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

Class SumWithRetractAggFunction.LongSumWithRetractAggFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

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

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

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

All Implemented Interfaces:

Serializable, FunctionDefinition

Enclosing class:

SumWithRetractAggFunction

public static class SumWithRetractAggFunction.LongSumWithRetractAggFunction
extends SumWithRetractAggFunction

Built-in Long Sum with retract aggregate function.

See Also:

Serialized Form

Nested Class Summary

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

SumWithRetractAggFunction.ByteSumWithRetractAggFunction, SumWithRetractAggFunction.DecimalSumWithRetractAggFunction, SumWithRetractAggFunction.DoubleSumWithRetractAggFunction, SumWithRetractAggFunction.FloatSumWithRetractAggFunction, SumWithRetractAggFunction.IntSumWithRetractAggFunction, SumWithRetractAggFunction.LongSumWithRetractAggFunction, SumWithRetractAggFunction.ShortSumWithRetractAggFunction

Constructor Summary

Constructors

Constructor and Description
LongSumWithRetractAggFunction()

Method Summary

Modifier and Type	Method and Description
DataType	getResultType() The result type of the function.
protected Expression	zeroLiteral()

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

accumulateExpressions, aggBufferAttributes, getAggBufferTypes, getValueExpression, initialValuesExpressions, mergeExpressions, operandCount, retractExpressions

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

getKind, getTypeInference, mergeOperand, mergeOperands, operand, operands

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

getRequirements, isDeterministic

Constructor Detail

LongSumWithRetractAggFunction

public LongSumWithRetractAggFunction()

Method Detail

getResultType

public DataType getResultType()

Description copied from class: DeclarativeAggregateFunction

The result type of the function.

Specified by:

getResultType in class DeclarativeAggregateFunction

zeroLiteral

protected Expression zeroLiteral()

Specified by:

zeroLiteral in class SumWithRetractAggFunction