title: DynamoDB query row number
body: <p>Can i smhow get index of a query response in DyanmoDB?</p>
  <p><code>[hashKey exists, sortKey exists]</code></p>
  <p><code>query { KeyCondExp = &quot;hashKey = smthin1&quot;, FilterExp = &quot;nonPrimeKey = smthin2&quot; }</code></p>
  <p>I need index of row according to sortKey for that selected document</p>