On Mon, 2025-04-07 at 12:16 +0200, Willy-Bas Loos wrote: > My question is not so much about "can i drop a certain replication slot", > more about "does this publication still have any replication slots?". > Or, if you will: "what's the publication for this replication slot?". > > I've double checked the views that you suggested, and I found that I can relate > the WAL sender processes to replication slots through pg_replication_slots.active_pid . > I've also looked into replication origins. > > But I can't find a link to the publication. And that's what I need to know.
I don't think that there is a connection between a publication and a replication slot. That connection is only made when a subscriber connects and runs the START_REPLICATION command [1] and specifies the "pgoutput" plugin with the "publication_names" option [2].
I don't think you can see that information reflected in a system view on the primary. You'd have to query "pg_subscription" on the standby.
