使用skip-grant-tables啟動庫後不能執行grant語句

使用skip-grant-tables選項啟動資料庫時，

不能執行 grant語句，可以對mysql.user表進行，update,delete,insert操作：

[mysql@localhost ~]$ mysqld_safe --skip-grant-tables 
[mysql@localhost ~]$ mysql 
Welcome to the MySQL monitor. Commands end with ; or \g. 
Your MySQL connection id is 3 
Server version: 5.6.23-enterprise-commercial-advanced-log MySQL Enterprise Server - Advanced Edition (Commercial) 

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. 

Oracle is a registered trademark of Oracle Corporation and/or its 
affiliates. Other names may be trademarks of their respective 
owners. 

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. 

mysql> use mysql 
Reading table information for completion of table and column names 
You can turn off this feature to get a quicker startup with -A 

Database changed 


mysql> select user,host from user; 
+-----------+-----------------------+ 
| user | host | 
+-----------+-----------------------+ 
| root | % | 
| song | % | 
| song_test | % | 
| root | 127.0.0.1 | 
| root | ::1 | 
| root | localhost | 
| root | localhost.localdomain | 
+-----------+-----------------------+ 
7 rows in set (0.00 sec) 


mysql> grant all on *.* to 'test'@'%' identified by 'test'; 
ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement 
mysql> insert into user (user,host) values ('test','%'); 
ERROR 1364 (HY000): Field 'ssl_cipher' doesn't have a default value 
mysql> UPDATE user SET Password=PASSWORD('123456') where USER='root'; 
Query OK, 3 rows affected (0.03 sec) 
Rows matched: 5 Changed: 3 Warnings: 0 

mysql> delete from user where user='root' and host='::1'; 
Query OK, 1 row affected (0.01 sec) 

mysql> INSERT INTO user VALUES('%','test',PASSWORD('test'),'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', '','', '','','0','0','0','0','','','Y'); 
Query OK, 1 row affected (0.01 sec) 

mysql> flush privileges; 
Query OK, 0 rows affected (0.00 sec) 

mysql> select user,host from mysql.user; 
+-----------+-----------------------+ 
| user | host | 
+-----------+-----------------------+ 
| root | % | 
| song | % | 
| song_test | % | 
| test | % | 
| root | 127.0.0.1 | 
| root | localhost | 
| root | localhost.localdomain | 
+-----------+-----------------------+ 
7 rows in set (0.00 sec) 

mysql> exit 
Bye 
[mysql@localhost ~]$ mysqladmin shutdown -u root 
mysqladmin: connect to server at 'localhost' failed 
error: 'Access denied for user 'root'@'localhost' (using password: NO)' 
[mysql@localhost ~]$ mysqladmin shutdown 
mysqladmin: connect to server at 'localhost' failed 
error: 'Access denied for user 'mysql'@'localhost' (using password: NO)' 
[mysql@localhost ~]$ mysqladmin shutdown -u root -p 
Enter password: 
[mysql@localhost ~]$ 
[mysql@localhost ~]$ service mysql start 
Starting MySQL. SUCCESS! 
[mysql@localhost ~]$ 
[mysql@localhost ~]$ mysql -u test -p 
Enter password: 
Welcome to the MySQL monitor. Commands end with ; or \g. 
Your MySQL connection id is 3 
Server version: 5.6.23-enterprise-commercial-advanced-log 

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. 

Oracle is a registered trademark of Oracle Corporation and/or its 
affiliates. Other names may be trademarks of their respective 
owners. 

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. 

mysql> desc mysql.user; 
ERROR 1820 (HY000): You must SET PASSWORD before executing this statement 

mysql> SET PASSWORD=PASSWORD('123456'); 
Query OK, 0 rows affected (0.00 sec)