Guy Rouillier <guyr-ml1(at)burntmail(dot)com> writes:
> I set that up, and using the SHOW command returns the set value. I
> searched the archives and I couldn't identify a way to retrieve these
> values in a trigger function.
http://www.postgresql.org/docs/8.2/static/functions-admin.html#FUNCTIONS-ADMIN-SET-TABLE
regards, tom lane