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Re: Does Lower make indexes useless?

From: Kris Jurka <books(at)ejurka(dot)com>
To: Clemens Eisserer <linuxhippy(at)gmail(dot)com>
Cc: pgsql-jdbc(at)postgresql(dot)org
Subject: Re: Does Lower make indexes useless?
Date: 2006-05-05 17:54:32
Message-ID: Pine.BSO.4.63.0605051249080.13150@leary2.csoft.net (view raw or flat)
Thread:
Lists: pgsql-jdbc

On Fri, 5 May 2006, Clemens Eisserer wrote:

> I am using queries very often which look like "... WHERE
> LOWER(field)='..';" to allow case-insensitive search on varchar
> columns.
>
> Does this make indexes useless or are there algorythmns which allow
> using indexes even in this case?
> Are there ways how this could be done in a better way?
>

This question has nothing to do with Java or JDBC, so this isn't the right 
list.  You should try -novice or -general.

http://www.postgresql.org/docs/8.1/static/indexes-expressional.html

Kris Jurka

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