今天接到一开发反应，他们项目远程连接mysql ，有一张视图不能访问，出现以下错误：
因为每个项目都是单独分用户出去
[root@localhost ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 25538
Server version: 5.5.29-log MySQL Community Server (GPL)
Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> select * from v_challenge_rank;
ERROR 1449 (HY000): The user specified as a definer ('root'@'%') does not exist
mysql> select table_schema,table_name,definer from views;
+---------------+------------------+---------+
| table_schema | table_name | definer |
+---------------+------------------+---------+
| wx_characters | v_challenge_rank | root@% |
+---------------+------------------+---------+
因为mysql 用root用户创建视图，权限只会赋给创建视图的用户
这个视图不是他们项目组用户创建的，所以用户没有权限访问。
用该用户重建视图、恢复正常！
show create view c_challenge
create or replace view v_challenge as select * from challenge