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Question about HeapTupleHeaderData

From: Federico <rotellaro(at)gmail(dot)com>
To: pgsql-admin(at)postgresql(dot)org
Subject: Question about HeapTupleHeaderData
Date: 2007-05-24 08:56:21
Message-ID: a3e8e2210705240156g3171d634uba713af4b7ef0678@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-admin
Hi,
I'm writing some papers about PostgreSQL physical storage and I'm
bumping into the  HeapTupleHeaderData layout as descripted here
http://www.postgresql.org/docs/8.2/static/storage-page-layout.html

Reading the source code in src/include/access/htup.h I got a question.

The t_cmin and t_cmax stores the insert and delete CID stamps.
the CID (command that operate on item id?) is similar to XID? where I
can find some docs about CID and its meaning?

Thank you very much in advance.
Regards
Federico
-- 
Federico Campoli is:
@ PGDay -> Committee, http://www.pgday.it
@ PLUG -> Consigliere, http://www.prato.linux.it
PostgreSQL Consulting  -> PGHost http://www.pghost.eu

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