org.apache.flink.table.planner.utils

枚举 AggregatePhaseStrategy

java.lang.Object

java.lang.Enum<AggregatePhaseStrategy>

org.apache.flink.table.planner.utils.AggregatePhaseStrategy

所有已实现的接口:

Serializable, Comparable<AggregatePhaseStrategy>

public enum AggregatePhaseStrategy
extends Enum<AggregatePhaseStrategy>

Aggregate phase strategy which could be specified in OptimizerConfigOptions.TABLE_OPTIMIZER_AGG_PHASE_STRATEGY.

枚举常量概要

枚举常量

枚举常量和说明
AUTO No special enforcer for aggregate stage.
ONE_PHASE Enforce to use one stage aggregate which only has CompleteGlobalAggregate.
TWO_PHASE Enforce to use two stage aggregate which has localAggregate and globalAggregate.

方法概要

限定符和类型	方法和说明
static AggregatePhaseStrategy	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static AggregatePhaseStrategy[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

AUTO

public static final AggregatePhaseStrategy AUTO

No special enforcer for aggregate stage. Whether to choose two stage aggregate or one stage aggregate depends on cost.

ONE_PHASE

public static final AggregatePhaseStrategy ONE_PHASE

Enforce to use one stage aggregate which only has CompleteGlobalAggregate.

TWO_PHASE

public static final AggregatePhaseStrategy TWO_PHASE

Enforce to use two stage aggregate which has localAggregate and globalAggregate. NOTE: If aggregate call does not support split into two phase, still use one stage aggregate.

方法详细资料

values

public static AggregatePhaseStrategy[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (AggregatePhaseStrategy c : AggregatePhaseStrategy.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static AggregatePhaseStrategy valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

NullPointerException - 如果参数为空值