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annotate tests/view.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 8688e01ae469
children
rev   line source
adamc@754 1 table t : { A : int, B : string }
adamc@754 2
adamc@754 3 view v = SELECT t.A AS X FROM t
adamc@754 4
adamc@754 5 fun main () =
adamc@754 6 rows <- queryX (SELECT * FROM v)
adamc@754 7 (fn r => <xml><li>{[r.V.X]}</li></xml>);
adamc@754 8 return <xml><body>
adamc@754 9 {rows}
adamc@754 10 </body></xml>