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view tests/coalesce.ur @ 2001:16f5f136a807

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uw_register_transactional() can return error codes
author Adam Chlipala <adam@chlipala.net>
date Thu, 17 Apr 2014 17:41:24 -0400
parents e44be6ece475
children
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line source
table t : { A : option int }

fun main () : transaction page =
    queryX (SELECT COALESCE(t.A, 13)
            FROM t)
    (fn r => <xml>{[r.1]},</xml>)