text based primary keys

[eluser]Bramme[/eluser]
Hey everybody

I wonder what the objections, if any, are against using text-based primary keys.

I'm building a little backend where I store my controllers in a db table 'controller_id', 'controller_name' and 'controller_fancy_title'.

In other tables I reference controller_id, but I might as well use controller_name (the filename of the controllers without .php), it's a unique key anyway.