org.apache.beam.sdk.extensions.sql.impl.transform

Class BeamJoinTransforms.ExtractJoinFields

java.lang.Object

org.apache.beam.sdk.transforms.InferableFunction<InputT,OutputT>

org.apache.beam.sdk.transforms.SimpleFunction<Row,KV<Row,Row>>

org.apache.beam.sdk.extensions.sql.impl.transform.BeamJoinTransforms.ExtractJoinFields

All Implemented Interfaces:

java.io.Serializable, HasDisplayData, ProcessFunction<Row,KV<Row,Row>>, SerializableFunction<Row,KV<Row,Row>>

Enclosing class:

BeamJoinTransforms

public static class BeamJoinTransforms.ExtractJoinFields
extends SimpleFunction<Row,KV<Row,Row>>

A SimpleFunction to extract join fields from the specified row.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ExtractJoinFields(boolean isLeft, java.util.List<org.apache.calcite.util.Pair<org.apache.calcite.rex.RexNode,org.apache.calcite.rex.RexNode>> joinColumns, Schema schema, int leftRowColumnCount)

Method Summary

Modifier and Type	Method and Description
KV<Row,Row>	apply(Row input) Returns the result of invoking this function on the given input.

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

fromSerializableFunctionWithOutputType

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

fromProcessFunctionWithOutputType, getInputTypeDescriptor, getOutputTypeDescriptor, populateDisplayData

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtractJoinFields

public ExtractJoinFields(boolean isLeft,
                         java.util.List<org.apache.calcite.util.Pair<org.apache.calcite.rex.RexNode,org.apache.calcite.rex.RexNode>> joinColumns,
                         Schema schema,
                         int leftRowColumnCount)

Method Detail

apply

public KV<Row,Row> apply(Row input)

Description copied from interface: ProcessFunction

Returns the result of invoking this function on the given input.

Specified by:

apply in interface ProcessFunction<Row,KV<Row,Row>>

Specified by:

apply in interface SerializableFunction<Row,KV<Row,Row>>

Overrides:

apply in class SimpleFunction<Row,KV<Row,Row>>