DeleteQuery::execute PHP Method

    public function execute()
    {
        $result = parent::execute();
        if ($result) {
            return $result->rowCount();
        }
        return false;
    }

 public function post_permissions($component = false)
 {
     $parameters = array();
     $query = new DeleteQuery('Permission');
     $query->filter("`role` != 'nobody'")->filter("`role` != 'superadmin'");
     if ($component) {
         $query->filter('`subject` = :component');
         $parameters[':component'] = class_for_url($component);
     }
     $result = $query->execute($parameters);
     if ($result === false) {
         Backend::addError('Could not empty permissions table');
         return false;
     }
     $permission = new PermissionObj();
     $count = 0;
     foreach (Controller::getPayload() as $key => $roles) {
         if (strpos($key, '::') === false) {
             continue;
         }
         list($subject, $action) = explode('::', $key, 2);
         foreach ($roles as $role => $value) {
             $data = array('subject' => $subject, 'action' => $action, 'role' => $role);
             if ($permission->replace($data)) {
                 $count++;
             }
         }
     }
     return $count;
 }