Mercurial > urweb
view tests/relops.ur @ 2174:ce312cad5ecd
Use correct OpenSSL thread safety macros on OS X (closes #209)
Create an Autoconf test to determine if pthread_t is a pointer or scalar
type, and use the appropriate CRYPTO_THREADID_set macro based on the
result.
author | Benjamin Barenblat <bbaren at mit.edu> |
---|---|
date | Sun, 20 Sep 2015 17:46:07 -0400 |
parents | e933297c4e24 |
children |
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table t1 : {A : int, B : string, C : float} table t2 : {A : float, D : int} val q1 = (SELECT * FROM t1 UNION SELECT * FROM t1) val q2 = (SELECT t1.A, t1.B FROM t1 WHERE t1.A = 0 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 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 <xml><body> {cdata s} </body></xml>