測試的版本為5.6.30REPLICATION SLAVE常用于建立復制時所需要用到的用戶權(quán)限，也就是slave server必須被master server授權(quán)具有該權(quán)限的用戶，才能通過該用戶復制。
并且"SHOW SLAVE HOSTS"這條命令和REPLICATION SLAVE權(quán)限有關(guān)，否則執(zhí)行時會報錯：
ERROR 1227(42000): Access denied; you need(at least oneof) the REPLICATION SLAVE privilege(s) for this operation
REPLICATION CLIENT不可用于建立復制，有該權(quán)限時，只是多了可以使用如"SHOW SLAVE STATUS"、"SHOW MASTER STATUS"等命令。
在5.6.6版本以后，也可以使用"SHOW BINARY LOGS"。
原文：
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The REPLICATION CLIENT privilege enables the use of SHOW MASTER STATUS and SHOW SLAVE STATUS. In MySQL 5.6.6 and later, it also enables the use of the SHOW BINARY LOGS statement.
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The REPLICATION SLAVE privilege should be granted to accounts that are used by slave servers to connect to the current server as their master. Without this privilege, the slave cannot request updates that have been made to databases on the master server.
參考文獻：
MySQL 5.6 Reference Manual - 6.2.1 Privileges Provided by MySQL
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網(wǎng)站標題：REPLICATIONSLAVE與REPLICATIONCLIENT權(quán)限
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