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view tests/coalesce.ur @ 1707:c05e2e4bdde7

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Refactor to avoid dependence on recursive mutexes
author Adam Chlipala <adam@chlipala.net>
date Sun, 08 Apr 2012 16:24:16 -0400
parents e44be6ece475
children
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table t : { A : option int }

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