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annotate tests/sql_if.ur @ 1886:b7cd3c7c7edd

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Interpret 'table' signature items more flexibly, automatically adding (Ur) constraints to support a kind of subtyping over (SQL) constraint sets
author Adam Chlipala <adam@chlipala.net>
date Mon, 04 Nov 2013 15:14:23 -0500
parents 34364e383bed
children
rev   line source
adam@1573 1 table t : { A : int, B : int }
adam@1573 2
adam@1573 3 fun main () =
adam@1573 4 x <- queryX (SELECT * FROM t WHERE IF t.A = 6 THEN t.B < 2 ELSE t.B > 5)
adam@1573 5 (fn r => <xml><li>{[r.T.A]}, {[r.T.B]}</li></xml>);
adam@1573 6 return <xml><body>{x}</body></xml>