From: Scott Marlowe <smarlowe@g2switchworks.com>
To: Tim Jones <TJones@optio.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: joining two tables slow due to sequential scan
Date: Fri, 10 Feb 2006 16:36:52 -0600
Message-ID: <1139611012.22740.147.camel@state.g2switchworks.com> (raw)
In-Reply-To: <47668A1334CDBF46927C1A0DFEB223D3131315@mail.optiosoftware.com>
References: <47668A1334CDBF46927C1A0DFEB223D3131315@mail.optiosoftware.com>
On Fri, 2006-02-10 at 16:35, Tim Jones wrote:
> OK. I'm gonna make a couple of guesses here:
>
> 1: clinicaldocuments.patientidentifier is an int8 and you're running
> 7.4 or before.
>
> -- nope int4 and 8.1
>
> 2: There are more rows with clinicaldocuments.patientidentifier= 123
> than with documentversions.documentstatus = 'AC'.
>
> -- nope generally speaking all statuses are 'AC'
>
> 3: documentversions.documentidentifier and
> clinicaldocuments.dssdocumentidentifier are not the same type.
>
> -- nope both int4
OK then, I guess we'll need to see the explain analyze output of both of
those queries.
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To: pgsql-performance@postgresql.org
Cc: smarlowe@g2switchworks.com, TJones@optio.com
Subject: Re: joining two tables slow due to sequential scan
In-Reply-To: <1139611012.22740.147.camel@state.g2switchworks.com>
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