Hi, This is the result of function mapping (see section 3.11 of the 4.0 release notes, at http://developer.marklogic.com/pubs/4.0/books/relnotes.pdf).
It can be a little startling if you're not expecting it. Function mapping allows you to pass a sequence into a function that accepts singletons, and have the function execute once for every item in the sequence. What you're seeing is that since you passed in an empty sequence, it was never executed. For more details on how this works, including how to disable it if necessary, see section 3.2 of the XQuery Reference Guide: http://developer.marklogic.com/pubs/4.0/books/xquery.pdf Cheers, --Colleen -----Original Message----- From: [EMAIL PROTECTED] on behalf of Geert Josten Sent: Thu 11/6/2008 8:12 AM To: MarkLogic General ML Subject: [MarkLogic Dev General] Empty argument fails silently? Hi, When passing an empty sequence where a node() is expected, the function does not execute, nor is a 'coercion' error is raised either. Is it supposed to work like this? With following example I would expect either the string 'blabla' or an error, but instead I am getting 'bla'. --------- xquery version "1.0-ml"; declare default function namespace "my"; declare function elem($arg as node()) as xs:string { "bla" }; elem(()), elem(<bla/>) --------- I am running on MarkLogic Server 4.0-1.. Kind regards, Geert Drs. G.P.H. Josten Consultant http://www.daidalos.nl/ Daidalos BV Source of Innovation Hoekeindsehof 1-4 2665 JZ Bleiswijk Tel.: +31 (0) 10 850 1200 Fax: +31 (0) 10 850 1199 http://www.daidalos.nl/ KvK 27164984 De informatie - verzonden in of met dit emailbericht - is afkomstig van Daidalos BV en is uitsluitend bestemd voor de geadresseerde. Indien u dit bericht onbedoeld hebt ontvangen, verzoeken wij u het te verwijderen. Aan dit bericht kunnen geen rechten worden ontleend. _______________________________________________ General mailing list [email protected] http://xqzone.com/mailman/listinfo/general
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