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

Class SumWithRetractAggFunction.DoubleSumWithRetractAggFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.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	Description
DoubleSumWithRetractAggFunction()

Method Summary

Modifier and Type	Method	Description
org.apache.flink.table.types.DataType	getResultType()
protected org.apache.flink.table.expressions.Expression	zeroLiteral()

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

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

Methods inherited from class org.apache.flink.table.functions.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, supportsConstantFolding

Constructor Details

DoubleSumWithRetractAggFunction

public DoubleSumWithRetractAggFunction()

Method Details

getResultType

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

Specified by:

getResultType in class org.apache.flink.table.functions.DeclarativeAggregateFunction

zeroLiteral

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

Specified by:

zeroLiteral in class SumWithRetractAggFunction