adamc@243: table t1 : {A : int, B : string, C : float}
adamc@243: table t2 : {A : float, D : int}
adamc@243: 
adamc@243: datatype list a = Nil | Cons of a * list a
adamc@243: 
adamc@243: val q1 = (SELECT * FROM t1)
adamc@243: val r1 : transaction (list {A : int, B : string, C : float}) =
adamc@243:         query q1
adamc@243:         (fn fs _ acc => return (Cons (fs.T1, acc)))
adamc@243:         Nil
adamc@243: 
adamc@243: val r2 : transaction int =
adamc@243:         ls <- r1;
adamc@243:         return (case ls of
adamc@243:                     Nil => 0
adamc@243:                   | Cons ({A = a, ...}, _) => a)