function __destruct()
{
if ($this->db->inTransaction() && is_resource($this->db->getLink())) {
$this->closeCursor();
$this->closeTransaction();
}
}
private function beginTransaction(IsolationLevel $level = null, AccessMode $mode = null)
{
$this->assertFinished();
if (!$this->db->inTransaction()) {
$this->db->begin($level, $mode);
} else {
$this->savepointName = $this->createSavepointName();
$this->db->savepointBegin($this->savepointName);
}
}