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From: aoki@cs.berkeley.edu (Paul M. Aoki)
To: Giles Nelson <Giles.Nelson@cl.cam.ac.uk>
Cc: postgres@postgres.Berkeley.EDU
Subject: Re: time travel 
Reply-To: aoki@cs.berkeley.edu (Paul M. Aoki)
In-reply-to: Your message of Wed, 09 Nov 1994 13:57:59 +0000 
	     <"swan.cl.cam.:198030:941109135811"@cl.cam.ac.uk> 
Date: Wed, 09 Nov 94 10:50:36 -0800
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Giles Nelson <Giles.Nelson@cl.cam.ac.uk> writes:
> I would like to use the built-in facilities that POSTGRES has for
> time travel but I wish to time stamp each instance with an `event
> time', that is the time which is associated with the instance
> itself, such as a birth date.
> 
> My impression is that this is not possible and I will have to use a
> time attribute within a relation.

correct, the built-in time-travel syntax only works for transaction
commit time, and you cannot change the commit timestamp.  the time
*types* are general but the syntax is not.
--
  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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