Hello
you can use RETURN QUERY EXECUTE statement
http://www.postgresql.org/docs/9.1/interactive/plpgsql-control-structures.html#PLPGSQL-STATEMENTS-RETURNING
Regards
Pavel Stehule
2013/1/15 kgeographer <karl.geog@gmail.com>:
> I have a related problem and tried the PERFORM...EXECUTE pattern suggested
> but no matter where I put PERFORM I get 'function not found' errors.
>
> I want to loop through id values returned by a query and execute another
> with each i as a parameter. Each subquery will return 6-8 rows. This is a
> simplified example, in the real app the subquery is doing some aggregation
> work.
>
> Tried many many things including this pattern below and read everything I
> could find, but no go. Any help appreciated.
>
> ++++++++++++++++
> create or replace function getRowsA() returns setof record as $$
> declare
> r record;
> loopy record;
> i integer;
> sql text;
> begin
> for r in select * from cities loop
> i := r.id;
> sql := 'select city,topic,weight from v_doctopic where city = ' || i;
> EXECUTE sql;
> return next loopy;
> end loop;
> return;
> end;
> $$ language 'plpgsql';
>
> select * from getRowsA() AS foo(city int, topic int, weight numeric)
>
>
>
> -----
> karlg
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