Re: Add contrib/pg_logicalsnapinspect

On Thu, Aug 29, 2024 at 6:33 PM Bharath Rupireddy
<bharath(dot)rupireddyforpostgres(at)gmail(dot)com> wrote:
>
> On Thu, Aug 29, 2024 at 3:44 PM Bertrand Drouvot
> <bertranddrouvot(dot)pg(at)gmail(dot)com> wrote:
> >
> > Yeah that's fair. And now I'm wondering if we need an extra module. I think
> > we could "simply" expose 2 new functions in core, thoughts?
> >
> > > > What do you think? Did you have something else in mind?
> > > >
> > >
> > > On similar lines, we can also provide a function to get the slot's
> > > on-disk data.
> >
> > Yeah, having a way to expose the data from the disk makes fully sense to me.
> >
> > > IIRC, Bharath had previously proposed a tool to achieve
> > > the same. It is fine if we don't want to add that as part of this
> > > patch but I mentioned it because by having that we can have a set of
> > > functions to view logical decoding data.
> >
> > That's right. I think this one would be simply enough to expose one or two
> > functions in core too (and probably would not need an extra module).
>
> +1 for functions in core unless this extra module
> pg_logicalsnapinspect works as a tool to be helpful even when the
> server is down.
>

We have an example of pageinspect which provides low-level functions
to aid debugging. The proposal for these APIs also seems to fall in
the same category, so why go for the core for these functions?

--
With Regards,
Amit Kapila.