> This is a relevant project: https://github.com/agentm/project-m36 Thanks -- I didn't know about that one. I'll add it to my list. It's quite unlike other implementations. I have some reading to do. Regards David M Bennett FACS Andl - A New Database Language - andl.org -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general