Re: Request for new column in pg_namespace

Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
> ne 15. 12. 2024 v 17:59 odesílatel Ron Johnson <ronljohnsonjr(at)gmail(dot)com>
> napsal:
>> A new boolean column named "indissystem" that's true only for system
>> relations would make *many* maintenance queries cleaner, since they'd
>> look like:
>> select ...

> oid of all system objects is less then 0x4000

That wouldn't help for excluding temp schemas, and it's not totally
trustworthy for information_schema either.

But I think the real problem with Ron's proposal is that it presumes
there is a one-size-fits-all notion of "system schema". As a
counterexample, for some maintenance activities (such as vacuuming)
you might wish to process pg_catalog.

What I'd suggest as an improvement that could be implemented
immediately is to wrap the checks in a user-defined function
like "is_system_schema(nspname name)".

regards, tom lane