Mercurial > urweb
view tests/where.ur @ 556:5703a2ad5221
.urp files
author | Adam Chlipala <adamc@hcoop.net> |
---|---|
date | Tue, 09 Dec 2008 11:52:56 -0500 |
parents | 8bb46d87b074 |
children |
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table t1 : {A : int, B : string, C : float} table t2 : {A : float, D : int} val q1 = (SELECT * FROM t1) val q2 = (SELECT * FROM t1 WHERE TRUE) val q3 = (SELECT * FROM t1 WHERE FALSE) val q4 = (SELECT * FROM t1 WHERE {True}) val q5 = (SELECT * FROM t1 WHERE {1} = {1}) val q6 = (SELECT * FROM t1 WHERE {"Hi"} < {"Bye"}) val q7 = (SELECT * FROM t1 WHERE {1} = {1} AND NOT ({"Hi"} <= {"Bye"})) val q8 = (SELECT * FROM t1 WHERE t1.A = 1 OR t1.C < 3.0) datatype list a = Nil | Cons of a * list a val r1 : transaction (list {A : int, B : string, C : float}) = query q7 (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>