protected function execute($statement, $args = null)
{
$query = \OC::$server->getDatabaseConnection()->prepare($statement);
if (!is_null($args)) {
$result = $query->execute($args);
} elseif (count($this->data)) {
$result = $query->execute($this->data);
} else {
$result = $query->execute();
}
return $result ? $query : false;
}