public function getAutoIncrementString()
    {
        if ($this->isAutoIncrement() && IdMethod::NATIVE === $this->parentTable->getIdMethod()) {
            return $this->getPlatform()->getAutoIncrement();
        }

        if ($this->isAutoIncrement()) {
            throw new EngineException(sprintf(
                'You have specified autoIncrement for column "%s", but you have not specified idMethod="native" for table "%s".',
                $this->name,
                $this->parentTable->getName()
            ));
        }

        return '';
    }