What are in memory elements in marklogic?

Question

I have couple of documents on which xdmp:node-replace() over certain elements doesnot work. There are some other set of documents which are almost similar to th

Answer 1

Anything constructed within a query is an in-memory element. For example this XQuery yields an in-memory element:

Some function calls also return in-memory elements: xdmp:unquote is an obvious example. Any node that doesn't come from the current database will be treated as an in-memory node.

This query yields a database element (if it exists), which could be modified using xdmp:node-replace:

doc('fubar')/test

This is a typical in-memory update error:

xdmp:node-replace(, )

With MarkLogic 6.0-1.1, the error code is XDMP-UPCONSTNODES.