What value does CodeIgniter's query() return when given a SELECT query?

I want to evaluate the return value of CodeIgniter's query() which is given a SELECT query to execute.

For example:

$get = "select filed_1 from tbl_ctc where ctc=?";$get = $this->db->query($get,array($ctc_n));if ($get){ //do some operations }else{ //do some another operations }

What will be the return value of $get if it is success?