title: ArangoDB AQL LIKE function does not use indexes
body: <p>Since the great devel version v2.7.0-rc1, we can use a like function.</p>
  
  <p>That's awesome but how can one combine the new function with an index. I have tried the hash, skip-list and the fulltext index but no one is used by the explain function.</p>
  
  <p>Any ideas?</p>