PostgreSQL PgAgent syntax error at or near DECLARE - postgresql

Question

Could someone tells me what is wrong please.
I try to create a job with using PgAgent with declaring some variables. When I run this code manually, it works successfully. But when I try to put this code in job step and save it, it throws me an error.
DO $$
DECLARE
start_date date;
dates date;
d SMALLINT;
counter integer := 0;
res date[];
treshold bigint;
BEGIN
TRUNCATE ditdemo.daily;
start_date:= now();
dates := start_date;
while counter <= 14 loop
dates := dates - INTERVAL '1 DAY';
select cal.is_holiday into d from ditdemo.calendar as cal where cal.calendardate = dates;
if d=0 then
res := array_append(res,dates);
counter := counter + 1;
end if;
/*
raise notice 'dates %', dates;
raise notice 'is holiday %', d;
raise notice 'result %', res;
*/
end loop;
insert into ditdemo.daily
select
time_bucket('1 day', j."timestamp") as day,
j.account,
count(*) as cnt
from ditdemo.jrnl as j
where
cast(j."timestamp" as date) in (select unnest(res)) AND
j.account not in (select account from ditdemo.user where is_service = 1)
group by day, j.account;
SELECT
round(PERCENTILE_CONT(0.95) WITHIN GROUP(ORDER BY d.cnt))
into treshold
FROM ditdemo.daily as d;
UPDATE ditdemo.calendar
SET daily_treshold = treshold
WHERE calendardate > start_date and calendardate <=(start_date::date + interval '7 day');
END $$;

Answer 1

It seems like PgAgent translates your code to another format, perhaps to string or something else and then can't parse it. To understand this try to:
Delete some special symbols from your code like brackets, quotes etc
Try to understand is it error from pgAgent or PostgreSQL
Good lucK!