Re: [basex-talk] XQuery update: updating inside a closure & how to modify a node and insert it in a DB

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