sql - PL/pgSQL リターン SETOF レコード エラー

Question

私はpostgresqlに比較的慣れておらず、慣れるために苦労しています。新しい pl/sql 関数の作成中にエラーが発生しました。エラー: タイプ "ordered_pa​​rts" は存在しません

CREATE OR REPLACE FUNCTION get_ordered_parts(var_bill_to integer)
  RETURNS SETOF ordered_parts AS
$BODY$
declare

    var_ordered_id record;
    var_part ordered_parts;

begin

    for var_ordered in select order_id from view_orders where bill_to = var_bill_to
    loop

        for var_part select os.po_num,os.received,os.customer_note,orders.part_num,orders.description,orders.order_id,orders.remaining_quantity from (select vli.part_num,vli.description,vli.order_id,vli.quantity - vli.quantity_shipped as remaining_quantity from view_line_items as vli where vli.order_id in (select order_id from view_orders where bill_to = var_bill_to and order_id = var_ordered.order_id) and vli.quantity - vli.quantity_shipped > 0)as orders left join order_sales as os on orders.order_id = os.order_id
        then

            -- Then we've found a leaf part
            return next var_part;

        end if;

    end loop;

end;
$BODY$
  LANGUAGE 'plpgsql' VOLATILE
  COST 100
  ROWS 1000;
ALTER FUNCTION get_ordered_parts(integer) OWNER TO postgres;