为什么我的 plpgsql 函数 return 没有行

Question

当这两个查询运行独立于用户时，我得到结果 300 和 0 但是在我的函数中我没有返回任何行。

我正从 SQL 服务器迁移到 PostgresSQL 所以有些东西对我来说有点陌生！

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)

非常感谢

Answer 1

没有深入了解您的查询，只是指出缺失的部分。试试看？:

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;

为什么我的 plpgsql 函数 return 没有行

why does my plpgsql function return no rows

postgresql

plpgsql

postgresql-9.4