protected function createIndexes()
    {
    // sitemap_sitemaprecord table
        $this->createIndex(
            $this->db->getIndexName(
                '{{%dolphiq_sitemap_entries}}',
                ['type', 'linkId'],
                true
            ),
            '{{%dolphiq_sitemap_entries}}',
            ['type', 'linkId'],
            true
        );
        // Additional commands depending on the db driver
        switch ($this->driver) {
            case DbConfig::DRIVER_MYSQL:
                break;
            case DbConfig::DRIVER_PGSQL:
                break;
        }
    }