Consider Two input parameter Category and Products(Both are util.collection) For Product i have query:select Product_name from products where ($X{IN,Category_name ,Category}) Product I/P controls works fine for 'All' or any particluar category i select. But on selection of 'NONE' i am getting all the values of products for all categories instead it must not show any products in list. Any pointer related to these could help? Thanking You Regards Gaurav