Hey, So I wrote this blog entry on some testing I was doing yesterday: http://www.commandprompt.com/blogs/joshua_drake/2009/01/fk_check_enum_or_domain_that_is_the_question/ I was wondering what other folks on this list experiences with the various options were? Joshua D. Drake -- PostgreSQL - XMPP: jdrake(at)jabber(dot)postgresql(dot)org Consulting, Development, Support, Training 503-667-4564 - http://www.commandprompt.com/ The PostgreSQL Company, serving since 1997