postgresql 函数返回多列

Question

我对在 Postgres 中创建的函数的参数传递过程感到困惑:

create type IncorrectRecord as (pattern_number integer, uoc_number integer);

create or replace function text1(pattern text, uoc_threshold integer) 
    returns  setof IncorrectRecord
as $$
begin
return next count(v1.code) as pattern_number, count(v2.code) as uoc_number
from (select * from q1_1 where code like pattern) as v1, (select
 * from q1_1 where code like pattern and uoc > uoc_threshold) as v2;
return;
end
$$ language plpgsql;

我修改了一些，没有参数错误，但还是不行。当我用

测试它时

select * 
from test1('ECO%', 8)

error: function returns two columns.

类型有问题吗？我该如何解决？

Answer 1

正如消息所说，您将返回两列。而是返回复合类型:

return next (
    count(v1.code) as pattern_number, count(v2.code) as uoc_number
)::IncorrectRecord