Re: [BUG] "FailedAssertion" reported when streaming in logical replication

On Tue, Apr 27, 2021 at 12:55 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>
> On Tue, Apr 27, 2021 at 12:22 PM Dilip Kumar <dilipbalaut(at)gmail(dot)com> wrote:
> >
> > On Tue, Apr 27, 2021 at 12:05 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> > > > > Can't we use 'txns_by_base_snapshot_lsn' list for this purpose? It is
> > > > > ensured in ReorderBufferSetBaseSnapshot that we always assign
> > > > > base_snapshot to a top-level transaction if the current is a known
> > > > > subxact. I think that will be true because we always form xid-subxid
> > > > > relation before processing each record in
> > > > > LogicalDecodingProcessRecord.
> > > >
> > > > Yeah, we can do that, but here we are only interested in top
> > > > transactions and this list will give us sub-transaction as well so we
> > > > will have to skip it in the below if condition.
> > > >
> > >
> > > I am not so sure about this point. I have explained above why I think
> > > there won't be any subtransactions in this. Can you please let me know
> > > what am I missing if anything?
> >
> > Got your point, yeah this will only have top transactions so we can
> > use this. I will change this in the next patch. In fact we can put
> > an assert that it should not be an sub transaction?
> >
>
> Right. It is good to have an assert.

I have modified the patch based on the above comments.

--
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com