code: private void writeDecimalcolumn(DecimalColumnVector col, int cIdx,
                                    int rowNumber, ParseWriter dout) {
      HiveDecimalWritable[] oneColumn = col.vector;
      if(col.isRepeating) {
        HiveDecimal hd = oneColumn[0].getHiveDecimal();
        for (int rowIndex = 0; rowIndex < rowNumber; rowIndex++)
          dout.addNumCol(cIdx, hd.unscaledValue().longValue(),-hd.scale());
      } else  if(col.noNulls) {
        for (int rowIndex = 0; rowIndex < rowNumber; rowIndex++) {
          HiveDecimal hd = oneColumn[rowIndex].getHiveDecimal();
          dout.addNumCol(cIdx, hd.unscaledValue().longValue(),-hd.scale());
        }
      } else {
        boolean [] isNull = col.isNull;
        for (int rowIndex = 0; rowIndex < rowNumber; rowIndex++) {
          if (isNull[rowIndex])
            dout.addInvalidCol(cIdx);
          else {
            HiveDecimal hd = oneColumn[rowIndex].getHiveDecimal();
            dout.addNumCol(cIdx, hd.unscaledValue().longValue(), -hd.scale());
          }
        }
      }
    }
docs: This method writes a column to H2O frame for column type Decimal.  It is just written as some
  integer without using the scale field.  Need to make sure this is what the customer wants.
  
  @param col
  @param cIdx
  @param rowNumber
  @param dout