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view tests/filter.ur @ 1990:7bd2ecf96bb0

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Fixed issue with datatype constructors inside functors; now on to some problem with modules inside functors
author Adam Chlipala <adam@chlipala.net>
date Thu, 20 Feb 2014 10:48:17 -0500
parents 6d9538ce94d8
children
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fun filter [fs ::: {Type}] [ks] (t : sql_table fs ks) (p : sql_exp [T = fs] [] [] bool)
   : sql_query [T = fs] [] =
   (SELECT * FROM t WHERE {p})

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

fun main () =
    queryX (filter t (WHERE t.A > 3))
           (fn r => <xml>{[r.T.A]}, {[r.T.B]}</xml>)