您可以使用该信息深入理解为生成执行树而执行的决策和规则。
You can use this information for advanced understanding of the decisions and rules that are executed to produce an execution tree.
重写阶段将使用该信息来确定UNION ALL分支不相交。
The rewrite phase will use this information to determine that the UNION ALL branches are disjoint.
使用该信息可以使Web框架(如果使用了的话)返回到前页。
You can use this information to force your favorite Web framework (if any is used) to return to the previous page.
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