If it is too confusing you can also just put xquery version "1.0" on the top of your query, which turns function mapping off as well. But then you will have to do without goodies like try-catch and such..
;-) > drs. G.P.H. (Geert) Josten Consultant Daidalos BV Hoekeindsehof 1-4 2665 JZ Bleiswijk T +31 (0)10 850 1200 F +31 (0)10 850 1199 mailto:geert.jos...@daidalos.nl http://www.daidalos.nl/ KvK 27164984 P Please consider the environment before printing this mail. De informatie - verzonden in of met dit e-mailbericht - 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. > From: general-boun...@developer.marklogic.com > [mailto:general-boun...@developer.marklogic.com] On Behalf Of > Danny Sokolsky > Sent: zaterdag 3 april 2010 2:38 > To: General Mark Logic Developer Discussion > Subject: RE: [MarkLogic Dev General] Unexpected behavior > > Right. And the other point I was trying to make is that if > the function takes a zero-or-one parameter, such as > "xs:string?", then it is valid to pass in the empty sequence > and function mapping will not happen on that parameter. Here > is an example: > > xquery version "1.0-ml"; > > declare function local:will-map($x as xs:string) { $x, > "function will-map was run" > }; > > declare function local:no-map($x as xs:string?) { $x, > "function no-map was run" > }; > > "function will-map with empty sequence arg: > ", > local:will-map(()), > "function no-map with empty sequence arg: > ", > local:no-map(()) > > => > function will-map with empty sequence arg: > > function no-map with empty sequence arg: > > function no-map was run > > Clear as mud? > -Danny > > -----Original Message----- > From: general-boun...@developer.marklogic.com > [mailto:general-boun...@developer.marklogic.com] On Behalf Of > Micah Dubinko > Sent: Friday, April 02, 2010 5:07 PM > To: General Mark Logic Developer Discussion > Subject: Re: [MarkLogic Dev General] Unexpected behavior > > Close. :-) > > On Apr 2, 2010, at 4:15 PM, spig wrote: > > > So, let me make sure I understand. > > > > When I declare a function with any number of parameters, if > one of those parameters requires a singleton, and I pass in > an empty sequence, the function will not likely be called if > function mapping is on. This makes sense to me now. > > With function mapping enabled, if a function takes a > singleton argument, and you pass in a sequence, your function > will be called n times, where n is the length of the > sequence. This is true even when n is 0. > > > > > > And, by similar logic, it will not throw an error because > the function requires a singleton parameter, and I have > provided one, albeit the empty sequence. And, since the empty > sequence is a valid singleton (is that true) it will not > throw an error because the parameters are valid. > > Actually, empty sequence is never a valid instance of a > singleton type. In cases like these the error fails to throw > not because the parameter is valid, but because the function > itself never gets called. > > This is easy to get mixed up. I still do at times. -m > > > _______________________________________________ > General mailing list > General@developer.marklogic.com > http://xqzone.com/mailman/listinfo/general > _______________________________________________ > General mailing list > General@developer.marklogic.com > http://xqzone.com/mailman/listinfo/general > _______________________________________________ General mailing list General@developer.marklogic.com http://xqzone.com/mailman/listinfo/general
