title: Can you update thousands of records in core data without loading them in memory?
body: <p>If I have thousands of records, is it possible to update a boolean flag on all the records without loading them to memory?</p>
  
  <p>If not, is it possible to connect to sqlite directly to do this?</p>
  
  <p>Say my model has a IsNew boolean flag that I need to update on 10000 records, I don't want to load them all in memory to do this.</p>