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Tag NULLs with their types in SQL, to help the DBMS do type inference
author Adam Chlipala <adam@chlipala.net>
date Sat, 04 Jul 2015 19:24:26 -0400
parents f55b0e45422f
children
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line source
table foo : { Bar : int, Baz : string }
  PRIMARY KEY Baz

fun main () : transaction page =
    rs <- queryX1 (SELECT foo.Bar FROM foo WHERE foo.Baz = 'Hi')
          (fn r => <xml>{[r.Bar]}</xml>);
    return <xml><body>{rs}</body></xml>