@Override
    public String getURL()
            throws SQLException
    {
        return JDBC_URL_START + connection.getURI().toString();
    }
@Test
    public void testGetUrl()
            throws Exception
    {
        DatabaseMetaData metaData = connection.getMetaData();
        assertEquals(metaData.getURL(), "jdbc:presto://" + server.getAddress());
    }