注意如果扩展分区其中包含的任何一个分区(包括交换空间)正在使用，那么它是以这种方式锁定的。

Note that the extended partition is locked in this way if any of its contained logical partitions are in use, including swap space.

youdao

然而，对于本地索引扫描，需要锁定的分区首先要做索引搜索并发现匹配。

However, with local index scans, a partition needs to be locked first to do the index look-up and find a match.

youdao

只有发现了引用，分区才锁定。

A partition is locked only if a reference is found.

youdao