org.apache.flink.api.java.operators

Class JoinOperator.DefaultJoin<I1,I2>

java.lang.Object

org.apache.flink.api.java.DataSet<OUT>

org.apache.flink.api.java.operators.Operator<OUT,O>

org.apache.flink.api.java.operators.TwoInputOperator<IN1,IN2,OUT,O>

org.apache.flink.api.java.operators.TwoInputUdfOperator<I1,I2,OUT,JoinOperator<I1,I2,OUT>>

org.apache.flink.api.java.operators.JoinOperator<I1,I2,OUT>

org.apache.flink.api.java.operators.JoinOperator.EquiJoin<I1,I2,Tuple2<I1,I2>>

org.apache.flink.api.java.operators.JoinOperator.DefaultJoin<I1,I2>

Type Parameters:

I1 - The type of the first input DataSet of the Join transformation.

I2 - The type of the second input DataSet of the Join transformation.

All Implemented Interfaces:

UdfOperator<JoinOperator<I1,I2,Tuple2<I1,I2>>>

Enclosing class:

JoinOperator<I1,I2,OUT>

public static final class JoinOperator.DefaultJoin<I1,I2>
extends JoinOperator.EquiJoin<I1,I2,Tuple2<I1,I2>>

A Join transformation that wraps pairs of joining elements into Tuple2.
It also represents the DataSet that is the result of a Join transformation.

See Also:

Tuple2, DataSet

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.api.java.operators.JoinOperator

JoinOperator.DefaultFlatJoinFunction<T1,T2>, JoinOperator.DefaultJoin<I1,I2>, JoinOperator.EquiJoin<I1,I2,OUT>, JoinOperator.JoinHint, JoinOperator.JoinOperatorSets<I1,I2>, JoinOperator.JoinProjection<I1,I2>, JoinOperator.LeftSemiFlatJoinFunction<T1,T2>, JoinOperator.ProjectFlatJoinFunction<T1,T2,R extends Tuple>, JoinOperator.ProjectJoin<I1,I2,OUT extends Tuple>, JoinOperator.RightSemiFlatJoinFunction<T1,T2>

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	JoinOperator.DefaultJoin(DataSet<I1> input1, DataSet<I2> input2, Keys<I1> keys1, Keys<I2> keys2, JoinOperator.JoinHint hint)

Method Summary

Methods

Modifier and Type	Method and Description
JoinOperator.JoinProjection<I1,I2>	projectFirst(int... firstFieldIndexes) Initiates a ProjectJoin transformation and projects the first join input If the first join input is a Tuple DataSet, fields can be selected by their index.
JoinOperator.JoinProjection<I1,I2>	projectSecond(int... secondFieldIndexes) Initiates a ProjectJoin transformation and projects the second join input If the second join input is a Tuple DataSet, fields can be selected by their index.
<R> JoinOperator.EquiJoin<I1,I2,R>	with(FlatJoinFunction<I1,I2,R> function) Finalizes a Join transformation by applying a RichFlatJoinFunction to each pair of joined elements. Each JoinFunction call returns exactly one element.
<R> JoinOperator.EquiJoin<I1,I2,R>	with(JoinFunction<I1,I2,R> function)

Methods inherited from class org.apache.flink.api.java.operators.JoinOperator.EquiJoin

generateProjectionProperties, translateToDataFlow

Methods inherited from class org.apache.flink.api.java.operators.JoinOperator

getJoinHint, getKeys1, getKeys2

Methods inherited from class org.apache.flink.api.java.operators.TwoInputUdfOperator

extractSemanticAnnotationsFromUdf, getBroadcastSets, getParameters, getSematicProperties, setSemanticProperties, withBroadcastSet, withConstantSetFirst, withConstantSetSecond, withParameters

Methods inherited from class org.apache.flink.api.java.operators.TwoInputOperator

getInput1, getInput1Type, getInput2, getInput2Type

Methods inherited from class org.apache.flink.api.java.operators.Operator

getName, getParallelism, getResultType, name, setParallelism

Methods inherited from class org.apache.flink.api.java.DataSet

aggregate, checkSameExecutionContext, coGroup, cross, crossWithHuge, crossWithTiny, distinct, distinct, distinct, filter, flatMap, getExecutionEnvironment, getType, groupBy, groupBy, iterate, iterateDelta, join, joinWithHuge, joinWithTiny, map, max, min, output, print, printToErr, project, reduce, reduceGroup, runOperation, sum, union, write, write, writeAsCsv, writeAsCsv, writeAsCsv, writeAsText, writeAsText

Methods inherited from class java.lang.Object

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

Constructor Detail

JoinOperator.DefaultJoin

protected JoinOperator.DefaultJoin(DataSet<I1> input1,
                        DataSet<I2> input2,
                        Keys<I1> keys1,
                        Keys<I2> keys2,
                        JoinOperator.JoinHint hint)

Method Detail

with

public <R> JoinOperator.EquiJoin<I1,I2,R> with(FlatJoinFunction<I1,I2,R> function)

Finalizes a Join transformation by applying a RichFlatJoinFunction to each pair of joined elements.
Each JoinFunction call returns exactly one element.

Parameters:

function - The JoinFunction that is called for each pair of joined elements.

Returns:

An EquiJoin that represents the joined result DataSet

See Also:

RichFlatJoinFunction, JoinOperator.EquiJoin, DataSet

with

public <R> JoinOperator.EquiJoin<I1,I2,R> with(JoinFunction<I1,I2,R> function)

projectFirst

public JoinOperator.JoinProjection<I1,I2> projectFirst(int... firstFieldIndexes)

Initiates a ProjectJoin transformation and projects the first join input
If the first join input is a Tuple DataSet, fields can be selected by their index. If the first join input is not a Tuple DataSet, no parameters should be passed.
Fields of the first and second input can be added by chaining the method calls of JoinOperator.JoinProjection.projectFirst(int...) and JoinOperator.JoinProjection.projectSecond(int...).

Parameters:

firstFieldIndexes - If the first input is a Tuple DataSet, the indexes of the selected fields. For a non-Tuple DataSet, do not provide parameters. The order of fields in the output tuple is defined by to the order of field indexes.

Returns:

A JoinProjection that needs to be converted into a JoinOperator.ProjectJoin to complete the Join transformation by calling the corresponding types() function.

See Also:

Tuple, DataSet, JoinOperator.JoinProjection, JoinOperator.ProjectJoin

projectSecond

public JoinOperator.JoinProjection<I1,I2> projectSecond(int... secondFieldIndexes)

Initiates a ProjectJoin transformation and projects the second join input
If the second join input is a Tuple DataSet, fields can be selected by their index. If the second join input is not a Tuple DataSet, no parameters should be passed.
Fields of the first and second input can be added by chaining the method calls of JoinOperator.JoinProjection.projectFirst(int...) and JoinOperator.JoinProjection.projectSecond(int...).

Parameters:

secondFieldIndexes - If the second input is a Tuple DataSet, the indexes of the selected fields. For a non-Tuple DataSet, do not provide parameters. The order of fields in the output tuple is defined by to the order of field indexes.

Returns:

A JoinProjection that needs to be converted into a JoinOperator.ProjectJoin to complete the Join transformation by calling the corresponding types() function.

See Also:

Tuple, DataSet, JoinOperator.JoinProjection, JoinOperator.ProjectJoin