How to grant select on information_schema

[Justin Xu]

Hi,
I want to grant select on DB in formation_schema to an user, but got the below error. How to grant select privilege on all tables of information_schema to an user ?

mysql> grant select on information_schema.* to 'mytest'@'%' identified by 'test1234';
--------------
grant select on information_schema.* to 'mytest'@'%' identified by 'test1234'
--------------

ERROR 1044 (42000): Access denied for user 'root'@'127.0.0.1' to database 'information_schema'


mysql> show grants for root;
--------------
show grants for root
--------------

+--------------------------------------------------------------------------------------------------------------+
| Grants for root@% |
+--------------------------------------------------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY PASSWORD '*D50CDD8864D10CA3204A886A4BA20DD3C87BACCA' |
+--------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)