FUNCTION skrzatparty.pl_calculateProductPriceForUser does not exist
SELECT `products`.*, `products_ext`.*, `products`.`fPrice` AS `fCatalogPrice`, pl_calculateProductPriceForUser( NULL, `iProduct`, 1 ) AS `fPrice`, `products_canbuy`.`iCanBuyProduct` AS `iCanBuy` FROM `pl_products` AS `products` LEFT JOIN `pl_products_ext` AS `products_ext` USING ( `iProduct` ) LEFT JOIN `pl_products_canbuy_client` AS `products_canbuy` USING ( `iProduct` ) WHERE `products`.`iProduct` = '326' AND `products`.`iStatus` >= 1