| From: | David Fetter <david(at)fetter(dot)org> |
|---|---|
| To: | Marko Tiikkaja <marko(dot)tiikkaja(at)cs(dot)helsinki(dot)fi> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: wCTE behaviour |
| Date: | 2010-11-11 16:41:33 |
| Message-ID: | 20101111164133.GE19270@fetter.org |
| Views: | Whole Thread | Raw Message | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Thu, Nov 11, 2010 at 04:15:34AM +0200, Marko Tiikkaja wrote:
> Hi all,
>
> The discussion around wCTE during the last week or so has brought to
> my attention that we don't actually have a consensus on how exactly
> wCTEs should behave. The question seems to be whether or not a
> statement should see the modifications of statements ran before it.
> While I think making the modifications visible would be a lot more
> intuitive, it's not clear how we'd optimize the execution in the
> future without changing the behaviour (triggers are a big concern).
+1 for letting writeable CTEs see the results of previous CTEs, just
as current non-writeable ones do. A lot of the useful cases for this
feature depend on this visibility.
Cheers,
David.
--
David Fetter <david(at)fetter(dot)org> http://fetter.org/
Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter
Skype: davidfetter XMPP: david(dot)fetter(at)gmail(dot)com
iCal: webcal://www.tripit.com/feed/ical/people/david74/tripit.ics
Remember to vote!
Consider donating to Postgres: http://www.postgresql.org/about/donate
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Mark Cave-Ayland | 2010-11-11 16:43:22 | Re: improved parallel make support |
| Previous Message | Andrew Dunstan | 2010-11-11 16:13:17 | Re: renaming contrib. (was multi-platform, multi-locale regression tests) |