@Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (!super.equals(obj)) {
      return false;
    }
    BaseCharTypeInfo other = (BaseCharTypeInfo) obj;
    if (length != other.length) {
      return false;
    }
    return true;
  }
Utility method to build the fully qualified data type. For example:
(char,16) becomes char(16).

@param typeName The name of the data type (char or varchar)
@param length The maximum length of the data type
@return A fully qualified field name
serde/src/java/org/apache/hadoop/hive/serde2/typeinfo/BaseCharTypeInfo.java