# File lib/og/connection.rb, line 87
        def update_properties(update_sql, obj_or_oid, klass = nil)
                oid = obj_or_oid.to_i
                klass = obj_or_oid.class unless klass
                
                exec "UPDATE #{klass::DBTABLE} SET #{update_sql} WHERE oid=#{oid}"
        end