On Mon, 22 Aug 2022 at 12:16, Bharath Rupireddy < bharath.rupireddyforpostg...@gmail.com> wrote:
> On Mon, Aug 22, 2022 at 11:59 AM Natarajan R <nataraj3...@gmail.com> > wrote: > > > > Hi All, > > > > I am writing a postgres extension which writes only generic wal record, > but this wal is not recognized by logical replication decoder. I have a > basic understanding of how logical replication(COPY command for initial > sync, wal replica for final sync) works, can you please tell us a way to > support this? > > "Generic" resource manager doesn't have a decoding API, see [1], which > means that the generic WAL records will not get decoded. > > Can you be more specific about the use-case? Why use only "Generic" > type WAL records? Why not use "LogicalMessage" type WAL records if you > want your WAL records to be decoded? > > I am writing an extension which implements postgres table access method interface[1] with master-slave architecture, with the help of doc[1] i decided to go with generic_wal to achieve crash_safety and also for streaming replication. It seems like generic_wal couldn't help with logical replication.. But, I don't have knowledge on "LogicalMessage" Resource Manager, need to explore about it. [1] https://www.postgresql.org/docs/current/tableam.html
