@Explain(vectorization = Vectorization.OPERATOR, displayName = "Limit Vectorization", explainLevels = { Level.DEFAULT, Level.EXTENDED })
  public LimitOperatorExplainVectorization getLimitVectorization() {
    VectorLimitDesc vectorLimitDesc = (VectorLimitDesc) getVectorDesc();
    if (vectorLimitDesc == null) {
      return null;
    }
    return new LimitOperatorExplainVectorization(this, vectorLimitDesc);
  }
not to print the offset if it is 0 we need to turn null.
use Integer instead of int.
ql/src/java/org/apache/hadoop/hive/ql/plan/LimitDesc.java