src/main/java/org/apache/datasketches/pig/theta/Intersect.java [353:369]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      final DataBag outerBag = extractBag(inputTuple); //InputTuple.bag0
      if (outerBag == null) {  //must have non-empty outer bag at field 0.
        return this.myEmptyCompactOrderedSketchTuple_;
      }
      //Bag is not empty.

      for (Tuple dataTuple : outerBag) {
        final Object f0 = extractFieldAtIndex(dataTuple, 0); //inputTuple.bag0.dataTupleN.f0
        //must have non-null field zero
        if (f0 == null) {
          continue; //go to next dataTuple if there is one.  If none, exception is thrown.
        }
        //f0 is not null
        if (f0 instanceof DataBag) {
          final DataBag innerBag = (DataBag)f0; //inputTuple.bag0.dataTupleN.f0:bag
          if (innerBag.size() == 0) {
            continue; //go to next dataTuple if there is one.  If none, exception is thrown.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



src/main/java/org/apache/datasketches/pig/theta/Union.java [477:493]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      final DataBag outerBag = extractBag(inputTuple); //InputTuple.bag0
      if (outerBag == null) {  //must have non-empty outer bag at field 0.
        return this.myEmptyCompactOrderedSketchTuple_;
      }
      //Bag is not empty.

      for (Tuple dataTuple : outerBag) {
        final Object f0 = extractFieldAtIndex(dataTuple, 0); //inputTuple.bag0.dataTupleN.f0
        //must have non-null field zero
        if (f0 == null) {
          continue; //go to next dataTuple if there is one.  If none, exception is thrown.
        }
        //f0 is not null
        if (f0 instanceof DataBag) {
          final DataBag innerBag = (DataBag)f0; //inputTuple.bag0.dataTupleN.f0:bag
          if (innerBag.size() == 0) {
            continue; //go to next dataTuple if there is one.  If none, exception is thrown.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -