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Monoize transaction identifiers; improve disjointness prover on irreducible folds; change 'query' type
author Adam Chlipala <adamc@hcoop.net>
date Sun, 31 Aug 2008 10:36:54 -0400
parents b6b75e6e0898
children 7f6620853c36
rev   line source
adamc@243 1 table t1 : {A : int, B : string, C : float}
adamc@243 2 table t2 : {A : float, D : int}
adamc@243 3
adamc@243 4 datatype list a = Nil | Cons of a * list a
adamc@243 5
adamc@243 6 val q1 = (SELECT * FROM t1)
adamc@243 7 val r1 : transaction (list {A : int, B : string, C : float}) =
adamc@243 8 query q1
adamc@251 9 (fn fs acc => return (Cons (fs.T1, acc)))
adamc@243 10 Nil
adamc@243 11
adamc@249 12 val r2 : transaction string =
adamc@243 13 ls <- r1;
adamc@243 14 return (case ls of
adamc@249 15 Nil => "Problem"
adamc@249 16 | Cons ({B = b, ...}, _) => b)
adamc@249 17
adamc@249 18 val main : unit -> transaction page = fn () =>
adamc@249 19 s <- r2;
adamc@249 20 return <html><body>
adamc@249 21 {cdata s}
adamc@249 22 </body></html>