Re: The PostgreSQL C Dialect

From: John Naylor <johncnaylorls(at)gmail(dot)com>
To: Christophe Pettus <xof(at)thebuild(dot)com>
Cc: pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Re: The PostgreSQL C Dialect
Date: 2026-06-23 03:32:49
Message-ID: CANWCAZZJxgDAUsBK-1CctczwTz2TVo3TzjhhSD7fAA9EWte3eA@mail.gmail.com
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On Tue, Jun 23, 2026 at 2:39 AM Christophe Pettus <xof(at)thebuild(dot)com> wrote:
>
> When I was writing my first PostgreSQL extension, I was at sea on a lot of the conventions that make up the "PostgreSQL C Dialect." I've taken my notes, added some additional things that confused me, and put it up on the wiki for review:
>
> https://wiki.postgresql.org/wiki/The_PostgreSQL_C_Dialect
>
> Feedback welcome, of course!

Cool work! Minor comments:

Size, Index - These are not common, and I think they are actually
discouraged now, in favor of the more common size_t and uint32. I'm
not sure if there's a consensus on that, though.

C99 -> we started requiring C11 during the dev cycle of the PG19, and
it doesn't seem to early to mention that. The part about C99 features
we don't allow are still accurate, I believe.

--
John Naylor
Amazon Web Services

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