您的位置：首页 > 数据库 > MySQL

MySQL 查看用户授予的权限

2017-08-24 16:40 302 查看

在MySQL中，如何查看一个用户被授予了那些权限呢？授予用户的权限可能分全局层级权限、数据库层级权限、表层级别权限、列层级别权限、子程序层级权限。具体分类如下：

全局层级

全局权限适用于一个给定服务器中的所有数据库。这些权限存储在mysql.user表中。GRANTALLON*.*和REVOKEALLON*.*只授予和撤销全局权限。

数据库层级

数据库权限适用于一个给定数据库中的所有目标。这些权限存储在mysql.db和mysql.host表中。GRANTALLONdb_name.*和REVOKEALLONdb_name.*只授予和撤销数据库权限。

表层级

表权限适用于一个给定表中的所有列。这些权限存储在mysql.tables_priv表中。GRANTALLONdb_name.tbl_name和REVOKEALLONdb_name.tbl_name只授予和撤销表权限。

列层级

列权限适用于一个给定表中的单一列。这些权限存储在mysql.columns_priv表中。当使用REVOKE时，您必须指定与被授权列相同的列。

子程序层级

CREATEROUTINE,ALTERROUTINE,EXECUTE和GRANT权限适用于已存储的子程序。这些权限可以被授予为全局层级和数据库层级。而且，除了CREATEROUTINE外，这些权限可以被授予为子程序层级，并存储在mysql.procs_priv表中。

1：那么我们来创建一个测试账号test，授予全局层级的权限。如下所示：

mysql>grantselect,inserton*.*totest@'%'identifiedby'test';

QueryOK,0rowsaffected(0.01sec)

mysql>flushprivileges;

QueryOK,0rowsaffected(0.00sec)

mysql>

那么可以用下面两种方式查询授予test的权限。如下所示：

mysql>showgrantsfortest;

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

|Grantsfortest@%|

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

|GRANTSELECT,INSERTON*.*TO'test'@'%'IDENTIFIEDBYPASSWORD'*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29'|

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

1rowinset(0.00sec)

mysql>select*frommysql.userwhereuser='test'\G;

***************************1.row***************************

Host:%

User:test

Password:*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29

Select_priv:Y

Insert_priv:Y

Update_priv:N

Delete_priv:N

Create_priv:N

Drop_priv:N

Reload_priv:N

Shutdown_priv:N

Process_priv:N

File_priv:N

Grant_priv:N

References_priv:N

Index_priv:N

Alter_priv:N

Show_db_priv:N

Super_priv:N

Create_tmp_table_priv:N

Lock_tables_priv:N

Execute_priv:N

Repl_slave_priv:N

Repl_client_priv:N

Create_view_priv:N

Show_view_priv:N

Create_routine_priv:N

Alter_routine_priv:N

Create_user_priv:N

Event_priv:N

Trigger_priv:N

Create_tablespace_priv:N

ssl_type:

ssl_cipher:

x509_issuer:

x509_subject:

max_questions:0

max_updates:0

max_connections:0

max_user_connections:0

plugin:mysql_native_password

authentication_string:

password_expired:N

1rowinset(0.04sec)

ERROR:

Noqueryspecified

mysql>

2：那么我们来创建一个测试账号test，授予数据库层级的权限。如下所示：

mysql>dropusertest;

QueryOK,0rowsaffected(0.00sec)

mysql>grantselect,insert,update,deleteonMyDB.*totest@'%'identifiedby'test';

QueryOK,0rowsaffected(0.01sec)

mysql>

mysql>select*frommysql.userwhereuser='test'\G;--可以看到无任何授权。

mysql>select*frommysql.dbwhereuser='test'\G;

***************************1.row***************************

Host:%

Db:MyDB

User:test

Select_priv:Y

Insert_priv:Y

Update_priv:Y

Delete_priv:Y

Create_priv:N

Drop_priv:N

Grant_priv:N

References_priv:N

Index_priv:N

Alter_priv:N

Create_tmp_table_priv:N

Lock_tables_priv:N

Create_view_priv:N

Show_view_priv:N

Create_routine_priv:N

Alter_routine_priv:N

Execute_priv:N

Event_priv:N

Trigger_priv:N

1rowinset(0.04sec)

ERROR:

Noqueryspecified

mysql>

mysql>showgrantsfortest;

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

|Grantsfortest@%|

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

|GRANTUSAGEON*.*TO'test'@'%'IDENTIFIEDBYPASSWORD'*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29'|

|GRANTSELECT,INSERT,UPDATE,DELETEON`MyDB`.*TO'test'@'%'|

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

2rowsinset(0.00sec)

mysql>

3：那么我们来创建一个测试账号test，授予表层级的权限。如下所示：

mysql>dropusertest;

QueryOK,0rowsaffected(0.00sec)

mysql>flushprivileges;

QueryOK,0rowsaffected(0.00sec)

mysql>grantallonMyDB.kkktotest@'%'identifiedby'test';

QueryOK,0rowsaffected(0.01sec)

mysql>

mysql>showgrantsfortest;

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

|Grantsfortest@%|

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

|GRANTUSAGEON*.*TO'test'@'%'IDENTIFIEDBYPASSWORD'*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29'|

|GRANTALLPRIVILEGESON`MyDB`.`kkk`TO'test'@'%'|

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

2rowsinset(0.00sec)

mysql>select*frommysql.tables_priv\G;

***************************1.row***************************

Host:%

Db:MyDB

User:test

Table_name:kkk

Grantor:root@localhost

Timestamp:0000-00-0000:00:00

Table_priv:Select,Insert,Update,Delete,Create,Drop,References,Index,Alter,CreateView,Showview,Trigger

Column_priv:

1rowinset(0.01sec)

ERROR:

Noqueryspecified

mysql>

4：那么我们来创建一个测试账号test，授予列层级的权限。如下所示：

mysql>dropusertest;

QueryOK,0rowsaffected(0.00sec)

mysql>flushprivileges;

QueryOK,0rowsaffected(0.00sec)

mysql>grantselect(id,col1)onMyDB.TEST1totest@'%'identifiedby'test';

QueryOK,0rowsaffected(0.01sec)

mysql>flushprivileges;

QueryOK,0rowsaffected(0.00sec)

mysql>

mysql>select*frommysql.columns_priv;

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

|Host|Db|User|Table_name|Column_name|Timestamp|Column_priv|

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

|%|MyDB|test|TEST1|id|0000-00-0000:00:00|Select|

|%|MyDB|test|TEST1|col1|0000-00-0000:00:00|Select|

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

2rowsinset(0.00sec)

mysql>showgrantsfortest;

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

|Grantsfortest@%|

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

|GRANTUSAGEON*.*TO'test'@'%'IDENTIFIEDBYPASSWORD'*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29'|

|GRANTSELECT(id,col1)ON`MyDB`.`TEST1`TO'test'@'%'|

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

2rowsinset(0.00sec)

mysql>

5：那么我们来创建一个测试账号test，授子程序层级的权限。如下所示：

mysql>DROPPROCEDUREIFEXISTSPRC_TEST;

QueryOK,0rowsaffected(0.00sec)

mysql>DELIMITER//

mysql>CREATEPROCEDUREPRC_TEST()

->BEGIN

->SELECT*FROMkkk;

->END//

QueryOK,0rowsaffected(0.00sec)

mysql>DELIMITER;

mysql>grantexecuteonprocedureMyDB.PRC_TESTtotest@'%'identifiedby'test';

QueryOK,0rowsaffected(0.01sec)

mysql>flushprivileges;

QueryOK,0rowsaffected(0.00sec)

mysql>

mysql>showgrantsfortest;

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

|Grantsfortest@%|

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

|GRANTUSAGEON*.*TO'test'@'%'IDENTIFIEDBYPASSWORD'*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29'|

|GRANTEXECUTEONPROCEDURE`MyDB`.`prc_test`TO'test'@'%'|

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

2rowsinset(0.00sec)

mysql>select*frommysql.procs_privwhereUser='test';

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

|Host|Db|User|Routine_name|Routine_type|Grantor|Proc_priv|Timestamp|

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

|%|MyDB|test|PRC_TEST|PROCEDURE|root@localhost|Execute|0000-00-0000:00:00|

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

1rowinset(0.00sec)

mysql>

所以，如果需要查看用户被授予的权限，就需要从这五个层级来查看被授予的权限。从上到下或从小到上，逐一检查各个层级被授予的权限。

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航