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From: aoki@cs.berkeley.edu (Paul M. Aoki)
To: Mike Doughney <mike@ss1.digex.net>
Cc: postgres@postgres.Berkeley.EDU
Subject: Re: "Non-functional update" bogus notice problems 
Reply-To: aoki@cs.berkeley.edu (Paul M. Aoki)
In-reply-to: Your message of Thu, 9 Feb 1995 17:45:02 -0500 
	     <199502092245.AA11024@ss1.digex.net> 
Date: Thu, 09 Feb 95 22:05:43 -0800
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Mike Doughney <mike@ss1.digex.net> writes:
> The message is spurious in that subsequent inspection of the classes
> shows that the replacements did take effect (the update was
> 'functional').

non-functional update doesn't mean that an update did not occur.  it
just means that an attempt was made to update a row that had already
been updated in that transaction.  rows can be "revisited" due to
(e.g.)  interactions between the update process and index traversal.
--
  Paul M. Aoki          |  University of California at Berkeley
  aoki@CS.Berkeley.EDU  |  Dept. of EECS, Computer Science Division (#1776) 
                        |  Berkeley, CA 94720-1776

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