#------------mysql root 用户无法赋权问题解决 --------
1，登录 mysql -u root -p
2，use mysql; 选择mysql数据库
3，执行以下操作（查询用户的赋权权限，更改赋权权限 ，刷新生效）
mysql> select user,host,grant_priv from user;
+---------------+-----------+------------+
| user  | host | grant_priv |
+---------------+-----------+------------+
| root  | localhost | Y  |
| mysql.session | localhost | N  |
| mysql.sys | localhost | N  |
| root  | %  | N  |
| xc_admin | %  | N  |
+---------------+-----------+------------+
5 rows in set (0.00 sec)
mysql> update user set grant_priv='Y' where user = 'root';'
Query OK, 1 row affected (0.00 sec)
Rows matched: 2 Changed: 1 Warnings: 0
mysql> flush privileges;#刷新权限
Query OK, 0 rows affected (0.00 sec)
mysql> select user,host,grant_priv from user;
+---------------+-----------+------------+
| user  | host | grant_priv |
+---------------+-----------+------------+
| root  | localhost | Y  |
| mysql.session | localhost | N  |
| mysql.sys | localhost | N  |
| root  | %  | Y  |
| xc_admin | %  | N  |
+---------------+-----------+------------+
5 rows in set (0.00 sec)