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

Class StreamingSemiAntiJoinOperator

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>

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

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

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.state.CheckpointListener, org.apache.flink.streaming.api.operators.KeyContext, org.apache.flink.streaming.api.operators.KeyContextHandler, org.apache.flink.streaming.api.operators.SetupableStreamOperator<org.apache.flink.table.data.RowData>, org.apache.flink.streaming.api.operators.StreamOperator<org.apache.flink.table.data.RowData>, org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.CheckpointedStreamOperator, org.apache.flink.streaming.api.operators.TwoInputStreamOperator<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>

public class StreamingSemiAntiJoinOperator
extends AbstractStreamingJoinOperator

Streaming unbounded Join operator which supports SEMI/ANTI JOIN.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.table.runtime.operators.join.stream.AbstractStreamingJoinOperator

AbstractStreamingJoinOperator.AssociatedRecords, AbstractStreamingJoinOperator.OuterRecord

Field Summary

Fields inherited from class org.apache.flink.table.runtime.operators.join.stream.AbstractStreamingJoinOperator

collector, joinCondition, LEFT_RECORDS_STATE_NAME, leftInputSideSpec, leftStateRetentionTime, leftType, RIGHT_RECORDS_STATE_NAME, rightInputSideSpec, rightStateRetentionTime, rightType

Fields inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

chainingStrategy, config, lastRecordAttributes1, lastRecordAttributes2, latencyStats, LOG, metrics, output, processingTimeService

Constructor Summary

Constructors

Constructor and Description
StreamingSemiAntiJoinOperator(boolean isAntiJoin, InternalTypeInfo<org.apache.flink.table.data.RowData> leftType, InternalTypeInfo<org.apache.flink.table.data.RowData> rightType, GeneratedJoinCondition generatedJoinCondition, JoinInputSideSpec leftInputSideSpec, JoinInputSideSpec rightInputSideSpec, boolean[] filterNullKeys, long leftStateRetentionTime, long rightStateRetentionTIme)

Method Summary

Modifier and Type	Method and Description
void	open()
void	processElement1(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<org.apache.flink.table.data.RowData> element) Process an input element and output incremental joined records, retraction messages will be sent in some scenarios.
void	processElement2(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<org.apache.flink.table.data.RowData> element) Process an input element and output incremental joined records, retraction messages will be sent in some scenarios.

Methods inherited from class org.apache.flink.table.runtime.operators.join.stream.AbstractStreamingJoinOperator

close

Methods inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

finish, getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processRecordAttributes, processRecordAttributes1, processRecordAttributes2, processWatermark, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, setup, snapshotState, snapshotState

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.streaming.api.operators.TwoInputStreamOperator

processLatencyMarker1, processLatencyMarker2, processRecordAttributes1, processRecordAttributes2, processWatermark1, processWatermark2, processWatermarkStatus1, processWatermarkStatus2

Methods inherited from interface org.apache.flink.streaming.api.operators.StreamOperator

finish, getMetricGroup, getOperatorID, initializeState, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

Methods inherited from interface org.apache.flink.api.common.state.CheckpointListener

notifyCheckpointAborted, notifyCheckpointComplete

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContext

getCurrentKey, setCurrentKey

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContextHandler

hasKeyContext

Constructor Detail

StreamingSemiAntiJoinOperator

public StreamingSemiAntiJoinOperator(boolean isAntiJoin,
                                     InternalTypeInfo<org.apache.flink.table.data.RowData> leftType,
                                     InternalTypeInfo<org.apache.flink.table.data.RowData> rightType,
                                     GeneratedJoinCondition generatedJoinCondition,
                                     JoinInputSideSpec leftInputSideSpec,
                                     JoinInputSideSpec rightInputSideSpec,
                                     boolean[] filterNullKeys,
                                     long leftStateRetentionTime,
                                     long rightStateRetentionTIme)

Method Detail

open

public void open()
          throws Exception

Specified by:

open in interface org.apache.flink.streaming.api.operators.StreamOperator<org.apache.flink.table.data.RowData>

Overrides:

open in class AbstractStreamingJoinOperator

Throws:

Exception

processElement1

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

Process an input element and output incremental joined records, retraction messages will be sent in some scenarios.

Following is the pseudo code to describe the core logic of this method.

 if there is no matched rows on the other side
   if anti join, send input record
 if there are matched rows on the other side
   if semi join, send input record
 if the input record is accumulate, state.add(record, matched size)
 if the input record is retract, state.retract(record)
 

Throws:

Exception

processElement2

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

Process an input element and output incremental joined records, retraction messages will be sent in some scenarios.

Following is the pseudo code to describe the core logic of this method.

Note: "+I" represents "INSERT", "-D" represents "DELETE", "+U" represents "UPDATE_AFTER", "-U" represents "UPDATE_BEFORE".

 if input record is accumulate
 | state.add(record)
 | if there is no matched rows on the other side, skip
 | if there are matched rows on the other side
 | | if the matched num in the matched rows == 0
 | |   if anti join, send -D[other]s
 | |   if semi join, send +I/+U[other]s (using input RowKind)
 | | if the matched num in the matched rows > 0, skip
 | | otherState.update(other, old+1)
 | endif
 endif
 if input record is retract
 | state.retract(record)
 | if there is no matched rows on the other side, skip
 | if there are matched rows on the other side
 | | if the matched num in the matched rows == 0, this should never happen!
 | | if the matched num in the matched rows == 1
 | |   if semi join, send -D/-U[other] (using input RowKind)
 | |   if anti join, send +I[other]
 | | if the matched num in the matched rows > 1, skip
 | | otherState.update(other, old-1)
 | endif
 endif
 

Throws:

Exception