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

Class Sum0AggFunction.DoubleSum0AggFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

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

org.apache.flink.table.planner.functions.aggfunctions.Sum0AggFunction

org.apache.flink.table.planner.functions.aggfunctions.Sum0AggFunction.DoubleSum0AggFunction

All Implemented Interfaces:

Serializable, FunctionDefinition

Enclosing class:

Sum0AggFunction

public static class Sum0AggFunction.DoubleSum0AggFunction
extends Sum0AggFunction

Built-in Double Sum0 aggregate function.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.table.planner.functions.aggfunctions.Sum0AggFunction

Sum0AggFunction.ByteSum0AggFunction, Sum0AggFunction.DecimalSum0AggFunction, Sum0AggFunction.DoubleSum0AggFunction, Sum0AggFunction.FloatSum0AggFunction, Sum0AggFunction.IntSum0AggFunction, Sum0AggFunction.LongSum0AggFunction, Sum0AggFunction.ShortSum0AggFunction

Constructor Summary

Constructors

Constructor and Description
DoubleSum0AggFunction()

Method Summary

Modifier and Type	Method and Description
DataType	getResultType() The result type of the function.
Expression[]	initialValuesExpressions() Expressions for initializing empty aggregation buffers.

Methods inherited from class org.apache.flink.table.planner.functions.aggfunctions.Sum0AggFunction

accumulateExpressions, aggBufferAttributes, getAggBufferTypes, getValueExpression, 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

DoubleSum0AggFunction

public DoubleSum0AggFunction()

Method Detail

getResultType

public DataType getResultType()

Description copied from class: DeclarativeAggregateFunction

The result type of the function.

Specified by:

getResultType in class DeclarativeAggregateFunction

initialValuesExpressions

public Expression[] initialValuesExpressions()

Description copied from class: DeclarativeAggregateFunction

Expressions for initializing empty aggregation buffers.

Specified by:

initialValuesExpressions in class DeclarativeAggregateFunction