Doctrine\DBAL\Connection::commitAll PHP Method

    private function commitAll()
    {
        while (0 !== $this->_transactionNestingLevel) {
            if (false === $this->autoCommit && 1 === $this->_transactionNestingLevel) {
                // When in no auto-commit mode, the last nesting commit immediately starts a new transaction.
                // Therefore we need to do the final commit here and then leave to avoid an infinite loop.
                $this->commit();
                return;
            }
            $this->commit();
        }
    }