Re: [BUG] Logical replication failure "ERROR: could not map filenode "base/13237/442428" to relation OID" with catalog modifying txns

On Mon, Jul 18, 2022 at 8:49 PM Amit Kapila <amit.kapila16@gmail.com> wrote:
>
> On Sun, Jul 17, 2022 at 6:29 PM Masahiko Sawada <sawada.mshk@gmail.com> wrote:
> >
> > On Fri, Jul 15, 2022 at 3:32 PM shiy.fnst@fujitsu.com
> > <shiy.fnst@fujitsu.com> wrote:
> > >
> >
> > I've attached patches for all supported branches including the master.
> >
>
> For back branch patches,
> * Wouldn't it be better to move purge logic into the function
> SnapBuildPurge* function for the sake of consistency?

Agreed.

> * Do we really need ReorderBufferInitialXactsSetCatalogChanges()?
> Can't we instead have a function similar to
> SnapBuildXidHasCatalogChanges() as we have for the master branch? That
> will avoid calling it when the snapshot
> state is SNAPBUILD_START or SNAPBUILD_BUILDING_SNAPSHOT

Seems a good idea. We would need to pass the information about
(parsed->xinfo & XACT_XINFO_HAS_INVALS) to the function but probably
we can change ReorderBufferXidHasCatalogChanges() so that it checks
the RBTXN_HAS_CATALOG_CHANGES flag and then the initial running xacts
array.

BTW on backbranches, I think that the reason why we add
initial_running_xacts stuff to ReorderBuffer is that we cannot modify
SnapBuild that could be serialized. Can we add a (private) array for
the initial running xacts in snapbuild.c instead of adding new
variables to ReorderBuffer? That way, the code would become more
consistent with the changes on the master branch.

Regards,

--
Masahiko Sawada
EDB:  https://www.enterprisedb.com/