Package org.apache.flink.table.runtime.functions.aggregate

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.runtime.functions.aggregate.BuiltInAggregateFunction<T,org.apache.flink.table.data.RowData>

org.apache.flink.table.runtime.functions.aggregate.LastValueAggFunction<T>

All Implemented Interfaces:

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

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

Built-in LAST_VALUE aggregate function.

See Also:

Serialized Form

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	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()
List<org.apache.flink.table.types.DataType>	getArgumentDataTypes()
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.runtime.functions.aggregate.BuiltInAggregateFunction

getRequirements, 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

Constructor Detail

LastValueAggFunction

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

Method Detail

getArgumentDataTypes

public List<org.apache.flink.table.types.DataType> getArgumentDataTypes()

Overrides:

getArgumentDataTypes in class BuiltInAggregateFunction<T,org.apache.flink.table.data.RowData>

getAccumulatorDataType

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

Overrides:

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

getOutputDataType

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

Overrides:

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

isDeterministic

public boolean isDeterministic()

Specified by:

isDeterministic in interface org.apache.flink.table.functions.FunctionDefinition

Overrides:

isDeterministic in class BuiltInAggregateFunction<T,org.apache.flink.table.data.RowData>

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>