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Re: Numeric 508 datatype

From: Andreas Pflug <pgadmin(at)pse-consulting(dot)de>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Andrew Dunstan <andrew(at)dunslane(dot)net>, "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-patches(at)postgresql(dot)org
Subject: Re: Numeric 508 datatype
Date: 2005-11-18 11:11:09
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Lists: pgsql-generalpgsql-hackerspgsql-patches
Tom Lane wrote:
> Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
>>However, I don't think we can promise never to change the ondisk 
>>representation of data, nor the page layout. Sometimes an inplace 
>>upgrade just won't work, ISTM.
> We have talked about batching on-disk changes so that they'd only occur
> once every few release cycles.  But until we have a pg_upgrade, there is
> no reason to adopt such a policy.

IMHO such a policy is a _prerequisite_ for somebody to come up 
implementing pg_upgrade. Why spend time on pg_upgrade if there's no 
policy to support it?


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