discuz X2如何清空所有用户短消息？

后台和ucenter都找不到。只能看到删除单个用户的短消息选项。tools工具里面也是一样。

我现在想要全部清空，请问该怎么弄？有什么mysql升级命令或者说PM清除哪几个表可以实现呢？

DELETE FROM `pre_ucenter_pm_messages_0` WHERE 1 ;

DELETE FROM `pre_ucenter_pm_messages_1` WHERE 1 ;

DELETE FROM `pre_ucenter_pm_messages_2` WHERE 1 ;

DELETE FROM `pre_ucenter_pm_messages_3` WHERE 1 ;

DELETE FROM `pre_ucenter_pm_messages_4` WHERE 1 ;

DELETE FROM `pre_ucenter_pm_messages_5` WHERE 1 ;

DELETE FROM `pre_ucenter_pm_messages_6` WHERE 1 ;

DELETE FROM `pre_ucenter_pm_messages_7` WHERE 1 ;

DELETE FROM `pre_ucenter_pm_messages_8` WHERE 1 ;

DELETE FROM `pre_ucenter_pm_messages_9` WHERE 1 ;