Package org.apache.beam.sdk.schemas.transforms

Class Join.Impl<LhsT,RhsT>

java.lang.Object

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

org.apache.beam.sdk.schemas.transforms.Join.Impl<LhsT,RhsT>

All Implemented Interfaces:

Serializable, HasDisplayData

Enclosing class:

Join

public static class Join.Impl<LhsT,RhsT>
extends PTransform<PCollection<LhsT>,PCollection<Row>>

Implementation class .

See Also:

• Serialized Form

Field Summary

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

annotations, displayData, name, resourceHints

Method Summary

Modifier and Type	Method	Description
PCollection<Row>	expand(PCollection lhs)	Override this method to specify how this PTransform should be expanded on the given InputT.
Join.Impl<LhsT,RhsT>	on(Join.FieldsEqual.Impl predicate)	Join the PCollections using the provided predicate.
Join.Impl<LhsT,RhsT>	using(Integer... fieldIds)	Perform a natural join between the PCollections.
Join.Impl<LhsT,RhsT>	using(String... fieldNames)	Perform a natural join between the PCollections.
Join.Impl<LhsT,RhsT>	using(FieldAccessDescriptor fieldAccessDescriptor)	Perform a natural join between the PCollections.

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

addAnnotation, compose, compose, getAdditionalInputs, getAnnotations, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setDisplayData, setResourceHints, toString, validate, validate

Methods inherited from class java.lang.Object

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

Method Details

using

public Join.Impl<LhsT,RhsT> using(String... fieldNames)

Perform a natural join between the PCollections. The fields are expected to exist in both PCollections

using

public Join.Impl<LhsT,RhsT> using(Integer... fieldIds)

Perform a natural join between the PCollections. The fields are expected to exist in both PCollections

using

public Join.Impl<LhsT,RhsT> using(FieldAccessDescriptor fieldAccessDescriptor)

Perform a natural join between the PCollections. The fields are expected to exist in both PCollections

on

public Join.Impl<LhsT,RhsT> on(Join.FieldsEqual.Impl predicate)

Join the PCollections using the provided predicate.

expand

public PCollection<Row> expand(PCollection lhs)

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<PCollection<LhsT>,PCollection<Row>>