When you use the ONLINE keyword, DDL operations execute without applying an exclusive lock to the table on which the specified index is defined.
在使用ONLINE关键字时，DDL操作是在没有将排它锁应用于定义特定索引表的情况下执行的。
I have the limits of authority that carries out DDL statement on this piece of watch, and the lock that also did not prevent it to be founded afresh on this piece of watch.
我具有在这张表上执行ddl语句的权限，而在这张表上也没有阻止它重新创建的锁。
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