Type-Level Privileges You can revoke two privileges on data types: The Usage privilege on a user-defined data type The Under privilege on a named ROW type Type-Level Privileges 1 USAGE ON TYPE type_name 1 UNDER ON TYPE row_type Element Description Restrictions Syntax row_type Named ROW type for which to revoke Under privilege Must exist Data Type, p. Data Type type_name User-defined type for which to revoke Usage privilege Must exist Data Type, p. Data Type