The current user must either be a superuser, the owner of the table, or a user with a GRANT option for the table.
Also, bear in mind that you can't revoke rights from a user who is a superuser.
The current user must either be a superuser, the owner of the table, or a user with a GRANT option for the table.
Also, bear in mind that you can't revoke rights from a user who is a superuser.