title: I want to get all data in elasticsearch 5.4
body: <p>I used <code>size :0</code> in <code>Elasticsearch 2.x</code> but now in <code>Elasticsearch 5.4</code> this can not be used.</p>
  
  <p>How do I get the same effect as <code>size: 0</code> in <code>Elasticsearch 5.4</code> ? </p>