private String mm(int majorVersion, int minorVersion) {

    return majorVersion + "." + minorVersion;

  }



  @Test public void testMetaDataColumns()

      throws ClassNotFoundException, SQLException {

    Connection connection = CalciteAssert

        .that(CalciteAssert.Config.REGULAR).connect();

    DatabaseMetaData metaData = connection.getMetaData();

    ResultSet resultSet = metaData.getColumns(null, null, null, null);

    assertTrue(resultSet.next()); // there's something

    String name = resultSet.getString(4);

    int type = resultSet.getInt(5);

    String typeName = resultSet.getString(6);

    int columnSize = resultSet.getInt(7);

    int decimalDigits = resultSet.getInt(9);

    int numPrecRadix = resultSet.getInt(10);

    int charOctetLength = resultSet.getInt(16);

    String isNullable = resultSet.getString(18);

    resultSet.close();

    connection.close();

  }