Re: pg_createsubscriber --dry-run logging concerns

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От Álvaro Herrera
Тема Re: pg_createsubscriber --dry-run logging concerns
Дата
Msg-id 202510011031.6emshjc2co4s@alvherre.pgsql
обсуждение исходный текст
Ответ на Re: pg_createsubscriber --dry-run logging concerns  (Peter Smith <smithpb2250@gmail.com>)
Ответы Re: pg_createsubscriber --dry-run logging concerns
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On 2025-Oct-01, Peter Smith wrote:

> (code below may not work; it's just for illustrative purposes)
> 
> #define pg_log_info_checkdry(...) do {\
>   if (dry_run)\
>     pg_log_generic(PG_LOG_INFO, PG_LOG_PRIMARY, "[dry-run NOP]" __VA_ARGS__);\
>   else;\
>     pg_log_generic(PG_LOG_INFO, PG_LOG_PRIMARY, __VA_ARGS__);\
>   } while (0);

I like this kind of idea best.  However I think it might be better to do
it the other way around: have the normal pg_log_info() check dry_run,
and have a special one for the messages that are to be identical in
either mode.  I'm not sure how difficult this is to implement, though.

pg_subscriber is not the only program with a dry-run mode; it looks like
pg_archiveclean, pg_combinebackup, pg_resetwal, pg_rewind have one.  Is
it worth maybe doing something at the common/logging.c level rather than
specifically pg_createsubscriber?

-- 
Álvaro Herrera        Breisgau, Deutschland  —  https://www.EnterpriseDB.com/
[…] indem ich in meinem Leben oft an euch gedacht, euch glücklich zu machen. Seyd es!
A menudo he pensado en vosotros, en haceros felices. ¡Sedlo, pues!
        Heiligenstädter Testament, L. v. Beethoven, 1802
        https://de.wikisource.org/wiki/Heiligenstädter_Testament



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