk/annotations/Experimental.html#value--">value</a>=<a href="../../../../../../org/apache/beam/sdk/annotations/Experimental.Kind.html#SCHEMAS">SCHEMAS</a>) |
| public class <span class="typeNameLabel">AddFields</span> |
| extends java.lang.Object</pre> |
| <div class="block">A transform to add new nullable fields to a PCollection's schema. Elements are extended to have |
| the new schema. By default new fields are nullable, and input rows will be extended to the new |
| schema by inserting null values. However explicit default values for new fields can be set using |
| <a href="../../../../../../org/apache/beam/sdk/schemas/transforms/AddFields.Inner.html#field-java.lang.String-org.apache.beam.sdk.schemas.Schema.FieldType-java.lang.Object-"><code>AddFields.Inner.field(String, Schema.FieldType, Object)</code></a>. Nested fields can be added as well. |
| |
| <p>Example use: |
| |
| <pre><code> PCollection<Event> events = readEvents(); |
| PCollection<Row> augmentedEvents = |
| events.apply(AddFields.<Event>create() |
| .field("userId", FieldType.STRING) |
| .field("location.zipcode", FieldType.INT32) |
| .field("userDetails.isSpecialUser", "FieldType.BOOLEAN", false)); |
| </code></pre></div> |
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| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/schemas/transforms/AddFields.Inner.html" title="class in org.apache.beam.sdk.schemas.transforms">AddFields.Inner</a><<a href="../../../../../../org/apache/beam/sdk/schemas/transforms/AddFields.Inner.html" title="type parameter in AddFields.Inner">T</a>></span></code> |
| <div class="block">Inner PTransform for AddFields.</div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/schemas/transforms/AddFields.html#AddFields--">AddFields</a></span>()</code> </td> |
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| <td class="colFirst"><code>static <T> <a href="../../../../../../org/apache/beam/sdk/schemas/transforms/AddFields.Inner.html" title="class in org.apache.beam.sdk.schemas.transforms">AddFields.Inner</a><T></code></td> |
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| <pre>public AddFields()</pre> |
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