Re: Allow GUC settings in CREATE SUBSCRIPTION CONNECTION to take effect

On Thu, Nov 27, 2025 at 2:37 AM Kirill Reshke <reshkekirill(at)gmail(dot)com> wrote:
> Looking at v3 raises two questions for me.
>
> First is if we should have a doc notion of which variables ought to be
> set to what.

Are you suggesting that we document which GUC parameters should be set,
and to what values, for logical replication? We already have a section on this
in logical-replication.sgml. Is that sufficient?

> Second, how do we actually test that subscription connection options
> are applied on the subscriber side? Can we have TAP for this (is is
> worth the troubles)?

+1 on adding a test. One idea is to enable log_replication_commands via
the CONNECTION option and then check that the publisher’s log contains
the message "received replication command: IDENTIFY_SYSTEM".
There may be a cleaner way to test this, though.

Regards,

--
Fujii Masao