Hi again, Omar,
The behavior may be surprising, but it's valid: If it can be detected at
compile time that an expression will never yield results, it can be
simplified and rewritten to an empty sequence, no matter if a referenced
database may possibly exist at runtime.
Hope this helps,
Christian
Omar Siam <omar.s...@oeaw.ac.at> schrieb am Do., 23. März 2023, 14:49:
> Hi,
>
> Either I found an interesting new XQuery feature or a bug:
>
> collection('i_do_not_exist')/some/path[@attr=()] retruns the empty
> sequence whereas
>
> collection('i_do_not_exist')/some/path throws an error err:FODC0002 so
> does collection('i_do_not_exist')/ome/path[@attr="i_am_an_attr"]
>
> Am I missing something?
>
> Best regards,
>
> --
> Mag. Ing. Omar Siam
> Austrian Center for Digital Humanities and Cultural Heritage
> Österreichische Akademie der Wissenschaften | Austrian Academy of Sciences
> Stellvertretende Behindertenvertrauensperson | Deputy representative for
> disabled persons
> Bäckerstraße 13, 1010 Wien, Österreich | Vienna, Austria
> T: +43 1 51581-7295
> omar.s...@oeaw.ac.at | www.oeaw.ac.at/acdh
>
>
