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

Class AvgAggFunction.DoubleAvgAggFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.DeclarativeAggregateFunction

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

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

All Implemented Interfaces:

Serializable, FunctionDefinition

Enclosing class:

AvgAggFunction

public static class AvgAggFunction.DoubleAvgAggFunction
extends AvgAggFunction

Built-in Double Avg aggregate function.

See Also:

Serialized Form

Nested Class Summary

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

AvgAggFunction.ByteAvgAggFunction, AvgAggFunction.DecimalAvgAggFunction, AvgAggFunction.DoubleAvgAggFunction, AvgAggFunction.FloatAvgAggFunction, AvgAggFunction.IntAvgAggFunction, AvgAggFunction.LongAvgAggFunction, AvgAggFunction.ShortAvgAggFunction

Constructor Summary

Constructors

Constructor	Description
DoubleAvgAggFunction()

Method Summary

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

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

accumulateExpressions, adjustedMinus, adjustedPlus, aggBufferAttributes, getAggBufferTypes, getValueExpression, 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 Detail

DoubleAvgAggFunction

public DoubleAvgAggFunction()

Method Detail

getResultType

public DataType getResultType()

Description copied from class: DeclarativeAggregateFunction

The result type of the function.

Specified by:

getResultType in class DeclarativeAggregateFunction

getSumType

public DataType getSumType()

Specified by:

getSumType in class AvgAggFunction

initialValuesExpressions

public Expression[] initialValuesExpressions()

Description copied from class: DeclarativeAggregateFunction

Expressions for initializing empty aggregation buffers.

Overrides:

initialValuesExpressions in class AvgAggFunction