Re: index in desc order

From: Sergey Konoplev <gray(dot)ru(at)gmail(dot)com>
To: AI Rumman <rummandba(at)gmail(dot)com>
Cc: Szymon Guz <mabewlun(at)gmail(dot)com>, pgsql-general General <pgsql-general(at)postgresql(dot)org>
Subject: Re: index in desc order
Date: 2010-11-02 10:07:59
Message-ID: AANLkTim-SrPX8ETVxjZFRrXAUevuf0wnXRnpDPfDBLVB@mail.gmail.com
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On 2 November 2010 12:57, AI Rumman <rummandba(at)gmail(dot)com> wrote:
> But I am using Postgresql 8.1. Is it possible here?

I am afraid not. You could try to do the index using kind of 1/field
trick but I am not sure if it performs better than backward index scan
in general.

>
> On Tue, Nov 2, 2010 at 3:42 PM, Szymon Guz <mabewlun(at)gmail(dot)com> wrote:
>>
>>
>> On 2 November 2010 10:36, AI Rumman <rummandba(at)gmail(dot)com> wrote:
>>>
>>> Is it possible to create an index in descending order?
>>
>> yes...
>> create index i on t(i desc);
>>
>> regards
>> Szymon
>

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Sergey Konoplev

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