Re: [PATCH] Support automatic sequence replication

On Wed, Feb 11, 2026 at 9:21 AM shveta malik <shveta.malik@gmail.com> wrote:
>
> > Additionally, the existing ALTER SUBSCRIPTION … REFRESH SEQUENCES
> > command should be enhanced so that it can be executed on disabled
> > subscriptions and perform sequence synchronization independently,
> > without relying on the sequence sync worker. Supporting execution on a
> > disabled subscription is necessary because, if REFRESH SEQUENCES is
> > run while the subscription is enabled, the apply worker may start
> > immediately, ingest new transactions, and advance the replication
> > slot's LSN beyond the point at which sequences were last synchronized
> > again.
> >
> > Note: This approach may conservatively report that sequences need to
> > be synchronized even when no sequence values have actually changed.
> > This limitation is inherent to the design, as during an upgrade we
> > don't connect to the publisher and decode WAL between the two LSNs to
> > determine whether any sequence changes actually occurred.
> >
>
> I like the idea. In particular, I like the approach of providing a
> REFRESH SEQUENCE command to the user. Even if we don’t implement the
> check during the upgrade process, we can clearly document that users
> should verify sequence drift before upgrading. If any sequence drift
> is detected, they should run REFRESH-SEQ manually.
>

Yeah, implementing such checks are not required in upgrade but it is
better to document the use of this command in upgrade context.

-- 
With Regards,
Amit Kapila.