Aren't they both just the observer pattern? Seems like it falls into the same category as every other "should I implement this in the DB or app land" code. Als

Aren't they both just the observer pattern? Seems like it falls into the same category as every other "should I implement this in the DB or app land" code. Also, moving your callbacks to the db means you can call into the db from multiple code bases without fear of replicating the callbacks inconsistently. That said, I'm not aware of many people who rely on that functionality.