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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
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table t : { A : int, B : string }

view v = SELECT t.A AS X FROM t

fun main () =
    rows <- queryX (SELECT * FROM v)
            (fn r => <xml><li>{[r.V.X]}</li></xml>);
    return <xml><body>
      {rows}
    </body></xml>