Drain pineapple into a small bowl, reserve liquid. Slice bananas into bowl of reserved pineapple juice for a few minutes. In a large bowl, mix condensed milk, cherry pie filling and drained pineapple. Mix well. Fold in whipped topping, mixing well. Drain banana slices from pineapple juice and add to cherry mixture. Fold in banana slices gently until mixed well. Place mixture into container with a lid; top with chopped pecans. I use a 3 quart pyrex dish with a lid OR place in 2 smaller containers. Either place in the freezer or refrigerator. It can be served as a chilled or frozen dish.