| From: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
|---|---|
| To: | Tomas Vondra <tomas(dot)vondra(at)enterprisedb(dot)com> |
| Cc: | Petr Jelinek <petr(dot)jelinek(at)enterprisedb(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Euler Taveira <euler(at)eulerto(dot)com>, Greg Nancarrow <gregn4422(at)gmail(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, Rahila Syed <rahilasyed90(at)gmail(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>, Önder Kalacı <onderkalaci(at)gmail(dot)com>, japin <japinli(at)hotmail(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, David Steele <david(at)pgmasters(dot)net>, Craig Ringer <craig(at)2ndquadrant(dot)com>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Amit Langote <amitlangote09(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: row filtering for logical replication |
| Date: | 2021-07-14 09:38:15 |
| Message-ID: | CAA4eK1+k0X86pOvX1VjAZxrySsAQWijkRYLmoeLmdzSbSeODoA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Jul 14, 2021 at 12:45 AM Tomas Vondra
<tomas(dot)vondra(at)enterprisedb(dot)com> wrote:
>
> On 7/13/21 12:57 PM, Amit Kapila wrote:
> > On Tue, Jul 13, 2021 at 10:24 AM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>
> > I think the problem described by Petr[1] is also possible today if the
> > user drops the publication and there is a corresponding subscription,
> > basically, the system will stuck with error: "ERROR: publication
> > "mypub" does not exist. I think allowing to use non-historic snapshots
> > just for publications will resolve that problem as well.
> >
> > [1] - https://www.postgresql.org/message-id/92e5587d-28b8-5849-2374-5ca3863256f1%402ndquadrant.com
> >
>
> That seems like a completely different problem, TBH. For example the
> slot is dropped too, which means the WAL is likely gone etc.
>
I think if we can use WAL archive (if available) and re-create the
slot, the system should move but recreating the publication won't
allow the system to move.
--
With Regards,
Amit Kapila.
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