RE: pg_createsubscriber does not check output_plugin_libraries

Dear Fujii-san,

> I'm not sure if we have a clear policy on what --dry-run should check.
> Personally, I'd like it to check as many prerequisites as practical.

Yes, same here.

> TBH, the code for checking output_plugin_libraries seems to be getting
> more complicated than I initially expected. But, from my view, it hasn't
> become complicated and difficult enough to justify leaving the check out,
> at least *for now*.

OK, so let's keep working on the patch set. Patches in [1] are still valid.
We can consider again after the patch will be a committable shape.

> > To confirm, is it allowed to add such a verification in back branches?
> > I imagined running something like below after connecting to the publisher.
>
> Adding such verification would be useful, but it looks like an improvement
> rather than a bug fix to me. So, I don't think we can add it to the stable
> branches. Thoughts?

OK, so let's drop the idea for now.

[1]: https://www.postgresql.org/message-id/OS9PR01MB12149E6DB23FD6B53CCC64403F5B02%40OS9PR01MB12149.jpnprd01.prod.outlook.com

Best regards,
Hayato Kuroda
FUJITSU LIMITED