Connect by cause performance issue in Table Based Value Set.

Question

Hi,
In PO Requisition Distribution DFF we have added some segments.
I have a value set for party details in first segment (Attribute1) and returns the party site id (due to some dependency i cant make it return party_id).
Using the party_site_id i have to get all contact persons ( Need to Scan entire organization hierarchy to find contacts ) using organization relationship.
My Table Type Value set is written like below.
Table Name : HZ_PARTIES
Value : party_name
Id : party_id
Select party_name, party_id from hz_parties
where
party_id IN
(SELECT
  Object_id
FROM hz_relationships hr
WHERE 1                =1
AND relationship_code  = 'CONTACT'
AND subject_type       = 'ORGANIZATION'
AND subject_table_name = 'HZ_PARTIES'
AND object_type        = 'PERSON'
AND object_table_name  = 'HZ_PARTIES'
AND status             = 'A'
  START WITH object_id =
  (SELECT party_id
  FROM hz_party_sites
  WHERE party_site_id = :$FLEX$.XX_PROJ_COUNTERPART_INST
  CONNECT BY NOCYCLE PRIOR object_id = subject_id
This is working as expected but has poor performance.  It's taking around 20 sec to 1 Min based data volume. Can this be tuned?
Any help will be appreciated.
Best Regards,
Ram

Answer 1

Hi Syed,
BP is right.
Just note: The phrase "i have passed most of the primary keys in the query..." does not mean the key is used for database access: Only key field in sequence starting with the first one will result in the use of an index, I.e. if the tables index fields are A B C D E F G, use of A, AB, ABC, ... will get the index used, CDE, BCD or EFG will not use the index at all.
Regards,
Clemens