From the merged record, we should have all of the information we need.

从合并的记录，我们应该有我们需要的所有信息。

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The reason conflicting gap locks are allowed is that if a record is purged from an index, the gap locks held on the record by different transactions must be merged.

间隙锁之所以会冲突，是因为当一条记录从索引中移除，不同的事务在这条记录上加的锁就必须合并。

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