Re: proposal - reglanguage type

ne 1. 3. 2020 v 19:31 odesílatel Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> napsal:

> Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
> > I miss a reglanguage type from our set of reg* types.
>
> I'm skeptical about this. I don't think we want to wind up with a reg*
> type for every system catalog, so there needs to be some rule about which
> ones it's worth the trouble for. The original idea was to provide a reg*
> type if the lookup rule would be anything more complicated than "select
> oid from <catalog> where name = 'foo'". We went beyond that with
> regnamespace and regrole, but I think there was a sufficient argument of
> usefulness for those two. I don't see that reglanguage has enough of
> a use-case.
>

the use-case is probably only one - filtering pg_proc. Probably the most
common filter is

prolang = (SELECT oid
FROM pg_language
WHERE lanname = 'plpgsql')

It's little bit not comfortable so for namespace we can do pronamespace <>
'pg_catalog'::regnamespace and there is nothing for language.

This feature is interesting for people who write code in plpgsql, or who
migrate from PL/SQL (and for people who use plpgsql_check).

All mass check (mass usage of plpgsql_check) have to use filter on prolang.

Regards

Pavel

>
> regards, tom lane
>