title: DynamoDB condition ttl
body: <p>Does DynamoDB support TTL based on specific conditions? For example, I want the TTL to be enabled on records with a specific attribute and no TTL on records which does not have a value for that attribute.</p>
  
  <p>The docs I've currently read to look into this issue are </p>
  
  <ol>
  <li><a href="http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/howitworks-ttl.html" rel="noreferrer">http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/howitworks-ttl.html</a></li>
  <li><a href="http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/time-to-live-ttl-how-to.html" rel="noreferrer">http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/time-to-live-ttl-how-to.html</a></li>
  </ol>
  
  <p>Both the docs indicate no specific information on that. </p>
  
  <p>Thanks,</p>