| From: | David Fetter <david(at)fetter(dot)org> |
|---|---|
| To: | Marko Tiikkaja <marko(dot)tiikkaja(at)cs(dot)helsinki(dot)fi> |
| Cc: | Hitoshi Harada <umi(dot)tanuki(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Yeb Havinga <yebhavinga(at)gmail(dot)com> |
| Subject: | Re: wCTE behaviour |
| Date: | 2010-11-14 21:38:36 |
| Message-ID: | 20101114213836.GA6729@fetter.org |
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| Lists: | pgsql-hackers |
On Sun, Nov 14, 2010 at 08:07:22PM +0200, Marko Tiikkaja wrote:
> On 2010-11-14 8:01 PM +0200, I wrote:
> >In my opinion, all of these should have the same effect: DELETE all rows
> >from "foo".
>
> Since the example wasn't entirely clear on this one: in my opinion
> the DML should also only be executed once. So:
>
> WITH t AS (INSERT INTO foo VALUES (0) RETURNING *)
> SELECT 1 FROM t t1, t t2;
>
> would only insert one row in any case.
Right :)
Cheers,
David.
--
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