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To: emilu@encs.concordia.ca
cc: pgsql-sql@postgresql.org
Subject: Re: trim(both) problem? 
In-reply-to: <4812402D.7080404@encs.concordia.ca> 
References: <4812402D.7080404@encs.concordia.ca>
Comments: In-reply-to Emi Lu <emilu@encs.concordia.ca>
	message dated "Fri, 25 Apr 2008 16:33:49 -0400"
Date: Fri, 25 Apr 2008 16:44:30 -0400
Message-ID: <28797.1209156270@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>
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Emi Lu <emilu@encs.concordia.ca> writes:
>   select trim(both '<BR/>' from '<BR/>ROI Engineering Inc.');
>          btrim
> ---------------------
>   OI Engineering Inc.
> (1 row)

> "R" is missing? How?

The first argument of trim is a set, not a sequence --- it means trim
any characters belonging to this set.

			regards, tom lane