MySQL 服务在尝试向用户授予权限后停止

Question

我正在使用 MySQL 5.6，我试图为特定数据库创建一个超级用户，但我得到了

ERROR 1396 (HY000): Operation CREATE USER failed for 'superuser'@'%'

然后我想也许已经有一个用户名和密码相同。我刷新了权限并运行以下查询：

grant all privileges on db1.* to 'superuser'@'localhost' 

在该查询之后，我得到：ERROR 2013 (HY000): Lost connection to MySQL server during query 并且 MySQL 服务停止工作。

Answer 1

我认为您的问题归结为拨款错位。

当您运行此查询时

SELECT COUNT(1) column_count FROM information_schema.columns
WHERE table_schema='mysql' AND table_name='user';

你应该是以下号码

• 如果你得到 43，MySQL 5.6
• 如果你得到 42，MySQL 5.5
• 如果你得到 39，MySQL 5.1
• 如果你得到 37，MySQL 5.0

这只是意味着您又忘记了一个升级步骤

# mysql_upgrade --upgrade-system-tables

这应该填写缺失的列。

我之前讨论过这个

• May 01, 2013:我可以从数据文件中找出 MySQL 的版本吗？
• Apr 24, 2014: mysql: 恢复管理员用户的所有权限 (StackOverflow)

既然你说mysql.user有 39，那意味着mysql_upgrade --upgrade-system-tables当你从 MySQL 5.1 到 MySQL 5.5 时你没有运行。

老实说，我不知道mysql_upgrade --upgrade-system-tables在 MySQL 5.6 中运行是否会成功地重新调整mysql.user两个版本。

我建议通过执行以下操作来制作副本

net stop mysql
cd D:\MySQL\mysql
copy user.frm user1.frm
copy user.MYD user1.MYD
copy user.MYI user1.MYI
net start mysql

复制后，继续运行mysql_upgrade --upgrade-system-tables。登录mysql并SELECT COUNT(1) column_count FROM information_schema.columns WHERE table_schema='mysql' AND table_name='user';再次运行。希望它会读到 43。

如果没有，请像这样复制用户文件

net stop mysql
cd D:\MySQL\mysql
del user.*
move user1.frm user.frm
move user1.MYD user.MYD
move user1.MYI user.MYI
net start mysql

如果您想手动更改设计，请尝试以下操作：

使用 MySQL 5.6 布局创建 mysql.user_new

CREATE TABLE mysql.user_new (
  `Host` char(60) COLLATE utf8_bin NOT NULL DEFAULT '',
  `User` char(16) COLLATE utf8_bin NOT NULL DEFAULT '',
  `Password` char(41) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT '',
  `Select_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Insert_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Update_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Delete_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Create_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Drop_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Reload_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Shutdown_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Process_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `File_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Grant_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `References_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Index_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Alter_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Show_db_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Super_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Create_tmp_table_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Lock_tables_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Execute_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Repl_slave_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Repl_client_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Create_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Show_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Create_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Alter_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Create_user_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Event_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Trigger_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Create_tablespace_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `ssl_type` enum('','ANY','X509','SPECIFIED') CHARACTER SET utf8 NOT NULL DEFAULT '',
  `ssl_cipher` blob NOT NULL,
  `x509_issuer` blob NOT NULL,
  `x509_subject` blob NOT NULL,
  `max_questions` int(11) unsigned NOT NULL DEFAULT '0',
  `max_updates` int(11) unsigned NOT NULL DEFAULT '0',
  `max_connections` int(11) unsigned NOT NULL DEFAULT '0',
  `max_user_connections` int(11) unsigned NOT NULL DEFAULT '0',
  `plugin` char(64) COLLATE utf8_bin DEFAULT '',
  `authentication_string` text COLLATE utf8_bin,
  `password_expired` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  PRIMARY KEY (`Host`,`User`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Users and global privileges';

将赠款从旧转移到新

INSERT INTO mysql.user_new
(Host,User,Password,Select_priv,Insert_priv,Update_priv,Delete_priv,
Create_priv,Drop_priv,Reload_priv,Shutdown_priv,Process_priv,File_priv,
Grant_priv,References_priv,Index_priv,Alter_priv,Show_db_priv,Super_priv,
Create_tmp_table_priv,Lock_tables_priv,Execute_priv,Repl_slave_priv,
Repl_client_priv,Create_view_priv,Show_view_priv,Create_routine_priv,
Alter_routine_priv,Create_user_priv,Event_priv,Trigger_priv,ssl_type,
ssl_cipher,x509_issuer,x509_subject,max_questions,
max_updates,max_connections,max_user_connections)
SELECT
Host,User,Password,Select_priv,Insert_priv,Update_priv,Delete_priv,
Create_priv,Drop_priv,Reload_priv,Shutdown_priv,Process_priv,File_priv,
Grant_priv,References_priv,Index_priv,Alter_priv,Show_db_priv,Super_priv,
Create_tmp_table_priv,Lock_tables_priv,Execute_priv,Repl_slave_priv,
Repl_client_priv,Create_view_priv,Show_view_priv,Create_routine_priv,
Alter_routine_priv,Create_user_priv,Event_priv,Trigger_priv,ssl_type,
ssl_cipher,x509_issuer,x509_subject,max_questions,
max_updates,max_connections,max_user_connections
FROM mysql.user;

更新Create_tablespace_priv为root

UPDATE mysql.user_new SET Create_tablespace_priv='Y' WHERE user = 'root'; 

调节开关

ALTER TABLE mysql.user RENAME mysql.user_old;
ALTER TABLE mysql.user_new RENAME mysql.user;
FLUSH PRIVILEGES;

试一试，看看是否一切正常！！！