@Deprecated
  private static String getFullyQualifiedName(String... names) {
    List<String> nonNullAndEmptyNames = Lists.newArrayList();
    for (String name : names) {
      if (name != null && !name.isEmpty()) {
        nonNullAndEmptyNames.add(name);
      }
    }
    return Joiner.on(".").join(nonNullAndEmptyNames);
  }
Compute raw data size from column statistics
@param numRows
         - number of rows
@param colStats
         - column statistics
@return raw data size
ql/src/java/org/apache/hadoop/hive/ql/stats/StatsUtils.java