At Fri, 4 Mar 2022 10:09:19 +0900, Michael Paquier <michael@paquier.xyz> wrote in
> On Thu, Mar 03, 2022 at 04:40:42PM -0500, Tom Lane wrote:
> > The point is to make it clear that the macro isn't intended to affect
> > code outside the function. Since C lacks block-scoped macros,
> > there's no other way to do that.
> >
> > I concede that a lot of our code is pretty sloppy about this, but
> > that doesn't make it a good practice.
>
> Well, if we change that, better to do that in all the places where
> this would be affected, but I am not sure to see a style appealing
> enough on this thread.
>
> From what I can see, history shows that the style of using a #define
> for the number of columns originates from da2c1b8, aka 9.0. Its use
> inside a function originates from a755ea3 as of 9.1 and then it has
> just spread around without any undefs, so it looks like people like
> that way of doing things.
I'm one of them. Not unliking #undef, though.
It seems to me the name "PG_STOP_BACKUP_V2_COLS" alone is specific
enough for the purpose of avoiding misuse.
regards.
--
Kyotaro Horiguchi
NTT Open Source Software Center
