Re: let's make the list of reportable GUCs configurable (was Re: Add %r substitution for psql prompts to show recovery status)

Robert Haas <robertmhaas@gmail.com> writes:
> 3. I'm not sure that just ignoring any GUCs we don't find is the right
> thing.  I'm also not sure that it's the wrong thing, but it might be.
> My question is: what if there's an extension-owned GUC in play? The
> library probably isn't even loaded at this stage, unless it's in
> shared_preload_libraries.

Gut reaction is that define_custom_variable would need to consult
the list to see if a newly-defined variable should be marked GUC_REPORT.

Therefore, at least for qualified GUC names, we can't issue an error
for unrecognized names.  But maybe it should complain about unrecognized
unqualified names.

            regards, tom lane