From: | Klint Gore <kg(at)kgb(dot)une(dot)edu(dot)au> |
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To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | pgsql-bugs(at)postgresql(dot)org, Kevin Grittner <kevin(dot)grittner(at)wicourts(dot)gov> |
Subject: | Re: BUG #1916: selection criteria from one outer join on clause applied to other joins |
Date: | 2005-09-28 05:36:05 |
Message-ID: | 433A2BC51ED.6406KG@129.180.47.120 |
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Lists: | pgsql-bugs |
On Wed, 28 Sep 2005 00:34:37 -0400, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> "Kevin Grittner" <kevin(dot)grittner(at)wicourts(dot)gov> writes:
> > Obviously, adding an outer join to a query which is already returning rows
> > should never reduce the number of rows returned.
>
> I think this is a case of overenthusiastic propagation of implied
> equalities. Do you know offhand if it fails in 8.0.* or earlier
> branches?
fails on 7.4.7 (rh9) and 8.0.0 (win) for me.
klint.
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