title: NSPredicate to check for NULL, and blank strings in Core Data
body: <p>As CoreData length is not supported and CoreData translates the predicate name.length > 1 to sqlite in name > 1... While it should be length(name) > 1.</p>
  
  <p>We can use this one:
      [NSPredicate predicateWithFormat:@"NOT name MATCHES '^\s*$'"];</p>
  
  <p>But regular expression will have a higher computation cost (takes longer than to evaluate a regex than simple equality).</p>
  
  <p>SO how i have to do fetch.Any best idea ?</p>