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

类 JoinOperatorSetsBase<I1,I2>

java.lang.Object

org.apache.flink.api.java.operators.join.JoinOperatorSetsBase<I1,I2>

类型参数:

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

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

直接已知子类:

JoinOperator.JoinOperatorSets

@Public
public class JoinOperatorSetsBase<I1,I2>
extends Object

Intermediate step of an Outer Join transformation.

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

嵌套类概要

嵌套类

限定符和类型	类和说明
class	JoinOperatorSetsBase.JoinOperatorSetsPredicateBase Intermediate step of a Join transformation.

字段概要

字段

限定符和类型	字段和说明
protected DataSet<I1>	input1
protected DataSet<I2>	input2
protected org.apache.flink.api.common.operators.base.JoinOperatorBase.JoinHint	joinHint
protected JoinType	joinType

构造器概要

构造器

构造器和说明
JoinOperatorSetsBase(DataSet<I1> input1, DataSet<I2> input2)
JoinOperatorSetsBase(DataSet<I1> input1, DataSet<I2> input2, org.apache.flink.api.common.operators.base.JoinOperatorBase.JoinHint hint)
JoinOperatorSetsBase(DataSet<I1> input1, DataSet<I2> input2, org.apache.flink.api.common.operators.base.JoinOperatorBase.JoinHint hint, JoinType type)

方法概要

限定符和类型	方法和说明
JoinOperatorSetsBase.JoinOperatorSetsPredicateBase	where(int... fields) Continues a Join transformation.
<K> JoinOperatorSetsBase.JoinOperatorSetsPredicateBase	where(org.apache.flink.api.java.functions.KeySelector<I1,K> keySelector) Continues a Join transformation and defines a KeySelector function for the first join DataSet.
JoinOperatorSetsBase.JoinOperatorSetsPredicateBase	where(String... fields) Continues a Join transformation.

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

input1

protected final DataSet<I1> input1

input2

protected final DataSet<I2> input2

joinHint

protected final org.apache.flink.api.common.operators.base.JoinOperatorBase.JoinHint joinHint

joinType

protected final JoinType joinType

构造器详细资料

JoinOperatorSetsBase

public JoinOperatorSetsBase(DataSet<I1> input1,
                            DataSet<I2> input2)

JoinOperatorSetsBase

public JoinOperatorSetsBase(DataSet<I1> input1,
                            DataSet<I2> input2,
                            org.apache.flink.api.common.operators.base.JoinOperatorBase.JoinHint hint)

JoinOperatorSetsBase

public JoinOperatorSetsBase(DataSet<I1> input1,
                            DataSet<I2> input2,
                            org.apache.flink.api.common.operators.base.JoinOperatorBase.JoinHint hint,
                            JoinType type)

方法详细资料

where

public JoinOperatorSetsBase.JoinOperatorSetsPredicateBase where(int... fields)

Continues a Join transformation.

Defines the Tuple fields of the first join DataSet that should be used as join keys.

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

参数:

fields - The indexes of the other Tuple fields of the first join DataSets that should be used as keys.

返回:

An incomplete Join transformation. Call JoinOperatorSetsBase.JoinOperatorSetsPredicateBase.equalTo(int...) or JoinOperatorSetsBase.JoinOperatorSetsPredicateBase.equalTo(KeySelector) to continue the Join.

另请参阅:

Tuple, DataSet

where

public JoinOperatorSetsBase.JoinOperatorSetsPredicateBase where(String... fields)

Continues a Join transformation.

Defines the fields of the first join DataSet that should be used as grouping keys. Fields are the names of member fields of the underlying type of the data set.

参数:

fields - The fields of the first join DataSets that should be used as keys.

返回:

An incomplete Join transformation. Call JoinOperatorSetsBase.JoinOperatorSetsPredicateBase.equalTo(int...) or JoinOperatorSetsBase.JoinOperatorSetsPredicateBase.equalTo(KeySelector) to continue the Join.

另请参阅:

Tuple, DataSet

where

public <K> JoinOperatorSetsBase.JoinOperatorSetsPredicateBase where(org.apache.flink.api.java.functions.KeySelector<I1,K> keySelector)

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

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

参数:

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

返回:

An incomplete Join transformation. Call JoinOperatorSetsBase.JoinOperatorSetsPredicateBase.equalTo(int...) or JoinOperatorSetsBase.JoinOperatorSetsPredicateBase.equalTo(KeySelector) to continue the Join.

另请参阅:

KeySelector, DataSet