Internally, before performing the alter operation on a replicated table, the server places the table in alter mode (if it's not already in that state).

在内部，在对一个复制表执行alter操作之前，服务器使表处于alter模式(如果表还没有处于这个状态)。

youdao

Internally, before performing the alter operation on a replicated table, the server places the table in alter mode (if it's not already in that state).

在内部，在对一个复制表执行alter操作之前，服务器使表处于alter模式(如果表还没有处于这个状态)。

youdao