Where to I edit the product search SQL

What page(s) do I edit if I want to modify and/or add a new product search method. I’m looking for the SQL.

I think I found it


Yup, that’s it.

[quote name=‘mdekok3000’]Yup, that’s it.[/QUOTE]

Thanks. Now that I get in there, I have this additional question at


If you have any knowledge on this I would appreciate it.