mysql中grants小记

安装mycheckpoint的时候，给这个监控用户分权限的时候，发现了这个秘密：

mysql> 
mysql> GRANT ALL PRIVILEGES ON mycheckpoint.* TO 'mycheckpoint_user'@'localhost' IDENTIFIED BY '123456';                            
ERROR 1470 (HY000): String 'mycheckpoint_user' is too long for user name (should be no longer than 16)
mysql>