The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/10/sql-createsubscription.html Description:
This page: https://www.postgresql.org/account/comments/new/10/sql-createsubscription.html/ explains that the CREATE SUBSCRIPTION command would hang if you tried to create a subscription for a publication in the same cluter, and gives some instructions to work around this limitation. It would be nice to have an example for that (great learning tool..)