user has grant options.  The <code class="command">REVOKE ALL
    PRIVILEGES</code> forms will issue a warning message if no grant options are
    held, while the other forms will issue a warning if grant options for
    any of the privileges specifically named in the command are not held.
    (In principle these statements apply to the object owner as well, but
    since the owner is always treated as holding all grant options, the
    cases can never occur.)
   </p><p>
    If a superuser chooses to issue 