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

Class FirstValueWithRetractAggFunction.BooleanFirstValueWithRetractAggFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

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

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

org.apache.flink.table.planner.functions.aggfunctions.FirstValueWithRetractAggFunction<Boolean>

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

All Implemented Interfaces:

Serializable, FunctionDefinition

Enclosing class:

FirstValueWithRetractAggFunction<T>

public static class FirstValueWithRetractAggFunction.BooleanFirstValueWithRetractAggFunction
extends FirstValueWithRetractAggFunction<Boolean>

Built-in Boolean FirstValue with retract aggregate function.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.table.planner.functions.aggfunctions.FirstValueWithRetractAggFunction

FirstValueWithRetractAggFunction.BooleanFirstValueWithRetractAggFunction, FirstValueWithRetractAggFunction.ByteFirstValueWithRetractAggFunction, FirstValueWithRetractAggFunction.DecimalFirstValueWithRetractAggFunction, FirstValueWithRetractAggFunction.DoubleFirstValueWithRetractAggFunction, FirstValueWithRetractAggFunction.FloatFirstValueWithRetractAggFunction, FirstValueWithRetractAggFunction.IntFirstValueWithRetractAggFunction, FirstValueWithRetractAggFunction.LongFirstValueWithRetractAggFunction, FirstValueWithRetractAggFunction.ShortFirstValueWithRetractAggFunction, FirstValueWithRetractAggFunction.StringFirstValueWithRetractAggFunction

Constructor Summary

Constructors

Constructor and Description
BooleanFirstValueWithRetractAggFunction()

Method Summary

Modifier and Type	Method and Description
protected TypeSerializer<Boolean>	createValueSerializer()
TypeInformation<Boolean>	getResultType() Returns the TypeInformation of the UserDefinedAggregateFunction's result.

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

accumulate, accumulate, createAccumulator, getAccumulatorType, getValue, resetAccumulator, retract, retract

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

getKind, getRequirements, getTypeInference, requiresOver

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

isDeterministic

Constructor Detail

BooleanFirstValueWithRetractAggFunction

public BooleanFirstValueWithRetractAggFunction()

Method Detail

getResultType

public TypeInformation<Boolean> getResultType()

Description copied from class: UserDefinedAggregateFunction

Returns the TypeInformation of the UserDefinedAggregateFunction's result.

Overrides:

getResultType in class UserDefinedAggregateFunction<Boolean,GenericRowData>

Returns:

The TypeInformation of the UserDefinedAggregateFunction's result or null if the result type should be automatically inferred.

createValueSerializer

protected TypeSerializer<Boolean> createValueSerializer()

Specified by:

createValueSerializer in class FirstValueWithRetractAggFunction<Boolean>