<para>

A user can only revoke privileges that were granted directly by

that user. If, for example, user A has granted a privilege with

grant option to user B, and user B has inturned granted it to user

grant option to user B, and user B has inturn granted it to user

C, then user A cannot revoke the privilege directly from C.

Instead, user A could revoke the grant option from user B and use

the <literal>CASCADE</literal> option so that the privilege is