Re: Add 64-bit XIDs into PostgreSQL 15

From: Corey Huinker <corey(dot)huinker(at)gmail(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Peter Geoghegan <pg(at)bowt(dot)ie>, Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>, Maxim Orlov <orlovmg(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Add 64-bit XIDs into PostgreSQL 15
Date: 2022-01-07 23:36:11
Message-ID: CADkLM=cGS8T+hf+EKF+_yWKHrcJkgz99iurkN8Srco39xFA55Q@mail.gmail.com
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>
> I'd be
> curious to know where we found the bits for that -- the tuple header
> isn't exactly replete with extra bit space.
>

+1 - and can we somehow shoehorn in a version # into the new format so we
never have to look for spare bits again.

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