title: AWS DynamoDB BatchGetItem without HaskKey or RangeKey
body: <p>I am trying fetch items from DynamoDB using BatchGetItem. I'm searching in 2 tables. <a href="https://github.com/awslabs/aws-dynamodb-examples/blob/master/src/main/java/com/amazonaws/codesamples/lowlevel/LowLevelBatchGet.java" rel="nofollow noreferrer">This</a> is the example I am following. Is hash key and range key mandatory to fetch items? I want to fetch using attributes which are not either hash key or range key. Is this possible using BatchGetItem? Or can we fetch with indexed attributes?</p>
  
  <p>Thanks in advance.</p>