显示具有数据库任何权限的用户.MySQL的

Question

我必须选择所有具有数据库权限的用户(例如数据库'mysql').有什么建议？谢谢.

Answer 1

所有用户及其近似特权的良好视图.如果有密码,它将通过加密字符串; 如果没有,此字段为空白.选择是一种非常普遍的特权; insert允许在数据库中进行表操作; shutdown允许主要系统更改,并且只能由root用户使用; 授予权限的能力与其他权限是分开的.

SELECT user, host, password, select_priv, insert_priv, shutdown_priv, grant_priv 
FROM mysql.user

查看各个数据库的权限.

SELECT user, host, db, select_priv, insert_priv, grant_priv FROM mysql.db

Answer 2

• 数据库权限存储在mysql.db

• 表权限存储在mysql.tables_priv

• 列权限存储在mysql.columns_priv

• 例程特权存储在mysql.proc_privs

您可以定义存储过程以列出权限:

delimiter //

CREATE PROCEDURE list_privileges (IN db_name CHAR(50))
BEGIN
    SELECT concat(Db,'.', '*') as 'what', User, Host, '...' as 'perms'
    FROM mysql.db
    WHERE Db=db_name
    UNION
    SELECT concat(Db,'.', Table_name), User, Host, table_priv
    FROM mysql.tables_priv
    WHERE Db=db_name and table_priv != ''
    UNION
    SELECT concat(Db,'.', Table_name, '(', Column_name,')'), User, Host, Column_priv
    FROM mysql.columns_priv
    WHERE Db=db_name
    UNION
    SELECT concat(Db,'.', Routine_name, '()'), User, Host, Proc_priv
    FROM mysql.procs_priv
    WHERE Db=db_name;
END//

delimiter ;

例:

mysql> call list_privileges("testlink2");
+-----------------------------+-----------+-----------+---------+
| what                        | User      | Host      | perms   |
+-----------------------------+-----------+-----------+---------+
| testlink2.*                 | testlink2 | %         | ...     |
| testlink2.*                 | testlink2 | localhost | ...     |
| testlink2.executions        | testlink2 | %         | Select  |
| testlink2.users(id)         | testlink2 | %         | Select  |
| testlink2.list_privileges() | testlink2 | %         | Execute |
+-----------------------------+-----------+-----------+---------+
5 rows in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Answer 3

查看mysql数据库(mysql在mysql服务器内部命名的实际数据库,只是为了清楚).有三个表(db,tables_priv和columns_priv)存储db/table/column privs:

SELECT 'db', User, Host
FROM db
WHERE Db='mydatabase'

UNION

SELECT 'table', User, Host
FROM tables_priv
WHERE Db='mydatabase'

UNION

SELECT 'col', User, Host
FROM columns_priv
WHERE Db='mydatabase'

应该告诉你你需要什么.