From: Guillaume Lelarge <guillaume@lelarge.info>
To: Edward W. Rouse <erouse@comsquared.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: ignore case in where clause
Date: Thu, 22 Mar 2012 21:38:42 +0100
Message-ID: <1332448722.2339.10.camel@localhost.localdomain> (raw)
In-Reply-To: <06fe01cd086a$04681ce0$0d3856a0$@com>
References: <06fe01cd086a$04681ce0$0d3856a0$@com>
On Thu, 2012-03-22 at 16:26 -0400, Edward W. Rouse wrote:
> I am currently using lower(column) = '' for matching case insensitive. I
> know that there are ways to do this with regular expressions too. I recently
> noticed that including even one lower causes severe performance issues (from
> 290ms to over 80Kms).
>
Probably because it cannot use the index anymore. Try creating an index
on lower(column), and see if it helps.
--
Guillaume
http://blog.guillaume.lelarge.infohttp://www.dalibo.com
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To: pgsql-sql@postgresql.org
Cc: guillaume@lelarge.info, erouse@comsquared.com
Subject: Re: ignore case in where clause
In-Reply-To: <1332448722.2339.10.camel@localhost.localdomain>
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