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

Class FirstValueAggFunction.LongFirstValueAggFunction

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.FirstValueAggFunction<Long>

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

All Implemented Interfaces:

Serializable, FunctionDefinition

Enclosing class:

FirstValueAggFunction<T>

public static class FirstValueAggFunction.LongFirstValueAggFunction
extends FirstValueAggFunction<Long>

Built-in Long FirstValue aggregate function.

See Also:

Serialized Form

Nested Class Summary

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

FirstValueAggFunction.BooleanFirstValueAggFunction, FirstValueAggFunction.ByteFirstValueAggFunction, FirstValueAggFunction.DecimalFirstValueAggFunction, FirstValueAggFunction.DoubleFirstValueAggFunction, FirstValueAggFunction.FloatFirstValueAggFunction, FirstValueAggFunction.IntFirstValueAggFunction, FirstValueAggFunction.LongFirstValueAggFunction, FirstValueAggFunction.ShortFirstValueAggFunction, FirstValueAggFunction.StringFirstValueAggFunction

Constructor Summary

Constructors

Constructor and Description
LongFirstValueAggFunction()

Method Summary

Modifier and Type	Method and Description
TypeInformation<Long>	getResultType() Returns the TypeInformation of the UserDefinedAggregateFunction's result.

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

accumulate, accumulate, createAccumulator, getAccumulatorType, getValue, isDeterministic, resetAccumulator

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

Constructor Detail

LongFirstValueAggFunction

public LongFirstValueAggFunction()

Method Detail

getResultType

public TypeInformation<Long> getResultType()

Description copied from class: UserDefinedAggregateFunction

Returns the TypeInformation of the UserDefinedAggregateFunction's result.

Overrides:

getResultType in class UserDefinedAggregateFunction<Long,GenericRowData>

Returns:

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