@Override
  public String getName() {
    return LateralViewForwardOperator.getOperatorName();
  }
LateralViewForwardOperator. This operator sits at the head of the operator
DAG for a lateral view. This does nothing, but it aids the predicate push
down during traversal to identify when a lateral view occurs.
ql/src/java/org/apache/hadoop/hive/ql/exec/LateralViewForwardOperator.java