/** * Method to roll back a transaction. * * @param boolean $toSavepoint If true, rollback to the last savepoint. * * @return void * * @since 12.3 * @throws RuntimeException */ public function transactionRollback($toSavepoint = false) { $this->connect(); if (!$toSavepoint || $this->transactionDepth <= 1) { parent::transactionRollback($toSavepoint); } else { $savepoint = 'SP_' . ($this->transactionDepth - 1); $this->setQuery('ROLLBACK TO SAVEPOINT ' . $this->quoteName($savepoint)); if ($this->execute()) { $this->transactionDepth--; } } }