I noticed that the PG docs [1] for the catalog pg_subscription doesn't have any mention of the substream column.
Accidental omission by commit 4648243 [2] from last year? ---- [1] https://www.postgresql.org/docs/devel/catalog-pg-subscription.html [2] https://github.com/postgres/postgres/commit/464824323e57dc4b397e8b05854d779908b55304 Kind Regards, Peter Smith. Fujitsu Australia