This reminds me of how there is zero authorization for `NOTIFY` in PostgreSQL. IMO there should at least be the option to `CREATE CHANNEL ...` and then use `GR

This reminds me of how there is zero authorization for `NOTIFY` in PostgreSQL. IMO there should at least be the option to `CREATE CHANNEL ...` and then use `GRANT` to indicate who can `NOTIFY`. In practice this is not a big problem because usually one grants very few users direct access to a PG DB.