org.apache.beam.sdk.schemas.transforms

Class CoGroup.ExpandCrossProduct

java.lang.Object

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

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

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

Enclosing class:

CoGroup

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

A PTransform that calculates the cross-product join.

See Also:

Serialized Form

Field Summary

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

name, resourceHints

Method Summary

Modifier and Type	Method and Description
PCollection<Row>	expand(PCollectionTuple input) Override this method to specify how this PTransform should be expanded on the given InputT.
CoGroup.ExpandCrossProduct	join(java.lang.String tag, CoGroup.By clause) Select the following fields for the specified PCollection with the specified join args.

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

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

Methods inherited from class java.lang.Object

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

Method Detail

join

public CoGroup.ExpandCrossProduct join(java.lang.String tag,
                                       CoGroup.By clause)

Select the following fields for the specified PCollection with the specified join args.

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

expand

public PCollection<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<Row>>