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

Class FirstValueWithRetractAggFunction<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,FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T>>

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

All Implemented Interfaces:

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

@Internal
public final class FirstValueWithRetractAggFunction<T>
extends BuiltInAggregateFunction<T,FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T>>

Built-in FIRST_VALUE with retraction aggregate function.

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T>	Accumulator for FIRST_VALUE.

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
void	accumulate(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc, Object value)
void	accumulate(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc, Object value, Long order)
void	accumulate(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc, org.apache.flink.table.data.StringData value)
void	accumulate(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc, org.apache.flink.table.data.StringData value, Long order)
FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T>	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(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc)
void	resetAccumulator(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc)
void	retract(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc, Object value)
void	retract(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc, Object value, Long order)

Methods inherited from class org.apache.flink.table.runtime.functions.aggregate.BuiltInAggregateFunction

getRequirements, getTypeInference, isDeterministic

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

supportsConstantFolding

Constructor Details

FirstValueWithRetractAggFunction

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

Method Details

getArgumentDataTypes

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

Overrides:

getArgumentDataTypes in class BuiltInAggregateFunction<T,FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T>>

getAccumulatorDataType

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

Overrides:

getAccumulatorDataType in class BuiltInAggregateFunction<T,FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T>>

getOutputDataType

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

Overrides:

getOutputDataType in class BuiltInAggregateFunction<T,FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T>>

createAccumulator

public FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> createAccumulator()

Specified by:

createAccumulator in class org.apache.flink.table.functions.ImperativeAggregateFunction<T,FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T>>

accumulate

public void accumulate(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc,
 Object value)
                throws Exception

Throws:

Exception

accumulate

public void accumulate(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc,
 Object value,
 Long order)
                throws Exception

Throws:

Exception

accumulate

public void accumulate(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc,
 org.apache.flink.table.data.StringData value)
                throws Exception

Throws:

Exception

accumulate

public void accumulate(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc,
 org.apache.flink.table.data.StringData value,
 Long order)
                throws Exception

Throws:

Exception

retract

public void retract(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc,
 Object value)
             throws Exception

Throws:

Exception

retract

public void retract(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc,
 Object value,
 Long order)
             throws Exception

Throws:

Exception

resetAccumulator

public void resetAccumulator(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc)

getValue

public T getValue(FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T> acc)

Specified by:

getValue in class org.apache.flink.table.functions.AggregateFunction<T,FirstValueWithRetractAggFunction.FirstValueWithRetractAccumulator<T>>