public function revokeRootPrivileges()
    {
        if ($this->revokeRootStatement == null) {
            $this->revokeRootStatement =
                $this->connection->prepare("DELETE FROM UserPrivileges WHERE username = ? AND rootPrivileges = 1");
            $u = $this->user->getUsername();
            $this->revokeRootStatement->bindParam(1, $u);
        }
        $this->revokeRootStatement->execute();
        $this->rootPrivilege = false;
    }