It does take some extra work, but I've implemented this using trigger functions. There is questions and various ways to solve it on stackoverflow [1]: [1] - ht

It does take some extra work, but I've implemented this using trigger functions. There is questions and various ways to solve it on stackoverflow [1]: [1] - http://stackoverflow.com/q/1109061/1646663 http://stackoverflow.com/q/1109061/1646663