Re: BUG #2303: UPDATE from manual is incorrect

"Massimo Fidanza" <malix0@gmail.com> writes:
> The query is the last but one

> UPDATE employees SET last_closed_deal = deal.id
>     FROM accounts JOIN deals ON (account.id = deal.account_id)
>     WHERE deal.employee_id = employees.id
>     AND deal.name = 'Rocket Powered Skates'
>     AND accounts.name = 'Acme Corporation'
>     ORDER BY deal.signed_date DESC LIMIT 1;

> this query is not correct and doesn't work with postgresql 8.1.

It still works, if you enable add_missing_from.  But I agree that the
example shouldn't assume that.

> My query that doesn't work is the first and I modify it in second form that
> is the correct one.

That appears to be an entirely unrelated issue, which is whether
aggregates in the SET list of an UPDATE make any sense.  I'm inclined
to think not --- what are you aggregating over?

            regards, tom lane