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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Matt Mello <alien@spaceship.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: "deadlock detected" documentation
Date: Thu, 15 May 2003 13:13:44 -0400
Message-ID: <10286.1053018824@sss.pgh.pa.us> (raw)
In-Reply-To: <3EC3C77A.3010006@spaceship.com>
References: <3EB82DA1.7020809@spaceship.com>
	<24809.1052282819@sss.pgh.pa.us>
	<3EC32935.5040005@spaceship.com>
	<7737.1053003625@sss.pgh.pa.us>
	<3EC3C239.7070708@spaceship.com>
	<10096.1053017383@sss.pgh.pa.us>
	<3EC3C77A.3010006@spaceship.com>

Matt Mello <alien@spaceship.com> writes:
> I see.  One item I forgot to mention ...  Both update statements have a 
> where clause containing txn.terminalid=38.  Txn.terminalid is a foreign 
> key column in that table (txn.terminalid->terminal.terminalid).  Could 
> this be the source of the trouble?

Not per se.  The problem depends on which rows get updated and in what
sequence --- the contents of the WHERE clause aren't the issue, except
insofar as they determine the set of rows to be updated.

			regards, tom lane



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