-- Create empty tables. 
CREATE TABLE article(id int);
CREATE TABLE article_2(id int);

-- Create subscription that will initiate the table sync
CREATE SUBSCRIPTION mysub CONNECTION
'dbname=postgres host=localhost user=rep password=Password port=5432' PUBLICATION mypub;

-- While the sync is going on, change the publication of the
-- subscription in a subtransaction, so that it adds up the synchronization
-- workers for the earlier publication into the 'on_commit_stop_workers' list
select pg_sleep(1);
begin;
savepoint a;
ALTER SUBSCRIPTION mysub SET PUBLICATION mypub_2;
rollback to a;
-- Commit will stop the above sync.
commit;