title: Truncate DynamoDb or rewrite data via Data Pipeline
body: <p>There is possibility to dump DynamoDb via Data Pipeline and also import data in DynamoDb. Import is going well, but all the time data appends to already exists data in DynamoDb.</p>
  
  <p>For now I found work examples that scan DynamoDb and delete items one by one or via Batch. But at any rate for big amount of data it is not good variant.</p>
  
  <p>Also it is possible to delete table at all and create it. But with that variant indexes will be lost.</p>
  
  <p>So, best way would be to override DynamoDb data via import by Data Pipeline or truncate somehow. Is it possible to do? And how is it possible if yes?</p>