Have you looked at the SE-Postgres work? Probably not exactly what you need, but there might be something there. http://www.postgresql.org/docs/devel/static/se

Have you looked at the SE-Postgres work? Probably not exactly what you need, but there might be something there. http://www.postgresql.org/docs/devel/static/sepgsql.html http://www.postgresql.org/docs/devel/static/sepgsql.html