@org.apache.thrift.annotation.Nullable
  public java.lang.Object getFieldValue(_Fields field) {
    switch (field) {
    case COLUMN_NAME:
      return getColumnName();

    case TYPE_DESC:
      return getTypeDesc();

    case POSITION:
      return getPosition();

    case COMMENT:
      return getComment();

    }
    throw new java.lang.IllegalStateException();
  }
Returns true if field comment is set (has been assigned a value) and false otherwise
service-rpc/src/gen/thrift/gen-javabean/org/apache/hive/service/rpc/thrift/TColumnDesc.java