public final InspectableObject getNextRow() throws IOException {
      if (currentMinSegment != null) {
        adjustPriorityQueue(currentMinSegment);
      }
      Integer current = top();
      if (current == null) {
        LOG.info("MergeQueue forwarded " + counter + " rows");
        return null;
      }
      counter++;
      currentMinSegment = current;
      return keys[currentMinSegment].getRight();
    }
Implements the getName function for the Node Interface.

@return the name of the operator
ql/src/java/org/apache/hadoop/hive/ql/exec/SMBMapJoinOperator.java