I have just upgraded PostgreSQL from 9.1 to 9.2 on Ubuntu 12.04 (OpenERP v7). I used this guide:
https://wiki.postgresql.org/wiki/Using_pg_upgrade_on_Ubuntu/Debian#Upgrading_to_version_9.2_or_later
and it seemed to work properly. I now have a separate 9.2 directory in /etc/postgresql along with the 9.1 directory.
My question is how do I configure OpenERP to use a particular version of PostgreSQL?
Bill.