MySQL Query执行但抛出异常

My code:

try {
    sql::Driver *driver;
    sql::Connection *con;
    sql::Statement *stmt;

    /* Create a connection */
    driver = get_driver_instance();
    con = driver->connect("tcp://127.0.0.1:3306", "root", "123456");

    stmt = con->createStatement();
    stmt->executeQuery("CREATE USER 'user22'");

    delete stmt;
    delete con;

} catch (sql::SQLException &e) {
    cout << "# ERR: " << e.what();
    cout << " (MySQL error code: " << e.getErrorCode();
    cout << ", SQLState: " << e.getSQLState() << " )" << endl;
}
try {
    sql::Driver *driver;
    s