Mercurial > urweb
diff tests/relops.ur @ 260:645d0e8da643
Monoize relops
author | Adam Chlipala <adamc@hcoop.net> |
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date | Sun, 31 Aug 2008 15:47:32 -0400 |
parents | 71bafe66dbe1 |
children | e933297c4e24 |
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--- a/tests/relops.ur Sun Aug 31 15:36:15 2008 -0400 +++ b/tests/relops.ur Sun Aug 31 15:47:32 2008 -0400 @@ -7,4 +7,24 @@ INTERSECT SELECT t1.B, t1.A FROM t1 WHERE t1.B = t1.B) val q3 = (SELECT t1.A, t1.B, t1.C FROM t1 WHERE t1.A = 0 INTERSECT SELECT * FROM t1 WHERE t1.B = 'Hello world!' - EXCEPT SELECT * FROM t1 WHERE t1.A < t1.A) + EXCEPT SELECT * FROM t1 WHERE t1.A < t1.A + UNION SELECT * FROM t1 WHERE t1.A > t1.A) + +datatype list a = Nil | Cons of a * list a + +val r1 : transaction (list {A : int, B : string, C : float}) = + query q3 + (fn fs acc => return (Cons (fs.T1, acc))) + Nil + +val r2 : transaction string = + ls <- r1; + return (case ls of + Nil => "Problem" + | Cons ({B = b, ...}, _) => b) + +val main : unit -> transaction page = fn () => + s <- r2; + return <html><body> + {cdata s} + </body></html>