From: Tom Lane <tgl@sss.pgh.pa.us>
To: Steinar H. Gunderson <sgunderson@bigfoot.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Materializing a sequential scan
Date: Thu, 20 Oct 2005 00:58:51 -0400
Message-ID: <4452.1129784331@sss.pgh.pa.us> (raw)
In-Reply-To: <20051019174544.GA32303@samfundet.no>
References: <20051019174544.GA32303@samfundet.no>
"Steinar H. Gunderson" <sgunderson@bigfoot.com> writes:
> BEGIN
> INSERT INTO kortsys2.mdb_gruppekobling_temp
> SELECT overgruppe_id,undergruppe_id FROM gruppekobling gk
> JOIN gruppe g1 ON gk.overgruppe_id=g1.gruppe_id
> JOIN gruppe g2 ON gk.overgruppe_id=g2.gruppe_id
> WHERE g1.aktiv AND g2.aktiv;
> LOOP
BTW, it sure looks like that second JOIN ought to be
JOIN gruppe g2 ON gk.undergruppe_id=g2.gruppe_id
As-is, it's not doing anything for you ... certainly not enforcing
that the undergruppe_id be aktiv.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, sgunderson@bigfoot.com
Subject: Re: Materializing a sequential scan
In-Reply-To: <4452.1129784331@sss.pgh.pa.us>
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