Re: [HACKERS] WIP: New Page API

Markus Wanner napsal(a):
> Hi,
>
> Zdenek Kotala wrote:
>> I finished first prototype of new page API.
>
> This might seem obvious to you, but could you please describe the
> problem you are trying to solve with this new page API? How does it
> relate to the relation forks, that have just been committed?
>

Hi Markus,

It is not related to fork maps. The idea is to learn PostgreSQL process to read
old data page structures. It is part of in-place upgrade and it was discussed on
PGCon this year. You can see more info on

http://wiki.postgresql.org/wiki/In-place_upgrade
http://www.pgcon.org/2008/schedule/events/87.en.html

This is prototype of first part. Multi versions tuple processing and tuple size
limits are next part.

Zdenek

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