爲什麼我的plpgsql函數沒有返回行

Question

當兩個查詢獨立運行用戶時我得到的結果300和0但是在我的函數中我沒有返回行。

我正在從SQL Server遷移到PostgresSQL，所以有些東西對我來說有點陌生！

create or replace function getsummary(userid int) 
returns table (assetTotal numeric, liabilityTotal numeric) 
as $$ 
BEGIN 

SELECT sum(t.credit) - sum(t.debit) 
into assetTotal 
    from transactions t 
    join user_institutes i on t.user_institute_id = i.id 
    where i.account_type in (1,3,4,5) 
    and i.user_id = userid; 

    select sum(t.credit) - sum(t.debit) 
    into liabilityTotal 
    from transactions t 
    join user_institutes i on t.user_institute_id = i.id 
    where i.account_type in (2,8,10) 
    and i.user_id = userid; 
END 
$$ language plpgsql; 

select * from getsummary(1) 

非常感謝

Answer 1

不深找你的疑問，只是指出缺少的一部分。嘗試？：

create or replace function getsummary(userid int) 
returns table (assetTotal numeric, liabilityTotal numeric) 
as $$ 
DECLARE 
_assetTotal numeric; 
_liabilityTotal numeric; 
BEGIN 

SELECT sum(t.credit) - sum(t.debit) 
into _assetTotal 
    from transactions t 
    join user_institutes i on t.user_institute_id = i.id 
    where i.account_type in (1,3,4,5) 
    and i.user_id = userid; 

    select sum(t.credit) - sum(t.debit) 
    into _liabilityTotal 
    from transactions t 
    join user_institutes i on t.user_institute_id = i.id 
    where i.account_type in (2,8,10) 
    and i.user_id = userid; 
    return query select _assetTotal, _liabilityTotal; 
END 
$$ language plpgsql;