title: what will happen if we insert into dynamo DB with a duplicate hash key?
body: <p>I am trying to insert into dynamo DB. When I call the putItem function what will happen if the hash key is already present in the DB? Does the PutItemResult object contain something which can tell us if a duplicate hash entry was attempted? I want to avoid running another query to check if there is an entry with the hash key I am using.</p>