[FlightSQLJDBC] not implemented exception when fetching TimeStamp from ResultSet #818

try (var connection = DriverManager.getConnection("jdbc:arrow-flight://localhost:5000;useEncryption=false");
             PreparedStatement createStatement = connection.prepareStatement("create table if not exists test (ts timestamp, id bigint)");
             PreparedStatement insertStatement = connection.prepareStatement("insert into test values ('1970-04-01 21:39:50', 2)");
             PreparedStatement selectStatement = connection.prepareStatement("select ts from test where id = 2")
) {

    createStatement.execute();
    insertStatement.executeUpdate();

    try (var rs = selectStatement.executeQuery()) {
        while (rs.next()) {

            // Fails with a not implemented exception
            System.out.println(rs.getObject(1)); 

            // works
            System.out.println(rs.getObject("ts")); 
        }
    }
}