PostgreSQL: возврат функцией таблицы
Задача: вызываемая функция должна вернуть таблицу.
Решение:
DROP FUNCTION get_count_np_by_ls(date,bigint,bigint,boolean);
CREATE OR REPLACE FUNCTION public.get_count_np_by_ls(pr date, porog1 bigint, porog2 bigint, epd boolean)
RETURNS TABLE(name character varying, cnt numeric)
LANGUAGE plpgsql
AS $function$
BEGIN
if epd=true then
return QUERY
select
arname as brname,
sum(acnt) as gcnt
from (
select * from (
SELECT
areas.name as arname,
count(*) as acnt
FROM public.posting_addresses
inner join ls_addresses on ls_addresses.ls=posting_addresses.ls and ls_addresses.address_type=1 and ls_addresses.area between 1 and 26
inner join areas on areas.id=ls_addresses.area
inner join ls on ls.id=posting_addresses.ls
where
posting_addresses.period=pr and
ls.dt_cancel_epd_bill<=pr
group by areas.name,ls_addresses.city,ls_addresses.settler) as zx
where
zx.acnt between porog1 and porog2
) as res
group by brname;
else
return QUERY
select
arname as brname,
sum(acnt) as gcnt
from (
select * from (
SELECT
areas.name as arname,
count(*) as acnt
FROM public.posting_addresses
inner join ls_addresses on ls_addresses.ls=posting_addresses.ls and ls_addresses.address_type=1 and ls_addresses.area between 1 and 26
inner join areas on areas.id=ls_addresses.area
inner join ls on ls.id=posting_addresses.ls
where
posting_addresses.period=pr
group by areas.name,ls_addresses.city,ls_addresses.settler) as zx
where
zx.acnt between porog1 and porog2
) as res
group by brname;
end if;
END;
$function$
;
Вызывается так:
SELECT * from get_count_np_by_ls('2026-05-01',1,1,true)Внимание! Частой ошибкой является вызов select get_count_np_by_ls(‘2026-05-01’,1,1,true). В этом случае столбцы «схлопываются» в один
