org.apache.flink.runtime.operators.sort

类 AbstractMergeInnerJoinIterator<T1,T2,O>

java.lang.Object

org.apache.flink.runtime.operators.sort.AbstractMergeIterator<T1,T2,O>

org.apache.flink.runtime.operators.sort.AbstractMergeInnerJoinIterator<T1,T2,O>

所有已实现的接口:

JoinTaskIterator<T1,T2,O>

直接已知子类:

NonReusingMergeInnerJoinIterator, ReusingMergeInnerJoinIterator

public abstract class AbstractMergeInnerJoinIterator<T1,T2,O>
extends AbstractMergeIterator<T1,T2,O>

An implementation of the JoinTaskIterator that realizes the joining through a sort-merge join strategy.

字段概要

从类继承的字段 org.apache.flink.runtime.operators.sort.AbstractMergeIterator

blockHeadCopy, copy1, copy2, iterator1, iterator2, pairComparator, serializer1, serializer2, spillHeadCopy

构造器概要

构造器

构造器和说明

AbstractMergeInnerJoinIterator(org.apache.flink.util.MutableObjectIterator<T1> input1, org.apache.flink.util.MutableObjectIterator<T2> input2, org.apache.flink.api.common.typeutils.TypeSerializer<T1> serializer1, org.apache.flink.api.common.typeutils.TypeComparator<T1> comparator1, org.apache.flink.api.common.typeutils.TypeSerializer<T2> serializer2, org.apache.flink.api.common.typeutils.TypeComparator<T2> comparator2, org.apache.flink.api.common.typeutils.TypePairComparator<T1,T2> pairComparator, MemoryManager memoryManager, IOManager ioManager, int numMemoryPages, AbstractInvokable parentTask)

方法概要

限定符和类型	方法和说明
boolean	callWithNextKey(org.apache.flink.api.common.functions.FlatJoinFunction<T1,T2,O> joinFunction, org.apache.flink.util.Collector<O> collector) Calls the JoinFunction#join() method for all two key-value pairs that share the same key and come from different inputs.

从类继承的方法 org.apache.flink.runtime.operators.sort.AbstractMergeIterator

abort, close, createCopy, createKeyGroupedIterator, crossMatchingGroup, open

从类继承的方法 java.lang.Object

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

构造器详细资料

AbstractMergeInnerJoinIterator

public AbstractMergeInnerJoinIterator(org.apache.flink.util.MutableObjectIterator<T1> input1,
                                      org.apache.flink.util.MutableObjectIterator<T2> input2,
                                      org.apache.flink.api.common.typeutils.TypeSerializer<T1> serializer1,
                                      org.apache.flink.api.common.typeutils.TypeComparator<T1> comparator1,
                                      org.apache.flink.api.common.typeutils.TypeSerializer<T2> serializer2,
                                      org.apache.flink.api.common.typeutils.TypeComparator<T2> comparator2,
                                      org.apache.flink.api.common.typeutils.TypePairComparator<T1,T2> pairComparator,
                                      MemoryManager memoryManager,
                                      IOManager ioManager,
                                      int numMemoryPages,
                                      AbstractInvokable parentTask)
                               throws MemoryAllocationException

抛出:

MemoryAllocationException

方法详细资料

callWithNextKey

public boolean callWithNextKey(org.apache.flink.api.common.functions.FlatJoinFunction<T1,T2,O> joinFunction,
                               org.apache.flink.util.Collector<O> collector)
                        throws Exception

Calls the JoinFunction#join() method for all two key-value pairs that share the same key and come from different inputs. The output of the join() method is forwarded.

This method first zig-zags between the two sorted inputs in order to find a common key, and then calls the join stub with the cross product of the values.

指定者:

callWithNextKey 在接口中 JoinTaskIterator<T1,T2,O>

指定者:

callWithNextKey 在类中 AbstractMergeIterator<T1,T2,O>

参数:

joinFunction - The match stub containing the match function which is called with the keys.

collector - The collector to pass the match function.

返回:

True, if a next key exists, false if no more keys exist.

抛出:

Exception - Forwards all exceptions from the user code and the I/O system.

另请参阅:

JoinTaskIterator.callWithNextKey(org.apache.flink.api.common.functions.FlatJoinFunction, org.apache.flink.util.Collector)