On Thu, Nov 22, 2012 at 2:40 PM, Christian Grün
<christian.gruen@gmail.com> wrote:
Hi Daniel,
> Doesn't it introduce performance problems though? If you do this copying with some bigger chunk of XML does it take the same amount of memory or is it somehow "delta" optimized?
Yes; this is due to the specification, btw. Whatever you copy in your
XQUF spec. is supposed to be cached before it is being evaluated.
Regarding updating operations in closures: the current version of the
spec. disallows updating operations, because it cannot be statically
determined if a dynamic function invocation is an updating expression
or not. See [1] for more details.
Best,
Christian
[1] http://www.w3.org/TR/xquery-update-30/#id-dynamic-function-invocation