Postgres function returns ERROR of no destination - postgresql

Question

Here is my function for my DB:
create function calculate_metrics()
returns table
(
fail_count int,
hold_pay_count int
)
as
$$
declare
total_count int;
fail_count int;
hold_pay_count int;
begin
select count(1) as total_count,
sum(case when status = 'FAIL' then 1 else 0 end) as fail_count,
sum(case when status = 'HOLD_PAY' then 1 else 0 end) as hold_pay_count
from bundle where updated_at > (now() - interval '1 day');
if total_count > 0
then
return query select fail_count, hold_pay_count;
end if;
end;
$$ language plpgsql;
When I'm trying to get select calculate_metrics(), I'm getting the error:
SQL Error [42601]: ERROR: query has no destination for result data
Suggestion: If you want to discard the results of a SELECT, use PERFORM instead.
Where: PL/pgSQL function calculate_metrics() line 10 at SQL statement
The function is successfully create, and I have already insert data which consists the conditions of the requests. Where is my mistake?

Answer 1

Naming the column is not enough, you need to save the output into your variables
select count(1) as total_count,
sum(case when status = 'FAIL' then 1 else 0 end) as fail_count,
sum(case when status = 'HOLD_PAY' then 1 else 0 end) as hold_pay_count
INTO total_count, fail_count, hold_pay_count
from bundle where updated_at > (now() - interval '1 day');