This optimizes performance by making sure the query processor does not request metadata for any one of the linked tables until data is actually needed from the remote member table.

 
  • 这就确保了只有在真正需要远程成员表的数据时,查询处理器才会请求任一链接表的元数据,从而使性能得到优化。
今日热词
目录 附录 查词历史