org.apache.flink.table.functions

类 AggregateFunctionDefinition

java.lang.Object

org.apache.flink.table.functions.AggregateFunctionDefinition

所有已实现的接口:

FunctionDefinition

@PublicEvolving
public final class AggregateFunctionDefinition
extends Object
implements FunctionDefinition

The function definition of an user-defined aggregate function.

This class can be dropped once we introduce a new type inference.

构造器概要

构造器

构造器和说明
AggregateFunctionDefinition(String name, AggregateFunction<?,?> aggregateFunction, org.apache.flink.api.common.typeinfo.TypeInformation<?> resultTypeInfo, org.apache.flink.api.common.typeinfo.TypeInformation<?> accTypeInfo)

方法概要

限定符和类型	方法和说明
boolean	equals(Object o)
org.apache.flink.api.common.typeinfo.TypeInformation<?>	getAccumulatorTypeInfo()
AggregateFunction<?,?>	getAggregateFunction()
FunctionKind	getKind() Returns the kind of function this definition describes.
String	getName()
Set<FunctionRequirement>	getRequirements() Returns the set of requirements this definition demands.
org.apache.flink.api.common.typeinfo.TypeInformation<?>	getResultTypeInfo()
int	hashCode()
boolean	isDeterministic() Returns information about the determinism of the function's results.
String	toString()

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

构造器详细资料

AggregateFunctionDefinition

public AggregateFunctionDefinition(String name,
                                   AggregateFunction<?,?> aggregateFunction,
                                   org.apache.flink.api.common.typeinfo.TypeInformation<?> resultTypeInfo,
                                   org.apache.flink.api.common.typeinfo.TypeInformation<?> accTypeInfo)

方法详细资料

getName

public String getName()

getAggregateFunction

public AggregateFunction<?,?> getAggregateFunction()

getResultTypeInfo

public org.apache.flink.api.common.typeinfo.TypeInformation<?> getResultTypeInfo()

getAccumulatorTypeInfo

public org.apache.flink.api.common.typeinfo.TypeInformation<?> getAccumulatorTypeInfo()

getKind

public FunctionKind getKind()

从接口复制的说明: FunctionDefinition

Returns the kind of function this definition describes.

指定者:

getKind 在接口中 FunctionDefinition

getRequirements

public Set<FunctionRequirement> getRequirements()

从接口复制的说明: FunctionDefinition

Returns the set of requirements this definition demands.

指定者:

getRequirements 在接口中 FunctionDefinition

isDeterministic

public boolean isDeterministic()

从接口复制的说明: FunctionDefinition

Returns information about the determinism of the function's results.

It returns true if and only if a call to this function is guaranteed to always return the same result given the same parameters. true is assumed by default. If the function is not pure functional like random(), date(), now(), ... this method must return false.

指定者:

isDeterministic 在接口中 FunctionDefinition

equals

public boolean equals(Object o)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object