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MySQL:无法创建用户 ERROR 1045

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Release: 2016-06-07 17:30:23
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今天在安装完MySQL后清理多余用户时,不小心把root@localhost也删除了,后来重新添加上了,然后想添加用户给远程机器连接用,结果

今天在安装完MySQL后清理多余用户时,不小心把root@localhost也删除了,后来重新添加上了,然后想添加用户给远程机器连接用,结果就出现了不能添加用户的事情。


mysql> select user();
+----------------+
| user()        |
+----------------+
| root@localhost |
+----------------+
1 row in set (0.00 sec)
mysql> grant select on *.* to baichi@localhost identified by 'baichi';
ERROR 1045 (28000): Access denied for user 'new'@'localhost' (using password: YES)
  当时脑子就短路了,root添加不了用户?
  赶紧查看MySQL手册
错误:1045 SQLSTATE: 28000 (ER_ACCESS_DENIED_ERROR)
消息:拒绝用户'%s'@'%s'的访问(使用密码:%s)
  还是不理解,为什么root不行。于是到处搜索,关于1045错误的搜索结果有不少,可看来看去觉得没什么关系。后来关闭MySQL,,删除data目录重新创建数据库,这样就没事了,但问题的原因没找到。
  看看别人的帖子,在添加用户时都加了个with grant option,觉得应该是因为没有加这个,所以不能创建用户。于是查看了下创建root@localhost的语句:
mysql> show grants for root@localhost;
+---------------------------------------------------------------------+
| Grants for root@localhost                                          |
+---------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'127.0.0.1' WITH GRANT OPTION |
+---------------------------------------------------------------------+
1 row in set (0.00 sec)


  我再创建两个用户,一个带一个不带with grant option看看
mysql> grant all privileges on *.* to new@localhost;
Query OK, 0 rows affected (0.00 sec)


mysql> show grants for new@localhost;
+---------------------------------------------------------------------------------------------------------------------+
| Grants for new@localhost                                                                                            |
+---------------------------------------------------------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'new'@'localhost' IDENTIFIED BY PASSWORD '*0479CC8AA5F52BEB2CF57050533F16EDEE15F6A0' |
+---------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> grant all privileges on *.* to 2new@localhost with grant option;
Query OK, 0 rows affected (0.00 sec)


mysql> show grants for 2new@localhost;
+---------------------------------------------------------------------+
| Grants for 2new@localhost                                          |
+---------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO '2new'@'localhost' WITH GRANT OPTION |
+---------------------------------------------------------------------+
1 row in set (0.00 sec)


然后分别用这两个用户登陆,去创建用户,结果发现带with grant option的用户才能创建。
至此问题找到了。原以为all privileges就包括了创建用户的权限,所以在创建root@localhost时没有添加with grant option,才导致了开头说的出现1045错误。

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