org.apache.beam.sdk.schemas.transforms

Class CoGroup.Inner

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<PCollectionTuple,PCollection<KV<Row,Row>>>

org.apache.beam.sdk.schemas.transforms.CoGroup.Inner

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

Enclosing class:

CoGroup

public static class CoGroup.Inner
extends PTransform<PCollectionTuple,PCollection<KV<Row,Row>>>

The implementing PTransform.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.beam.sdk.transforms.PTransform

name

Method Summary

Modifier and Type	Method and Description
CoGroup.Inner	byFieldAccessDescriptor(TupleTag<?> tag, FieldAccessDescriptor fieldAccessDescriptor) Select the following fields for the specified PCollection using FieldAccessDescriptor.
CoGroup.Inner	byFieldIds(TupleTag<?> tag, java.lang.Integer... fieldIds) Select the following field ids for the specified PCollection.
CoGroup.Inner	byFieldNames(TupleTag<?> tag, java.lang.String... fieldNames) Join by the following field names.
PCollection<KV<Row,Row>>	expand(PCollectionTuple input) Override this method to specify how this PTransform should be expanded on the given InputT.

Methods inherited from class org.apache.beam.sdk.transforms.PTransform

compose, compose, getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, populateDisplayData, toString, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

byFieldNames

public CoGroup.Inner byFieldNames(TupleTag<?> tag,
                                  java.lang.String... fieldNames)

Join by the following field names.

The same field names are used in all input PCollections.

byFieldIds

public CoGroup.Inner byFieldIds(TupleTag<?> tag,
                                java.lang.Integer... fieldIds)

Select the following field ids for the specified PCollection.

Each PCollection in the input must have fields specified for the join key.

byFieldAccessDescriptor

public CoGroup.Inner byFieldAccessDescriptor(TupleTag<?> tag,
                                             FieldAccessDescriptor fieldAccessDescriptor)

Select the following fields for the specified PCollection using FieldAccessDescriptor.

Each PCollection in the input must have fields specified for the join key.

expand

public PCollection<KV<Row,Row>> expand(PCollectionTuple input)

Description copied from class: PTransform

Override this method to specify how this PTransform should be expanded on the given InputT.

NOTE: This method should not be called directly. Instead apply the PTransform should be applied to the InputT using the apply method.

Composite transforms, which are defined in terms of other transforms, should return the output of one of the composed transforms. Non-composite transforms, which do not apply any transforms internally, should return a new unbound output and register evaluators (via backend-specific registration methods).

Specified by:

expand in class PTransform<PCollectionTuple,PCollection<KV<Row,Row>>>