仅在创建该数据库后，无法以 root 身份访问某些数据库

Question

作为 root@localhost

mysql> CREATE USER 'aaa'@'%';
Query OK, 0 rows affected (0.00 sec)

mysql> GRANT USAGE ON * . * TO 'aaa'@'%' WITH MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0 ;
Query OK, 0 rows affected (0.00 sec)

mysql> CREATE DATABASE IF NOT EXISTS `aaa` ;
Query OK, 1 row affected (0.00 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

mysql> GRANT ALL PRIVILEGES ON `aaa` . * TO 'aaa'@'%';
ERROR 1044 (42000): Access denied for user 'root'@'localhost' to database 'aaa'

这是怎么回事..为什么会出现这个错误？

mysql> show grants;
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Grants for root@localhost                                                                                                                                                                                                                                                                                                                                                                                        |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, RELOAD, SHUTDOWN, PROCESS, FILE, REFERENCES, INDEX, ALTER, SHOW DATABASES, SUPER, CREATE TEMPORARY TABLES, LOCK TABLES, EXECUTE, REPLICATION SLAVE, REPLICATION CLIENT, CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, CREATE USER ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD '*B67132C4A56F2FFFE0AA531DECF0C98895F9CB9B' WITH GRANT OPTION |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

Answer 1

我过去遇到过这种情况，我的解决方案是显式连接到 127.0.0.1 而不是 localhost 别名

mysql -uroot -h127.0.0.1 

希望对你有用！

Answer 2

权限不够。您正在尝试授予 ALL 权限。但是，用户 'root'@'localhost' 没有 ALL 权限。

“SHOW GRANTS”命令已输出权限列表 - GRANT SELECT, INSERT,...

但应该是这样的——GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost'...

首先将所有权限授予root帐户，或者仅授予未授予的权限。

Answer 3

在 5.7 中有点精度：

mysql -uroot -h127.0.0.1  -p

GRANT ALL PRIVILEGES ON *.* TO 'root';

quit

然后

mysql -u root  -h mynode mydb -p

工作正常