Dear Takahashi-san, Thanks for giving feedbacks!
> > I don't know if it requires the kind of code you are thinking but I > > agree that it is worth considering implementing it as an extension. > > I think the other advantage to implement as an extension is that users could > install the extension to older Postgres. > > As mentioned in previous email, the one use case of n-way replication is > migration > from older Postgres to newer Postgres. > > If we implement as an extension, users could use n-way replication for > migration > from PG10 to PG16. > I think even if LRG is implemented as contrib modules or any extensions, it will deeply depend on the subscription option "origin" proposed in [1]. So LRG cannot be used for older version, only PG16 or later. [1]: https://www.postgresql.org/message-id/caldanm3pt1cpeb3y9pe7ff91gzvpnxr91y4ztwiw6h+gayg...@mail.gmail.com Best Regards, Hayato Kuroda FUJITSU LIMITED
