org.apache.flink.table.planner.functions.aggfunctions

Class LastValueAggFunction<T>

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.ImperativeAggregateFunction<T,ACC>

org.apache.flink.table.functions.AggregateFunction<T,ACC>

org.apache.flink.table.planner.functions.aggfunctions.InternalAggregateFunction<T,org.apache.flink.table.data.RowData>

org.apache.flink.table.planner.functions.aggfunctions.LastValueAggFunction<T>

All Implemented Interfaces:

Serializable, org.apache.flink.table.functions.FunctionDefinition

@Internal
public final class LastValueAggFunction<T>
extends InternalAggregateFunction<T,org.apache.flink.table.data.RowData>

Built-in LAST_VALUE aggregate function.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
LastValueAggFunction(org.apache.flink.table.types.logical.LogicalType valueType)

Method Summary

Modifier and Type	Method and Description
void	accumulate(org.apache.flink.table.data.GenericRowData acc, org.apache.flink.table.data.StringData value)
void	accumulate(org.apache.flink.table.data.GenericRowData acc, org.apache.flink.table.data.StringData value, Long order)
void	accumulate(org.apache.flink.table.data.RowData rowData, Object value)
void	accumulate(org.apache.flink.table.data.RowData rowData, Object value, Long order)
org.apache.flink.table.data.RowData	createAccumulator()
org.apache.flink.table.types.DataType	getAccumulatorDataType()
org.apache.flink.table.types.DataType[]	getInputDataTypes()
org.apache.flink.table.types.DataType	getOutputDataType()
T	getValue(org.apache.flink.table.data.RowData rowData)
boolean	isDeterministic()
void	resetAccumulator(org.apache.flink.table.data.RowData rowData)

Methods inherited from class org.apache.flink.table.planner.functions.aggfunctions.InternalAggregateFunction

getTypeInference

Methods inherited from class org.apache.flink.table.functions.AggregateFunction

getKind

Methods inherited from class org.apache.flink.table.functions.ImperativeAggregateFunction

getAccumulatorType, getResultType

Methods inherited from class org.apache.flink.table.functions.UserDefinedFunction

close, functionIdentifier, open, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.table.functions.FunctionDefinition

getRequirements

Constructor Detail

LastValueAggFunction

public LastValueAggFunction(org.apache.flink.table.types.logical.LogicalType valueType)

Method Detail

getInputDataTypes

public org.apache.flink.table.types.DataType[] getInputDataTypes()

Specified by:

getInputDataTypes in class InternalAggregateFunction<T,org.apache.flink.table.data.RowData>

getAccumulatorDataType

public org.apache.flink.table.types.DataType getAccumulatorDataType()

Specified by:

getAccumulatorDataType in class InternalAggregateFunction<T,org.apache.flink.table.data.RowData>

getOutputDataType

public org.apache.flink.table.types.DataType getOutputDataType()

Specified by:

getOutputDataType in class InternalAggregateFunction<T,org.apache.flink.table.data.RowData>

isDeterministic

public boolean isDeterministic()

createAccumulator

public org.apache.flink.table.data.RowData createAccumulator()

Specified by:

createAccumulator in class org.apache.flink.table.functions.ImperativeAggregateFunction<T,org.apache.flink.table.data.RowData>

accumulate

public void accumulate(org.apache.flink.table.data.RowData rowData,
                       Object value)

accumulate

public void accumulate(org.apache.flink.table.data.RowData rowData,
                       Object value,
                       Long order)

accumulate

public void accumulate(org.apache.flink.table.data.GenericRowData acc,
                       org.apache.flink.table.data.StringData value)

accumulate

public void accumulate(org.apache.flink.table.data.GenericRowData acc,
                       org.apache.flink.table.data.StringData value,
                       Long order)

resetAccumulator

public void resetAccumulator(org.apache.flink.table.data.RowData rowData)

getValue

public T getValue(org.apache.flink.table.data.RowData rowData)

Specified by:

getValue in class org.apache.flink.table.functions.AggregateFunction<T,org.apache.flink.table.data.RowData>