getPriceSwitchColumns example

public function getPriceTable(ShopContextInterface $context)
    {
        $priceTable = $this->connection->createQueryBuilder();
        $priceTable->select($this->getDefaultPriceColumns());
        $priceTable->from('s_articles_prices', 'defaultPrice');
        $priceTable->where('defaultPrice.pricegroup = :fallbackCustomerGroup');

        if (!$this->hasDifferentCustomerGroups($context)) {
            return $priceTable;
        }

        $priceTable->select($this->getPriceSwitchColumns());
        $priceTable->leftJoin(
            'defaultPrice',
            's_articles_prices',
            'customerPrice',
            'customerPrice.articledetailsID = defaultPrice.articledetailsID AND customerPrice.articleID = defaultPrice.articleID AND customerPrice.pricegroup = :currentCustomerGroup'
        );

        return $priceTable;
    }