Thank you, alter table pref_users add constraint pref_users_medals_check check (medals >= 0); has worked! I do not use pgAdmin, because I see in the logs of my 2 web server, that attackers look for it all the time. But I'll install it at my development VM at home now. Regards Alex -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
