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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 f7d9dc5d57eb
children
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table t : {A : int, B : int}
  PRIMARY KEY {{primary_key [#A] [[B = _]]}}

fun main () : transaction page =
    queryI (SELECT * FROM t) (fn _ => return ());
    return <xml/>