| From: | "Josh Harrison" <joshques(at)gmail(dot)com> |
|---|---|
| To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | "General postgres mailing list" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Question about the WITH RECURSIVE patch |
| Date: | 2008-11-20 21:33:16 |
| Message-ID: | 8d89ea1d0811201333i564d208n50c3dc286547b076@mail.gmail.com |
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| Thread: | |
| Lists: | pgsql-general |
Thanks Tom. This is wonderful
On Thu, Nov 20, 2008 at 4:21 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> "Josh Harrison" <joshques(at)gmail(dot)com> 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?
>
> See the fine manual, for instance last para here:
> http://developer.postgresql.org/pgdocs/postgres/queries-with.html
>
> regards, tom lane
>
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