Performance of recursive stored procedures in MYSQL to get hierarchical data

Question

I have table employee like,
employee ( emp_id int primary key, emp_name varchar(50), mngr_id int)

and here mngr_id would either null or contain valid emp_id. Th

Answer 1

Tomalak: " ... I would do the recursion in the presentation layer of my app ... "

This would mean every time the recursion happened another call is sent to the database server from the presentation layer. That would be incredibly slow.