Is there a way to return a non-associative array as a result of a CI database query?

Say, I have this table:

id | Name
 1 | Name1
 2 | Name2
 3 | Name3
 4 | Name4

I want the names to be returned non-associatively.

$this->db->select('tablename')->result_array() returns an array of associative arrays.

Is this even possible in CodeIgniter? I don't want to have to add a foreach block to re-index the keys in every row if there is another way.