Package org.apache.flink.table.runtime.operators.window.groupwindow.operator

Class TableAggregateWindowOperator<K,W extends Window>

java.lang.Object
org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>
org.apache.flink.table.runtime.operators.window.groupwindow.operator.WindowOperator<K,W>
org.apache.flink.table.runtime.operators.window.groupwindow.operator.TableAggregateWindowOperator<K,W>
Type Parameters:
K - The type of key returned by the KeySelector.
W - The type of Window that the WindowAssigner assigns.
All Implemented Interfaces:
Serializable, org.apache.flink.api.common.state.CheckpointListener, org.apache.flink.streaming.api.operators.Input<org.apache.flink.table.data.RowData>, org.apache.flink.streaming.api.operators.KeyContext, org.apache.flink.streaming.api.operators.KeyContextHandler, org.apache.flink.streaming.api.operators.OneInputStreamOperator<org.apache.flink.table.data.RowData,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.Triggerable<K,W>, org.apache.flink.streaming.api.operators.YieldingOperator<org.apache.flink.table.data.RowData>
public class TableAggregateWindowOperator<K,W extends Window> extends WindowOperator<K,W>
A WindowOperator for grouped and windowed table aggregates.

When an element arrives it gets assigned a key using a KeySelector and it gets assigned to zero or more windows using a GroupWindowAssigner. Based on this, the element is put into panes. A pane is the bucket of elements that have the same key and same Window. An element can be in multiple panes if it was assigned to multiple windows by the WindowAssigner.

Each pane gets its own instance of the provided Trigger. This trigger determines when the contents of the pane should be processed to emit results. When a trigger fires, the given NamespaceTableAggsHandleFunction.emitValue(Object, RowData, Collector) is invoked to produce the results that are emitted for the pane to which the Trigger belongs.

See Also:

  • Field Summary

    Fields inherited from class org.apache.flink.table.runtime.operators.window.groupwindow.operator.WindowOperator

    collector, previousState, produceUpdates, recordCounter, shiftTimeZone, windowAggregator, windowFunction

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

    combinedWatermark, config, lastRecordAttributes1, lastRecordAttributes2, latencyStats, LOG, metrics, output, processingTimeService, stateHandler, stateKeySelector1, stateKeySelector2, timeServiceManager

  • Method Summary

    Modifier and Type
    Method
    Description
    protected void
    compileGeneratedCode()
     
    protected void
    emitWindowResult(W window)
    Emits the window result of the given window.

    Methods inherited from class org.apache.flink.table.runtime.operators.window.groupwindow.operator.WindowOperator

    close, getNumLateRecordsDropped, getWatermarkLatency, onEventTime, onProcessingTime, open, processElement, useSplittableTimers

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

    beforeInitializeStateHandler, finish, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getStateKeySelector1, getStateKeySelector2, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, initializeState, isAsyncStateProcessingEnabled, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processRecordAttributes, processRecordAttributes1, processRecordAttributes2, processWatermark, processWatermark, processWatermark1, processWatermark1, processWatermark2, processWatermark2, processWatermarkStatus, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setMailboxExecutor, 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.api.common.state.CheckpointListener

    notifyCheckpointAborted, notifyCheckpointComplete

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

    processLatencyMarker, processRecordAttributes, processWatermark, processWatermark, processWatermarkStatus

    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

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

    setKeyContextElement

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

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