执行 postgres 函数时出错：该函数不返回“COMPOSITE”类型

Question

我在 hasura 中写了这个 postgres 函数

DROP FUNCTION IF EXISTS get_shipment_data(TEXT, DATE); 
CREATE OR REPLACE FUNCTION get_shipment_data(carriercode TEXT, shipdate DATE) 
RETURNS SETOF RECORD 
AS $$ DECLARE r RECORD; 
    BEGIN FOR r IN ( 
    SELECT view_group_by_shipday_filter.shipday AS shipday, 
    sum(view_group_by_shipday_filter.delivered) AS delivered, 
    sum(view_group_by_shipday_filter.transit) AS transit, 
    sum(view_group_by_shipday_filter.refused) AS refused, 
    sum(view_group_by_shipday_filter.undeliverable) AS undeliverable, 
    sum((view_group_by_shipday_filter.undeliverable + view_group_by_shipday_filter.refused)) AS total_exceptions FROM view_group_by_shipday_filter 
    WHERE (carriercode IS NULL OR view_group_by_shipday_filter.carriercode = carriercode) AND (shipdate IS NULL OR DATE(view_group_by_shipday_filter.shipdate) = shipdate) 
    GROUP BY view_group_by_shipday_filter.shipday ) 
    LOOP RETURN NEXT r; 
    END LOOP; 
    RETURN; 
    END; 
$$ LANGUAGE plpgsql;

当我在没有跟踪的情况下在 hasura 中运行它时它会执行但是当我跟踪它时它会给出错误

Inconsistent object: in function "get_shipment_data": 
the function "get_shipment_data" cannot be tracked for the following reasons: 
• the function does not return a "COMPOSITE" type 
• the function does not return a table

上下文：我从一个基表创建了这个视图

view_group_by_shipday_filter

，该基表按

carriercode

、

shipdate

和

shipday

分组。我必须在组中添加

carriercode

、

shipdate

因为我会基于它们进行过滤。我原以为它会在视图中给我独特的

shipday

，但它正在创建重复的

shipday

。 这就是为什么我试图在

function

之上创建一个

view

，以便在必要时应用过滤器并仅按

shipday

分组，这样我就可以获得独特的

shipday

.

我还在学习 postgres 函数，一般来说是 postgres。在这里停留了一段时间，我们将不胜感激。