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MySQL 常见错误 ERROR 1044

 5 years ago
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来源:潇湘隐者 ,

www.cnblogs.com/kerrycode/p/9198566.html


从供应商那边接手一个MySQL数据库(数据库版本为5.7.21 MySQL Community Server (GPL)),在创建账号时遇到了“ERROR 1044 (42000): Access denied for user ‘root’@'localhost’ to database xxx”错误,如下所示


mysql> grant all on xxx.* to xxx@'192.168.%' identified by 'xxx';

ERROR 1044 (42000): Access denied for user 'root'@'localhost' to database 'xxxx'

mysql>


照理说,root用户应该有任何权限,那么为什么出现这个错误呢? 查看当前用户为root@localhost,顺便查看了一下各个root账号的权限。如下所示:


mysql> select current_user() from dual;

+----------------+

| current_user() |

+----------------+

| root@localhost |

+----------------+

1 row in set (0.00 sec

  

mysql> select host,user from user where user='root';

+-----------+----------+

| host      | user     |

+-----------+----------+

| %         | root     |

| 127.0.0.1 | root     |

| ::1       | root     |

| localhost | root     |

+-----------+----------+

7 rows in set (0.00 sec)

  

mysql>  show grants for root@'localhost';

+--------------------------------------------------------------+

| Grants for root@localhost                                    |

+--------------------------------------------------------------+

| GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost'            |

| GRANT PROXY ON ''@'' TO 'root'@'localhost' WITH GRANT OPTION |

+--------------------------------------------------------------+

2 rows in set (0.00 sec)

  

mysql> show grants for root@'127.0.0.1';

+---------------------------------------------------------------------+

| Grants for [email protected]                                           |

+---------------------------------------------------------------------+

| GRANT ALL PRIVILEGES ON *.* TO 'root'@'127.0.0.1' WITH GRANT OPTION |

+---------------------------------------------------------------------+

1 row in set (0.00 sec)

  

mysql> show grants for root@'%';

+-------------------------------------------+

| Grants for root@%                         |

+-------------------------------------------+

| GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' |

+-------------------------------------------+

1 row in set (0.00 sec)


如上所示,root@localhost账号没有WITH GRANT OPTION选项,关于WITH GRANT OPTION选项,如果想让授权的用户,也可以将这些权限授予给其他用户,需要选项 “WITH GRANT OPTION“ 。也就是说有这个选项就可以将权限传递给第三方。这也是上面root@localhost用户给其它用后授权报错的原因,如果以 [email protected]登录(此账号拥有WITHGRANT OPTION选项),创建用户并授权就不会有这个错误,如下所示:


# mysql -host 127.0.0.1 -u root -p

Enter password: 

  

mysql>  grant all on xxx.* to xxx@'192.168.%' identified by 'test1249';

Query OK, 0 rows affected, 1 warning (0.00 sec)

  

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)


当然还有其它方面的原因也可能会引起这个错误,不过在这个案例当中,确实仅仅是因为上面原因引起。特此记录一下这个案例@!


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