org.apache.flink.api.java.operators.join

类 JoinOperatorSetsBase.JoinOperatorSetsPredicateBase

java.lang.Object

org.apache.flink.api.java.operators.join.JoinOperatorSetsBase.JoinOperatorSetsPredicateBase

直接已知子类:

JoinOperator.JoinOperatorSets.JoinOperatorSetsPredicate

封闭类:

JoinOperatorSetsBase<I1,I2>

public class JoinOperatorSetsBase.JoinOperatorSetsPredicateBase
extends Object

Intermediate step of a Join transformation.

To continue the Join transformation, select the join key of the second input DataSet by calling equalTo(int...) or equalTo(KeySelector).

字段概要

字段

限定符和类型	字段和说明
protected org.apache.flink.api.common.operators.Keys<I1>	keys1

构造器概要

构造器

限定符	构造器和说明
protected	JoinOperatorSetsPredicateBase(org.apache.flink.api.common.operators.Keys<I1> keys1)

方法概要

限定符和类型	方法和说明
protected JoinOperator.DefaultJoin<I1,I2>	createDefaultJoin(org.apache.flink.api.common.operators.Keys<I2> keys2)
protected JoinFunctionAssigner<I1,I2>	createJoinFunctionAssigner(org.apache.flink.api.common.operators.Keys<I2> keys2)
JoinFunctionAssigner<I1,I2>	equalTo(int... fields) Continues a Join transformation and defines the Tuple fields of the second join DataSet that should be used as join keys.
<K> JoinFunctionAssigner<I1,I2>	equalTo(org.apache.flink.api.java.functions.KeySelector<I2,K> keySelector) Continues a Join transformation and defines a KeySelector function for the second join DataSet.
JoinFunctionAssigner<I1,I2>	equalTo(String... fields) Continues a Join transformation and defines the fields of the second join DataSet that should be used as join keys.

从类继承的方法 java.lang.Object

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

字段详细资料

keys1

protected final org.apache.flink.api.common.operators.Keys<I1> keys1

构造器详细资料

JoinOperatorSetsPredicateBase

protected JoinOperatorSetsPredicateBase(org.apache.flink.api.common.operators.Keys<I1> keys1)

方法详细资料

equalTo

public JoinFunctionAssigner<I1,I2> equalTo(int... fields)

Continues a Join transformation and defines the Tuple fields of the second join DataSet that should be used as join keys.

Note: Fields can only be selected as join keys on Tuple DataSets.

The resulting JoinFunctionAssigner needs to be finished by providing a JoinFunction by calling JoinFunctionAssigner.with(JoinFunction)

参数:

fields - The indexes of the Tuple fields of the second join DataSet that should be used as keys.

返回:

A JoinFunctionAssigner.

equalTo

public JoinFunctionAssigner<I1,I2> equalTo(String... fields)

Continues a Join transformation and defines the fields of the second join DataSet that should be used as join keys.

The resulting JoinFunctionAssigner needs to be finished by providing a JoinFunction by calling JoinFunctionAssigner.with(JoinFunction)

参数:

fields - The fields of the second join DataSet that should be used as keys.

返回:

A JoinFunctionAssigner.

equalTo

public <K> JoinFunctionAssigner<I1,I2> equalTo(org.apache.flink.api.java.functions.KeySelector<I2,K> keySelector)

Continues a Join transformation and defines a KeySelector function for the second join DataSet.

The KeySelector function is called for each element of the second DataSet and extracts a single key value on which the DataSet is joined.

The resulting JoinFunctionAssigner needs to be finished by providing a JoinFunction by calling JoinFunctionAssigner.with(JoinFunction)

参数:

keySelector - The KeySelector function which extracts the key values from the second DataSet on which it is joined.

返回:

A JoinFunctionAssigner.

createJoinFunctionAssigner

protected JoinFunctionAssigner<I1,I2> createJoinFunctionAssigner(org.apache.flink.api.common.operators.Keys<I2> keys2)

createDefaultJoin

protected JoinOperator.DefaultJoin<I1,I2> createDefaultJoin(org.apache.flink.api.common.operators.Keys<I2> keys2)