[GENERAL] Question about the WITH RECURSIVE patch

Hi, I tried the 8.4-devel version and the CTE (Common Table Expression -WITH RECURSIVE ) patch is working pretty good. I just have a question These are the queries their plan . The first query uses RECURSIVE keyword (and has a recursive and non-recursive term as CTE) while the second query uses

Re: [GENERAL] Question about the WITH RECURSIVE patch

Josh Harrison [EMAIL PROTECTED] writes: My question is when I don't use the Recursive term does the optimizer just consider it as a subquery or does it work like Oracle's WITH CLAUSE (Subquery Factoring) ? Oracle's WITH CLAUSE boosts the performance of the queries. So does this do the same?

Re: [GENERAL] Question about the WITH RECURSIVE patch

On Nov 20, 2008, at 1:21 PM, Tom Lane wrote: See the fine manual, for instance last para here: http://developer.postgresql.org/pgdocs/postgres/queries-with.html Fine manual indeed... this the best explanation of WITH RECURSIVE I've ever read. Kudos to the documentation writer(s). -- Sent

Re: [GENERAL] Question about the WITH RECURSIVE patch

Thanks Tom. This is wonderful On Thu, Nov 20, 2008 at 4:21 PM, Tom Lane [EMAIL PROTECTED] wrote: Josh Harrison [EMAIL PROTECTED] writes: My question is when I don't use the Recursive term does the optimizer just consider it as a subquery or does it work like Oracle's WITH CLAUSE

Re: [GENERAL] Question about the WITH RECURSIVE patch

Tom Lane wrote on 20.11.2008 22:21: Josh Harrison [EMAIL PROTECTED] writes: My question is when I don't use the Recursive term does the optimizer just consider it as a subquery or does it work like Oracle's WITH CLAUSE (Subquery Factoring) ? Oracle's WITH CLAUSE boosts the performance of the

Re: [GENERAL] Question about the WITH RECURSIVE patch

Thomas Kellerer wrote: Tom Lane wrote on 20.11.2008 22:21: Josh Harrison [EMAIL PROTECTED] writes: My question is when I don't use the Recursive term does the optimizer just consider it as a subquery or does it work like Oracle's WITH CLAUSE (Subquery Factoring) ? Oracle's WITH CLAUSE

Re: [GENERAL] Question about the WITH RECURSIVE patch

Bruce Momjian wrote on 20.11.2008 22:56: From http://umitanuki.net/pgsql/wfv08/design.html I got the impression that windowing functions will make into (at least partially) into 8.4 because on that page several items are marked with [DONE]. I can't see anything in the developer docs regarding

Re: [GENERAL] Question about the WITH RECURSIVE patch

Thomas Kellerer wrote: Bruce Momjian wrote on 20.11.2008 22:56: From http://umitanuki.net/pgsql/wfv08/design.html I got the impression that windowing functions will make into (at least partially) into 8.4 because on that page several items are marked with [DONE]. I can't see