Error: ER_NO_SUCH_USER: The user specified as a definer ('root'@'localhost') does not exist

最简单的解决办法：

1. 授权

grant all on *.* to 'ROOT'@'%' identified by 'PASSWORD' with grant option;

或者：
grant all privileges on *.* to 'root'@'localhost';

2. 刷新权限

flush privileges;