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Security for Hive

I have just started learning about hive.
I have configured Hive to use mysql as the metastore instead of derby.
If I wish to use GRANT and REVOKE commands, i can use it with any user. A
user can issue GRANT or REVOKE commands to any other users' table since
both the users' tables are present in the same warehouse.

Isn't there a concept of superuser/admin in hive who alone has the
authority to issue these commands ?

Any answer is greatly appreciated!

Thanks and Regards,
                Sachin Sudarshana