An entry is added to the system catalog to indicate to the query optimizer that such a remote index exists.
一个条目被添加到系统编目中，以向查询优化器表明存在那样的一个远程索引。
It is also possible that a remote index is added to the remote object on the data source after the creation of the nickname.
在昵称创建后，可能会添加一个远程索引到数据源上的远程对象。
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