From: Madison Kelly <linux@alteeve.com>
To: pgsql-performance@postgresql.org
Cc: Bruno Wolff III <bruno@wolff.to>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Subject: Re: Index ot being used
Date: Sun, 12 Jun 2005 23:42:05 -0400
Message-ID: <42AD008D.4080600@alteeve.com> (raw)
In-Reply-To: <20050613031317.GA18988@wolff.to>
References: <1825.216.209.137.1.1118419819.squirrel@mail.alteeve.com>
<20050610155535.GO8451@tobias.nordicbet.com>
<42AC42CB.8050703@alteeve.com>
<24636.1118591783@sss.pgh.pa.us>
<42ACBC95.9020404@alteeve.com>
<20050613030001.GB17491@wolff.to>
<20050613031317.GA18988@wolff.to>
Bruno Wolff III wrote:
> On Sun, Jun 12, 2005 at 22:00:01 -0500,
> Bruno Wolff III <bruno@wolff.to> wrote:
>
>>On Sun, Jun 12, 2005 at 18:52:05 -0400,
>> Madison Kelly <linux@alteeve.com> wrote:
>>
>>> After sending that email I kept plucking away and in the course of
>>>doing so decided that I didn't need to return the 'file_type' column.
>>>Other than that, it would see my query now matches what you two have
>>>recommended in the 'ORDER BY...' front but I still can't get an index
>>>search.
>>
>>No it doesn't. Even if you don't return file_type you still need it
>>in the order by clause if you want postgres to consider using your
>>index.
>
>
> I didn't notice that you had changed the index. The reason this index
> doesn't help is that you can't use it to select on records with the
> desired file_type.
As you probably saw in my last reply, I went back to the old index and
tried the query you and Tom Lane recommended. Should this not have
caught the index?
At any rate, I am re-reading the documents on indexing for 7.4.x on
postgresql.org... This is kind of flustering. Thanks again though for
som much help!
Madison
--
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Madison Kelly (Digimer)
TLE-BU, The Linux Experience; Back Up
http://tle-bu.thelinuxexperience.com
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To: pgsql-performance@postgresql.org
Cc: linux@alteeve.com, bruno@wolff.to, tgl@sss.pgh.pa.us
Subject: Re: Index ot being used
In-Reply-To: <42AD008D.4080600@alteeve.com>
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