Re: wCTE behaviour
От | David Fetter |
---|---|
Тема | Re: wCTE behaviour |
Дата | |
Msg-id | 20101111164133.GE19270@fetter.org обсуждение исходный текст |
Ответ на | wCTE behaviour (Marko Tiikkaja <marko.tiikkaja@cs.helsinki.fi>) |
Ответы |
Re: wCTE behaviour
|
Список | 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@fetter.org> http://fetter.org/ Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter Skype: davidfetter XMPP: david.fetter@gmail.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
В списке pgsql-hackers по дате отправления: