Re: pgstat include expansion

From: Andres Freund <andres(at)anarazel(dot)de>
To: Alvaro Herrera <alvherre(at)kurilemu(dot)de>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>
Cc: pgsql-hackers(at)postgresql(dot)org, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>
Subject: Re: pgstat include expansion
Date: 2026-02-26 15:14:37
Message-ID: 55orfweo3sys7g5vstb3ufv7es2fxyi2tj7rrfwn4okasay5hw@eiktf4jpwnnz
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Hi,

Thanks for pushing the pgstat.h slimdown patch - I should have gotten to that
... but didn't.

On 2026-02-26 14:52:10 +0100, Alvaro Herrera wrote:
> This one removes wait_event.h from pgstat.h. The only difference from
> the previous one, aside from the fact that I had to add pgstat.h to a
> few more .c files, is that xlogreader.c needs to include it inside the
> #ifndef FRONTEND; otherwise, "ninja -t missingdeps" complain about the
> file being used in pg_rewind and pg_waldump (seen in CI).

I'm somewhat worried about the amount of breakage this will cause in
extensions. Many extensions use something like
WaitLatch(wait_event_info = WAIT_EVENT_EXTENSION)
and many of them won't have included wait_event.h.

OTOH, Heikki's interrupt patch will already cause widespread breakage in just
such code, so maybe this is the time to do it.

Greetings,

Andres Freund

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