xquery & web server in browser

[Liam Quin]

On Thu, Jun 18, 2009 at 11:53:13AM +0000, Florent Georges wrote:
> Robert Koberg wrote:
> > Why? To me, the best thing about XQuery is that it can run
> > natively (and more efficiently than the more encompassing
> > XSL)

The XQuery implementations in SQL databases such as IBM DB2
and Oracle can go directly to the underlying data store,
bypassing the SQL layer.

>   Well, I think it depends (I mean XQuery more efficient
> than XSLT.)  If the query use dynamic dispatching of nodes
> (aka pattern matching) or grouping, I would expect XSLT to
> be more efficient.

I don't think there's any difference here.

If you're using apply-templates, that's native in XSLT and
you have to write your own in XQuery, so that may make a
difference.  Efficiency is something you have to measure,
though, not speculate upon, really... and all I can say
there is I've found two orders of magnitude between XQuery
runtimes for the same query on the same data, but that's not
uncommon for SQL queries either.

Liam


-- 
Liam Quin, W3C XML Activity Lead, http://www.w3.org/People/Quin/
http://www.holoweb.net/~liam/ * http://www.fromoldbooks.org/