Re: Add last commit LSN to pg_last_committed_xact()

From: Andres Freund <andres(at)anarazel(dot)de>
To: James Coleman <jtc331(at)gmail(dot)com>
Cc: Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Add last commit LSN to pg_last_committed_xact()
Date: 2022-01-29 00:47:19
Message-ID: 20220129004719.ucfd5cfnnx7flaih@alap3.anarazel.de
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On 2022-01-28 16:36:32 -0800, Andres Freund wrote:
> On 2022-01-28 18:43:57 -0500, James Coleman wrote:
> > Alternatively I see pg_attribute_aligned, but that's not defined
> > (AFAICT) on clang, for example, so I'm not sure that'd be acceptable?
>
> clang should have it (it defines __GNUC__). The problem would be msvc, I
> think. Not sure if there's a way to get to a common way of defining it between
> gcc-like compilers and msvc (the rest is niche enough that we don't need to
> care about the efficiency I think).

Seems like it's doable:

https://godbolt.org/z/3c5573bTW

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