org.apache.flink.table.runtime.operators.aggregate

Class GroupTableAggFunction

java.lang.Object

org.apache.flink.api.common.functions.AbstractRichFunction

org.apache.flink.streaming.api.functions.KeyedProcessFunction<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>

org.apache.flink.table.runtime.operators.aggregate.GroupTableAggFunction

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.RichFunction

public class GroupTableAggFunction
extends org.apache.flink.streaming.api.functions.KeyedProcessFunction<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>

Aggregate Function used for the groupby (without window) table aggregate.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.streaming.api.functions.KeyedProcessFunction

org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context, org.apache.flink.streaming.api.functions.KeyedProcessFunction.OnTimerContext

Constructor Summary

Constructors

Constructor and Description
GroupTableAggFunction(GeneratedTableAggsHandleFunction genAggsHandler, org.apache.flink.table.types.logical.LogicalType[] accTypes, int indexOfCountStar, boolean generateUpdateBefore, boolean incrementalUpdate, long stateRetentionTime) Creates a GroupTableAggFunction.

Method Summary

Modifier and Type	Method and Description
void	close()
void	open(org.apache.flink.api.common.functions.OpenContext openContext)
void	processElement(org.apache.flink.table.data.RowData input, org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context ctx, org.apache.flink.util.Collector<org.apache.flink.table.data.RowData> out)

Methods inherited from class org.apache.flink.streaming.api.functions.KeyedProcessFunction

onTimer

Methods inherited from class org.apache.flink.api.common.functions.AbstractRichFunction

getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext

Methods inherited from class java.lang.Object

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

Constructor Detail

GroupTableAggFunction

public GroupTableAggFunction(GeneratedTableAggsHandleFunction genAggsHandler,
                             org.apache.flink.table.types.logical.LogicalType[] accTypes,
                             int indexOfCountStar,
                             boolean generateUpdateBefore,
                             boolean incrementalUpdate,
                             long stateRetentionTime)

Creates a GroupTableAggFunction.

Parameters:

genAggsHandler - The code generated function used to handle table aggregates.

accTypes - The accumulator types.

indexOfCountStar - The index of COUNT(*) in the aggregates. -1 when the input doesn't contain COUNT(*), i.e. doesn't contain retraction messages. We make sure there is a COUNT(*) if input stream contains retraction.

generateUpdateBefore - Whether this operator will generate UPDATE_BEFORE messages.

incrementalUpdate - Whether to update acc result incrementally.

stateRetentionTime - state idle retention time which unit is MILLISECONDS.

Method Detail

open

public void open(org.apache.flink.api.common.functions.OpenContext openContext)
          throws Exception

Throws:

Exception

processElement

public void processElement(org.apache.flink.table.data.RowData input,
                           org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context ctx,
                           org.apache.flink.util.Collector<org.apache.flink.table.data.RowData> out)
                    throws Exception

Specified by:

processElement in class org.apache.flink.streaming.api.functions.KeyedProcessFunction<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>

Throws:

Exception

close

public void close()
           throws Exception

Specified by:

close in interface org.apache.flink.api.common.functions.RichFunction

Overrides:

close in class org.apache.flink.api.common.functions.AbstractRichFunction

Throws:

Exception