I'm having a bit of trouble with the EXECUTE statement for the following function.
I saw a lot of traffic re. plpgsql & variable substitution for 8.4, but I'm convinced this is something simple (newbie):
CREATE FUNCTION topmixtot (int[]) RETURNS SETOF record AS $$
DECLARE
gids ALIAS FOR $1;
tmpcnt int[];
totalcnt integer;
row topmixtot%ROWTYPE;
BEGIN
IF (gids IS NULL) THEN
tmpcnt := array(SELECT sum(t2.cnt) FROM inst_grant t1, topics_given_grant t2 where t1.gid=t2.gid);
ELSE
tmpcnt := array(SELECT sum(cnt) FROM topics_given_grant WHERE gid = ANY ( gids ));
END IF;
totalcnt := tmpcnt[0];
FOR row IN EXECUTE 'SELECT topics_given_grant.tid, ( 100 * (sum(cnt) / totalcnt ))::numeric as sumcnt FROM topics_given_grant, inst_grant WHERE inst_grant.gid=topics_given_grant.gid group by topics_given_grant.tid order by sumcnt DESC' LOOP
RETURN NEXT row;
END LOOP;
END;
$$ LANGUAGE plpgsql;
ERROR msg.:
db=# select count(*) from topmixtot('{5}') AS foo(tid int, cnt int);
QUERY: SELECT topics_given_grant.tid, ( 100 * (sum(cnt) / totalcnt ))::numeric as sumcnt FROM topics_given_grant, nih_grant WHERE nih_grant.gid=topics_given_grant.gid group by topics_given_grant.tid order by sumcnt DESC
CONTEXT: PL/pgSQL function "topmixtot" line 13 at FOR over EXECUTE statement
How do I substitute in the value for 'totalcnt' in the EXECUTE SELECT statement?
