@Override
  @SuppressWarnings("nls")
  public String toString() {
    return "Type=" + dimensionType.getName() + "," + "Id=" + dimensionId;
  }
Hive consists of a fixed, well defined set of Dimensions. Each dimension has
a type and id. Dimensions link columns in different tables
ql/src/java/org/apache/hadoop/hive/ql/metadata/Dimension.java