Hi,
By default when you create a product, it has an unlimited quantity. You have to enter it manually if you want to specify a stock.
There is no option for setting an unlimited quantity for all products or not using the quantity value in the database ; excepted if you have modified the HikaShop core.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.