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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Richard Yen <dba@richyen.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: query plan with index having a btrim is different for strings of different length
Date: Wed, 10 Dec 2008 15:04:54 -0500
Message-ID: <6449.1228939494@sss.pgh.pa.us> (raw)
In-Reply-To: <E8AE9590-4E30-49C0-B11F-D7131009A095@richyen.com>
References: <751F49DC-1142-4E9C-95C8-BC3C229B3F0B@richyen.com>
	<22937.1228865243@sss.pgh.pa.us>
	<E8AE9590-4E30-49C0-B11F-D7131009A095@richyen.com>

BTW, if your queries typically constrain both lastname and firstname,
it'd likely be worthwhile to make a 2-column index on
	lower(btrim(x_lastname)), lower(btrim(x_firstname))

			regards, tom lane

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