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Properly freeing libpq results on errors
author Adam Chlipala <adamc@hcoop.net>
date Fri, 24 Oct 2008 17:30:07 -0400
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table t : { X : int }

fun main () : transaction page =
    v <- query (SELECT * FROM t)
         (fn r (_ : int) => return (error <xml>Shot down!</xml>))
         0;
    return <xml>Result: {[v]}</xml>