Re: Handle infinite recursion in logical replication setup

On Mon, Jul 18, 2022 at 10:23 AM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>
> On Sat, Jul 16, 2022 at 10:29 AM Dilip Kumar <dilipbalaut(at)gmail(dot)com> wrote:
> >
> > I think giving two options would be really confusing from the
> > usability perspective. I think what we should be doing here is to
> > keep these three names 'none', 'any' and 'local' as reserved names for
> > the origin name so that those are not allowed to be set by the user
> > and they have some internal meaning.
> >
>
> This makes sense to me. I think we can avoid reserving 'local' for now
> till we agree on its use case and implementation. One similar point
> about slots is that we treat 'none' slot_name in subscription commands
> as a special value indicating no slot name whereas we do allow
> creating a slot with the name 'none' with
> pg_create_logical_replication_slot(). So, if we want to follow a
> similar convention here, we may not need to add any restriction for
> origin names but personally, I think it is better to add such a
> restriction to avoid confusion and in fact, as a separate patch we
> should even disallow creating slot name as 'none'.

I have made changes to disallow the name "any" and "none" in
pg_replication_origin_create. The attached v34 patch has the changes
for the same. I will post a separate patch to disallow creation of
slots with names as 'none' separately later.

Regards,
Vignesh