Poor performance: portal report using inline views

Question

I have created a portal report that uses inline views that performs terribly. It has 6 inline views. When I cut out half the views, the performance doubles. When I run the same query in sql + on my portal database with all the views, I get the results back instantly. Any ideas on what is causing the performance hit in portal? Any ideas on a remedy?

Answer 1

More info
SELECT patch_no, count(*) frequency
FROM users_requests
WHERE patchset IN (SELECT arps2.patchset_name
FROM aru_bugfix_relationships abr, aru_bugfixes ab, aru_status_codes ac,
aru_patchsets arps, aru_patchsets arps2
WHERE arps.patchset_name = '11i.FIN_PF.E'
AND abr.bugfix_id = ab.bugfix_id
AND arps.bugfix_id = ab.bugfix_id
AND abr.relation_type = ac.status_id
AND arps2.bugfix_id = abr.related_bugfix_id
AND abr.relation_type IN (601, 602))
AND included ='Y'
GROUP BY patch_no
order by frequency desc, patch_no
Runs < 1 sec from SQL navigator and from portal (if i hardcode the value for fampack.
Takes ~50 secs if i replace with :fampack and set default value to 11i.FIN_PF.D