Extended SHOW GRANTS Extended SHOW GRANTS¶
In Oracle MySQL SHOW GRANTS displays only the privileges granted
explicitly to the named account. Other privileges might be available
to the account, but they are not displayed. For example, if an
anonymous account exists, the named account might be able to use its
privileges, but SHOW GRANTS will not display them. Percona Server for MySQL offers the SHOW EFFECTIVE GRANTS command to display
all the effectively available privileges to the account, including
those granted to a different account.
Example¶
If we create the following users:
mysql> CREATE USER grantee@localhost IDENTIFIED BY 'grantee1';
Query OK, 0 rows affected (0.50 sec)
mysql> CREATE USER grantee IDENTIFIED BY 'grantee2';
Query OK, 0 rows affected (0.09 sec)
mysql> CREATE DATABASE db2;
Query OK, 1 row affected (0.20 sec)
mysql> GRANT ALL PRIVILEGES ON db2.* TO grantee WITH GRANT OPTION;
Query OK, 0 rows affected (0.12 sec)
SHOW EFFECTIVE GRANTSoutput before the change:
mysql> SHOW EFFECTIVE GRANTS;
+----------------------------------------------------------------------------------------------------------------+
| Grants for grantee@localhost |
+----------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'grantee'@'localhost' IDENTIFIED BY PASSWORD '*9823FF338D44DAF02422CF24DD1F879FB4F6B232' |
+----------------------------------------------------------------------------------------------------------------+
1 row in set (0.04 sec)
Although the grant for the db2 database isn’t shown, grantee user has enough privileges to create the table in that database:
user@trusty:~$ mysql -ugrantee -pgrantee1 -h localhost
mysql> CREATE TABLE db2.t1(a int);
Query OK, 0 rows affected (1.21 sec)
- The output of
SHOW EFFECTIVE GRANTSafter the change shows all the privileges for thegranteeuser:
mysql> SHOW EFFECTIVE GRANTS;
+----------------------------------------------------------------------------------------------------------------+
| Grants for grantee@localhost |
+----------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'grantee'@'localhost' IDENTIFIED BY PASSWORD '*9823FF338D44DAF02422CF24DD1F879FB4F6B232' |
| GRANT ALL PRIVILEGES ON `db2`.* TO 'grantee'@'%' WITH GRANT OPTION |
+----------------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)
Version-Specific Information¶
8.0.12-1: Feature ported from Percona Server for MySQL 5.7.
