Re: Rewrite, normal execution vs. EXPLAIN ANALYZE
От | Alvaro Herrera |
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Тема | Re: Rewrite, normal execution vs. EXPLAIN ANALYZE |
Дата | |
Msg-id | 1279923490-sup-7068@alvh.no-ip.org обсуждение исходный текст |
Ответ на | Re: Rewrite, normal execution vs. EXPLAIN ANALYZE (Marko Tiikkaja <marko.tiikkaja@cs.helsinki.fi>) |
Ответы |
Re: Rewrite, normal execution vs. EXPLAIN ANALYZE
Re: Rewrite, normal execution vs. EXPLAIN ANALYZE Re: Rewrite, normal execution vs. EXPLAIN ANALYZE |
Список | pgsql-hackers |
Excerpts from Marko Tiikkaja's message of vie jul 23 17:44:21 -0400 2010: > On 7/24/10 12:37 AM +0300, Alvaro Herrera wrote: > > Excerpts from Marko Tiikkaja's message of vie jul 23 14:13:18 -0400 2010: > > I don't think it's fair game to change the behavior of multiple-output > > rules at this point. However, I also think that it's unwise to base > > wCTEs on the behavior of rules -- rules are widely considered broken and > > unusable for nontrivial cases. > > I don't want to change the behaviour either, but we have two different > behaviours right now. We need to change at least the other. It seems like it's EXPLAIN ANALYZE that needs fixing. > wCTEs are not going to be based on any of the broken behaviour of rules, > that's for sure. What I meant is expanding a single query into multiple > queries and running the executor separately for all of them. Is a wCTE going to be expanded into multiple queries? If not, it sounds like we're all agreed.
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