Re: Numeric 508 datatype - Mailing list pgsql-patches

From Andreas Pflug
Subject Re: Numeric 508 datatype
Date
Msg-id 437DB6CD.20601@pse-consulting.de
Whole thread Raw
In response to Re: Numeric 508 datatype  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: Numeric 508 datatype  (Alvaro Herrera <alvherre@commandprompt.com>)
List pgsql-patches
Tom Lane wrote:
> Andrew Dunstan <andrew@dunslane.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?

Regards,
Andreas

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