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

Class SumWithRetractAggFunction.DoubleSumWithRetractAggFunction

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.DoubleSumWithRetractAggFunction

All Implemented Interfaces:

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

Enclosing class:

SumWithRetractAggFunction

public static class SumWithRetractAggFunction.DoubleSumWithRetractAggFunction
extends SumWithRetractAggFunction

Built-in Double 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
DoubleSumWithRetractAggFunction()

Method Summary

Modifier and Type	Method and Description
org.apache.flink.table.types.DataType	getResultType() The result type of the function.
protected org.apache.flink.table.expressions.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

DoubleSumWithRetractAggFunction

public DoubleSumWithRetractAggFunction()

Method Detail

getResultType

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

Description copied from class: DeclarativeAggregateFunction

The result type of the function.

Specified by:

getResultType in class DeclarativeAggregateFunction

zeroLiteral

protected org.apache.flink.table.expressions.Expression zeroLiteral()

Specified by:

zeroLiteral in class SumWithRetractAggFunction