Smile\ElasticsuiteVirtualCategory\Model\ResourceModel\Product\Indexer\Fulltext\Datasource\CategoryData::getCategoryProductSelect PHP Метод

    protected function getCategoryProductSelect($productIds, $storeId)
    {
        $select = $this->getConnection()->select()->union([$this->getBaseSelect($productIds, $storeId), $this->getVirtualSelect($productIds)]);
        return $select;
    }