场景：最近重新将云端上的MySQL 数据导入本地，启动项目爆出异常信息，the user specified as a definer (‘police_admin’@’%’) does not exist，解决办法如下；
mysql> grant all privileges on . to police_admin@"%" identified by “.”;
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
给police_admin 赋予视图权限就可以了；