Dimana taro paginationny?

ane punya problem gini biasany kan gampangny pagination $this->db->get('table', $limit,$start) nah kalo di ane gimana ya ga bisa kaya gitu soalny bingung

public function getOrder($limit, $start)
    {

        $query = "SELECT * FROM `order_brg`
        INNER JOIN `barang` ON `order_brg`.`nm_barang` = `barang`.`id_brg`
        INNER JOIN `user` ON `order_brg`.`id_pelanggan` = `user`.`id`
        where `id_pelanggan` = '" . $_SESSION['id'] . "'
        ";
        $this->db->get($query, $limit, $start);
        return $query;
    }