Re: pg_settings.unit and DefineCustomXXXVariable

On Wed, 8 Jan 2025 at 11:13, Luca Ferrari <fluca1978@gmail.com> wrote:
>
> Hi all,
> I need to define a few GUCs, and for that purpose I'm using
> DefineCustomXXXVariable functions that provide hooks for assignment,
> show and check. However it is not clear to me if it is possible to
> populate the unit column in pg_settings for the custom defined
> variables, and if so, how.

DefineCustomXXXVariable has a 'flags' argument, into which GUC_UNIT_*
can be or-ed.
AFAIK, the options provided in guc.h are the only kinds of units
supported and available, and I think only integer variables actually
support the unit conversion implied by the unit options.

Kind regards,

Matthias van de Meent