Joe,
Thank you very much. I didn't even think of casting the result of the first
loop. I will test out the function tomorrow with the cast included and let
you know how it works. From the looks of it (your results) it should work
fine.
Joe Conway Wrote:
I think you had it working when you got the unexpected return type
message, you were just calling it wrong. The data types must match
*exactly* including WITH/WITHOUT TIME ZONE. I often find it simpler when
working with date/time data types to use an explicit cast, e.g.:
-- Function: public.get_factory_ytd()
CREATE or replace FUNCTION public.get_factory_ytd() RETURNS setof record
AS '
declare
ytd_record record;
d_date record;
begin
for d_date in select distinct delivery_date from load_info_table
order by delivery_date asc loop
for ytd_record in execute
''select sum(clean_weight)/sum(dirty_weight) as tare,
''''''||d_date.delivery_date|| ''''''::date from load_info_table where
delivery_date <= ''''''||d_date.delivery_date|| '''''''' loop
return next ytd_record ;
end loop;
end loop;
return;
end' LANGUAGE 'plpgsql' VOLATILE;
test=# select * from get_factory_ytd() as (tare float8, delivery_date date);
tare | delivery_date
-------------------+---------------
0.829268292682927 | 2003-01-01
0.803571428571429 | 2003-01-02
(2 rows)
Note the ::date that I stuck in the function and how I specified
delivery_date as type "date" in the query.
HTH,
Joe
