Hey Ya’ll,
I’m a little puzzled by the speed of the stored procedures I am writing.
Here is the query alone in pgAdmin
select distinct featuretype from gnis_placenames where state='CT'
TIME: 312+16ms
Here is a stored procedure
create or replace function getfeaturetypes(text) returns setof text as $$
select distinct featuretype from gnis_placenames where state=$1;
$$ language sql;
TIME: 2391+15ms
Now if I hardcode the stored procedure with the input
create or replace function getfeaturetypes(text) returns setof text as $$
select distinct featuretype from gnis_placenames where state=’CT’;
$$ language sql;
TIME: 312+16ms
I also tried plPgsql
CREATE OR REPLACE FUNCTION getfeaturetypes(text) returns setof text as $$
declare r record;
begin
for r in SELECT featuretype as text from gnis_placenames where state=$1 group by featuretype order by featuretype asc
LOOP
return next r.text;
END LOOP;
return;
end;
$$ language plpgsql;
grant execute on function getfeaturetypes(text) to tzuser;
TIME: 2609+16ms
What gives? How can I speed up this stored procedure?
-Scott