public function isColumnAppendPK(): bool
    {
        if (empty($this->append)) {
            return false;
        }

        if ($this->schema === TableStructure::SCHEMA_MSSQL) {
            if (stripos($this->append, 'IDENTITY') !== false && stripos($this->append, 'PRIMARY KEY') !== false) {
                return true;
            }
        } elseif (stripos($this->append, 'PRIMARY KEY') !== false) {
            return true;
        }

        return false;
    }