Is this a LEFT join by default ?

[eluser]cPage[/eluser]
Is this a LEFT join by default ?

Code:

function access($group_id)
{
  $this->db->select('*');
  $this->db->from('access');
  $this->db->join('groups', 'groups.id_group = access.group_id');
  $this->db->where('group_id',$group_id);
  $query = $this->db->get();
  return $query->result();
}