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

Class MinWithRetractAggFunction<T extends Comparable<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,MinWithRetractAggFunction.MinWithRetractAccumulator<T>>

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

All Implemented Interfaces:

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

@Internal
public final class MinWithRetractAggFunction<T extends Comparable<T>>
extends BuiltInAggregateFunction<T,MinWithRetractAggFunction.MinWithRetractAccumulator<T>>

Built-in MIN with retraction aggregate function.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MinWithRetractAggFunction.MinWithRetractAccumulator<T> Accumulator for MIN with retraction.

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
void	accumulate(MinWithRetractAggFunction.MinWithRetractAccumulator<T> acc, T value)
MinWithRetractAggFunction.MinWithRetractAccumulator<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(MinWithRetractAggFunction.MinWithRetractAccumulator<T> acc)
void	merge(MinWithRetractAggFunction.MinWithRetractAccumulator<T> acc, Iterable<MinWithRetractAggFunction.MinWithRetractAccumulator<T>> its)
void	resetAccumulator(MinWithRetractAggFunction.MinWithRetractAccumulator<T> acc)
void	retract(MinWithRetractAggFunction.MinWithRetractAccumulator<T> acc, T value)

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

Constructor Detail

MinWithRetractAggFunction

public MinWithRetractAggFunction(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 extends Comparable<T>,MinWithRetractAggFunction.MinWithRetractAccumulator<T extends Comparable<T>>>

getAccumulatorDataType

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

Overrides:

getAccumulatorDataType in class BuiltInAggregateFunction<T extends Comparable<T>,MinWithRetractAggFunction.MinWithRetractAccumulator<T extends Comparable<T>>>

getOutputDataType

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

Overrides:

getOutputDataType in class BuiltInAggregateFunction<T extends Comparable<T>,MinWithRetractAggFunction.MinWithRetractAccumulator<T extends Comparable<T>>>

createAccumulator

public MinWithRetractAggFunction.MinWithRetractAccumulator<T> createAccumulator()

Specified by:

createAccumulator in class org.apache.flink.table.functions.ImperativeAggregateFunction<T extends Comparable<T>,MinWithRetractAggFunction.MinWithRetractAccumulator<T extends Comparable<T>>>

accumulate

public void accumulate(MinWithRetractAggFunction.MinWithRetractAccumulator<T> acc,
                       T value)
                throws Exception

Throws:

Exception

retract

public void retract(MinWithRetractAggFunction.MinWithRetractAccumulator<T> acc,
                    T value)
             throws Exception

Throws:

Exception

merge

public void merge(MinWithRetractAggFunction.MinWithRetractAccumulator<T> acc,
                  Iterable<MinWithRetractAggFunction.MinWithRetractAccumulator<T>> its)
           throws Exception

Throws:

Exception

resetAccumulator

public void resetAccumulator(MinWithRetractAggFunction.MinWithRetractAccumulator<T> acc)

getValue

public T getValue(MinWithRetractAggFunction.MinWithRetractAccumulator<T> acc)

Specified by:

getValue in class org.apache.flink.table.functions.AggregateFunction<T extends Comparable<T>,MinWithRetractAggFunction.MinWithRetractAccumulator<T extends Comparable<T>>>