@Override
    public String toString(){
      return Arrays.asList(values).toString();
    }
Return whether the specified column (0-based index) is
a primary key. Since this method depends on whether the
JDBC driver property implements {@link ResultSetMetaData#getTableName} (many do not), it
is not reliable for all databases.
beeline/src/java/org/apache/hive/beeline/Rows.java