How to retrieve database error from CodeIgniter

[eluser]iMefisto[/eluser]
I'm doing this:

in my model, delete example:

Code:

function del($id) {
  $this->db->where('id', $id);

  $this->db->delete('mytable');    
        
  return $this->db->_error_number()==0;

}

if return is false, then I can handle the error with $this->db->_error_number