org.apache.flink.table.runtime.operators.join

类 SortMergeJoinOperator

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<OUT>

org.apache.flink.table.runtime.operators.TableStreamOperator<BaseRow>

org.apache.flink.table.runtime.operators.join.SortMergeJoinOperator

所有已实现的接口:

Serializable, org.apache.flink.runtime.state.CheckpointListener, org.apache.flink.streaming.api.operators.BoundedMultiInput, org.apache.flink.streaming.api.operators.KeyContext, org.apache.flink.streaming.api.operators.SetupableStreamOperator<BaseRow>, org.apache.flink.streaming.api.operators.StreamOperator<BaseRow>, org.apache.flink.streaming.api.operators.TwoInputStreamOperator<BaseRow,BaseRow,BaseRow>, org.apache.flink.util.Disposable

public class SortMergeJoinOperator
extends TableStreamOperator<BaseRow>
implements org.apache.flink.streaming.api.operators.TwoInputStreamOperator<BaseRow,BaseRow,BaseRow>, org.apache.flink.streaming.api.operators.BoundedMultiInput

An implementation that realizes the joining through a sort-merge join strategy. 1.In most cases, its performance is weaker than HashJoin. 2.It is more stable than HashJoin, and most of the data can be sorted stably. 3.SortMergeJoin should be the best choice if sort can be omitted in the case of multi-level join cascade with the same key.

NOTE: SEMI and ANTI join output input1 instead of input2. (Contrary to HashJoinOperator).

另请参阅:

序列化表格

嵌套类概要

从类继承的嵌套类/接口 org.apache.flink.streaming.api.operators.AbstractStreamOperator

org.apache.flink.streaming.api.operators.AbstractStreamOperator.CountingOutput<OUT>

字段概要

从类继承的字段 org.apache.flink.streaming.api.operators.AbstractStreamOperator

chainingStrategy, config, latencyStats, LOG, metrics, output, timeServiceManager

构造器概要

构造器

构造器和说明

SortMergeJoinOperator(double externalBufferMemRatio, FlinkJoinType type, boolean leftIsSmaller, GeneratedJoinCondition condFuncCode, GeneratedProjection projectionCode1, GeneratedProjection projectionCode2, GeneratedNormalizedKeyComputer computer1, GeneratedRecordComparator comparator1, GeneratedNormalizedKeyComputer computer2, GeneratedRecordComparator comparator2, GeneratedRecordComparator genKeyComparator, boolean[] filterNulls)

方法概要

限定符和类型	方法和说明
void	close()
void	endInput(int inputId)
void	open()
void	processElement1(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<BaseRow> element)
void	processElement2(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<BaseRow> element)

从类继承的方法 org.apache.flink.table.runtime.operators.TableStreamOperator

computeMemorySize, dispose

从类继承的方法 org.apache.flink.streaming.api.operators.AbstractStreamOperator

getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getUserCodeClassloader, initializeState, initializeState, notifyCheckpointComplete, numEventTimeTimers, numProcessingTimeTimers, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setup, snapshotState, snapshotState

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.streaming.api.operators.TwoInputStreamOperator

processLatencyMarker1, processLatencyMarker2, processWatermark1, processWatermark2

从接口继承的方法 org.apache.flink.streaming.api.operators.StreamOperator

dispose, getChainingStrategy, getMetricGroup, getOperatorID, initializeState, prepareSnapshotPreBarrier, setChainingStrategy, setKeyContextElement1, setKeyContextElement2, snapshotState

从接口继承的方法 org.apache.flink.runtime.state.CheckpointListener

notifyCheckpointComplete

从接口继承的方法 org.apache.flink.streaming.api.operators.KeyContext

getCurrentKey, setCurrentKey

构造器详细资料

SortMergeJoinOperator

public SortMergeJoinOperator(double externalBufferMemRatio,
                             FlinkJoinType type,
                             boolean leftIsSmaller,
                             GeneratedJoinCondition condFuncCode,
                             GeneratedProjection projectionCode1,
                             GeneratedProjection projectionCode2,
                             GeneratedNormalizedKeyComputer computer1,
                             GeneratedRecordComparator comparator1,
                             GeneratedNormalizedKeyComputer computer2,
                             GeneratedRecordComparator comparator2,
                             GeneratedRecordComparator genKeyComparator,
                             boolean[] filterNulls)

方法详细资料

open

public void open()
          throws Exception

指定者:

open 在接口中 org.apache.flink.streaming.api.operators.StreamOperator<BaseRow>

覆盖:

open 在类中 org.apache.flink.streaming.api.operators.AbstractStreamOperator<BaseRow>

抛出:

Exception

processElement1

public void processElement1(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<BaseRow> element)
                     throws Exception

指定者:

processElement1 在接口中 org.apache.flink.streaming.api.operators.TwoInputStreamOperator<BaseRow,BaseRow,BaseRow>

抛出:

Exception

processElement2

public void processElement2(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<BaseRow> element)
                     throws Exception

指定者:

processElement2 在接口中 org.apache.flink.streaming.api.operators.TwoInputStreamOperator<BaseRow,BaseRow,BaseRow>

抛出:

Exception

endInput

public void endInput(int inputId)
              throws Exception

指定者:

endInput 在接口中 org.apache.flink.streaming.api.operators.BoundedMultiInput

抛出:

Exception

close

public void close()
           throws Exception

指定者:

close 在接口中 org.apache.flink.streaming.api.operators.StreamOperator<BaseRow>

覆盖:

close 在类中 TableStreamOperator<BaseRow>

抛出:

Exception