[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Re: [xquery-talk] JDBC in an XQuery world (?)
On Sun, 2011-10-02 at 14:42 -0400, John Cowan wrote: > Liam R E Quin scripsit: > > > > What if I have (or want) an XQuery database > > > (or would you call that a XML database with an XQuery interface ...?) > > > > SQL/XML I think describes enough of a mapping, no? > > I don't think so. SQL/XML extends SQL to add XML as a new kind of primitive > SQL data type, like strings, numbers, and dates. What's needed here is a > way to do ordinary SQL operations over an XDM-based database. I saw David's first question as having two aspects - could you connect to a remote XQuery database using ODBC/JDBC and send it XQuery expressions... the answer is probably, given that SQL has an XQuery function now. The other aspect, could you map from the XDM into SQL types, is also addressed by SQL/XML, as I understand it (e.g. how xs:dateTime maps to SQL date) so that you can use the results... When we published the XQuery 1.0 Recommendation we were careful to liaise between the editor of the ISO SQL work and the (co-)chair of the W3C XQuery work... which was a straightforward mapping also. The other question is, could you provide something jdbc-like but with no SQL at all, not even a one-line wrapper function, and return XDM instances directly to a system that can deal with this. Sure, and we could probably define an xdm:// or xquery:// URI scheme too. Lots of interesting possibilities. Liam -- Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/ Pictures from old books: http://fromoldbooks.org/
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