| From: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
|---|---|
| To: | Peter Smith <smithpb2250(at)gmail(dot)com> |
| Cc: | "Jonathan S(dot) Katz" <jkatz(at)postgresql(dot)org>, vignesh C <vignesh21(at)gmail(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, "kuroda(dot)hayato(at)fujitsu(dot)com" <kuroda(dot)hayato(at)fujitsu(dot)com>, "shiy(dot)fnst(at)fujitsu(dot)com" <shiy(dot)fnst(at)fujitsu(dot)com> |
| Subject: | Re: Handle infinite recursion in logical replication setup |
| Date: | 2022-07-26 03:42:23 |
| Message-ID: | CAA4eK1+exPVkzKiQaxzF6DdqG7bTyN_3Hr+G=p0As=AvDWiWVA@mail.gmail.com |
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On Tue, Jul 26, 2022 at 7:48 AM Peter Smith <smithpb2250(at)gmail(dot)com> wrote:
>
> On Tue, Jul 26, 2022 at 11:43 AM Jonathan S. Katz <jkatz(at)postgresql(dot)org> wrote:
> >
> ...
> > That said, this introduces a new restriction for this particular
> > scenario that doesn't exist on other scenarios. Instead, I would
> > advocate we document how to correctly set up the two-way replication
> > scenario (which we have a draft!), document the warnings around the
> > conflicts, perhaps include Vignesh's instructions on how to remediate a
> > conflict on initial sync, and consider throwing a WARNING as you suggested.
> >
> > Thoughts?
>
> Perhaps a WARNING can be useful if the SUBSCRIPTION was created with
> enabled=false because then the user still has a chance to reconsider,
>
Agreed. I think but in that case, when the user enables it, we need to
ensure that we won't allow replicating (during initial sync) remote
data. If this is really required/preferred, it can be done as a
separate enhancement.
--
With Regards,
Amit Kapila.
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