Re: Question about change in page/tuple header (v4)

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Zdenek Kotala <Zdenek(dot)Kotala(at)Sun(dot)COM>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Question about change in page/tuple header (v4)
Date: 2007-08-14 14:26:24
Message-ID: 19168.1187101584@sss.pgh.pa.us
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Zdenek Kotala <Zdenek(dot)Kotala(at)Sun(dot)COM> writes:
> 2) HASOID has been moved in infomask and original place is unused. Is
> there some reason for that?

To keep it next to the other bits that are about tuple content rather
than transactional behavior.

> This change little bit complicate tuple
> header upgrade. If there is not real reason to have it in current place,
> I recommend to move it back.

There are enough other changes there that you're going to have to
manipulate the infomask anyway.

regards, tom lane

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