n
      DynamoDB scan operation does not sort the result. However, Apple's <a
      href="https://developer.apple.com/library/ios/#documentation/Cocoa/Reference/CoreDataFramework/Classes/NSManagedObjectContext_Class/NSManagedObjectContext.html">NSManagementObjectContext
      Class Reference</a> states that "if you fetch some objects, work with
      them, and then execute a new fetch that includes a superset of those
      objects, you do not get new instances or update data for the existing
      ob