In the doc I read it's possible to use 'opaque' as rtype in sql functions, but when I try to create a sql function with return opaque I got the message 'ProcedureCreate : sql functions cannot return type "opaque"...
When I declare tye function as 'plpgsql' return opaque is ok, but on exec I got the message "Invalid TypeIdTypeRelId - oid -0"
I use Pg 7.0.2 with redhat 6.1.
