Combining 3 databases in cart
I am pulling from 3 different product databases in the shopping cart. I used the default products table for one of the databases and I want to validate the stock levels for this table only. For the other 2 databases that I am using in the cart I do not want it to use the stock validation as all of this product is considered unlimited. How can I have the shopping cart and confirm page only validate the stock levels of the items in the products table and ignore the other 2 tables.