"xqzhang" <zxq230104(at)163(dot)com> writes:
> Description: After granting all select privelges on view to user, who
> still can not select the view
You have a fundamental misconception about how that works. The
privilege checks for each view are applied with respect to the owner
of that view, not the current session user. So for example u3 needs
access to v2, not u4.
regards, tom lane