Re: Data type to use for primary key

> What is the common approach? Should I use directly the product_code as
> my ID, or use a sequantial number for speed? (I did the same for the
> company_id, this is a 'serial' and not the shor name of the customer.
> I just don't know what is usually done.

	Use a serial :
	- you can change product_code for a product easily
	- you can pass around integers easier around, in web forms for instance,  
you don't have to ask 'should I escape this string ?'
	- it's faster
	- it uses less space
	- if one day you must manage products from another source whose  
product_code overlap yours, you won't have problems
	- you can generate them with a serial uniquely and easily