</pre>
* Since {{Version|8.0}}, the [[Options#MIXUPDATE|MIXUPDATE]] option is available. All updating constraints will be turned off. Nodes , and nodes to be returned will be copied before they are modified by updating expressions. An error is raised if items are returned within a transform expression.
If you want to modify temporary nodes in main memory without storing them in a database, you can use the [[Update#transform|transform expression]].
===Function Declaration===