mysql-创建用户报错ERROR 1396 (HY000): Operation CREATE USER failed for 'XXXX'@'XXXX'

创建用户： 
create user ‘test’@’%’ identified by ‘test’; 
显示ERROR 1396 (HY000): Operation CREATE USER failed for ‘test’@’%’ 
查看是不是存在这个用户 
select user from user; 
发现没有这个用户。 
记得上次有删除过这个用户。可能没有刷新权限 
flush privileges; 
之后还是不行报错ERROR 1396 (HY000): Operation CREATE USER failed for ‘test’@’%’ 
没办法再删除一次： 
drop user ‘test’@’%’; 
flush privileges; 
之后create user ‘test’@’%’ identified by ‘test’; 
成功。 
网上找了下原因： 
Assume the user is there, so drop the user 
After deleting the user, there is need to flush the mysql privileges 
Now create the user.

http://stackoverflow.com/questions/5555328/error-1396-hy000-operation-create-user-failed-for-jacklocalhost

转自：http://blog.csdn.net/u011575570/article/details/51438841