Alvaro Herrera <alvhe...@commandprompt.com> writes: > Bruce Momjian wrote: >> So the problem is that our DELETE ... USING does not allow ANSI join >> syntax? Can that be added?
> Not sure about that. USING is already an extension to the standard, so > if we extend it a bit more, it can't be a problem, can it? I don't see any very good way to extend the USING syntax to allow the target table to be outer-joined to something else. Some other systems allow it by letting you re-specify the target in the other clause, equivalently to DELETE FROM target t USING t LEFT JOIN other_table ot ON ... but we have always considered that the target is *not* to be identified with any member of the FROM/USING clause, so it would be a serious compatibility break to change that now. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers