com.dangdang.ddframe.rdb.sharding.merger

类 ResultSetMergeContext

java.lang.Object

com.dangdang.ddframe.rdb.sharding.merger.ResultSetMergeContext

public final class ResultSetMergeContext
extends Object

结果集归并上下文.

作者:

zhangliang

构造器概要

构造器

构造器和说明
ResultSetMergeContext(ShardingResultSets shardingResultSets, MergeContext mergeContext)

方法概要

限定符和类型	方法和说明
boolean	isNeedMemorySortForGroupBy() 判断分组归并是否需要内存排序.
boolean	isNeedMemorySortForOrderBy() 判断排序归并是否需要内存排序.
void	setGroupByKeysToCurrentOrderByKeys() 将分组顺序设置为排序序列.
void	setOrderByKeysToCurrentOrderByKeys() 将排序顺序设置为排序序列.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

ResultSetMergeContext

public ResultSetMergeContext(ShardingResultSets shardingResultSets,
                             MergeContext mergeContext)
                      throws SQLException

抛出:

SQLException

方法详细资料

isNeedMemorySortForGroupBy

public boolean isNeedMemorySortForGroupBy()

判断分组归并是否需要内存排序.

返回:

分组归并是否需要内存排序

setGroupByKeysToCurrentOrderByKeys

public void setGroupByKeysToCurrentOrderByKeys()

将分组顺序设置为排序序列.

isNeedMemorySortForOrderBy

public boolean isNeedMemorySortForOrderBy()

判断排序归并是否需要内存排序.

返回:

排序归并是否需要内存排序

setOrderByKeysToCurrentOrderByKeys

public void setOrderByKeysToCurrentOrderByKeys()

将排序顺序设置为排序序列.