Re: Proposal: SET ROLE hook

On 2015-10-16 10:30:20 -0700, Joe Conway wrote:
> On 10/16/2015 09:28 AM, Andres Freund wrote:
> > Alternatively you can just have a elevate_user() function that does the
> > logging and escalating? That seems like the same amount of code and it'd
> > work with released versions of postgres?
> >
> > Sure, that has some disadvantages over your approach, but for the
> > presented use case with humans needing to escalate I don't see any.
>
> Hmmm, do you mean essentially skip the "GRANT postgres to joe" and use a
> SECURITY DEFINER C function that does the set role to postgres under the
> covers with "GRANT EXECUTE on FUNCTION elevate_user() to joe"?

Yes.

> Being able to use something like that on existing versions would be
> very nice, but it feels kind of grotty.

Hm. To me it doesn't feel too bad - security definer functions are there
to allow to do things that users would normally not be allowed to do...

Greetings,

Andres Freund