Tuning the query : Very Urgent

Question

Hi
We have query wich needs tuning.when we are putting REGULAR EXPRESSION query is running fine but whne we put like LIKE stmt it is taking time.Here is the query below.Please help on tuning.
SELECT a.order_number, b.last_update_date,TO_CHAR( b.split_percent,'FM99999.009') SPLIT_PERCENTAGE,
rs.NAME " SALES_PERSON_NAME ", rs.salesrep_number, b.effective_date,
b.creation_date "CREATION_DATE", rt.NAME "TERRITORY_NAME",
rt.segment1 "ERP_CODE", a.booked_date "DATE_BOOKED",
TO_CHAR(ROUND((( (SELECT SUM (ordered_quantity * unit_selling_price)
FROM apps.oe_order_lines_all ol
WHERE ol.header_id = a.header_id)
* b.split_percent
/ 100
) , 2),'FM99999999999999999999.009') order_total ,
(SELECT user_name
FROM fnd_user
WHERE user_id = b.last_updated_by) requested_by,
b.obsolete_date
FROM oe_order_headers_all a,
apps.csm_header_sales_cr_hist b,
jtf_rs_salesreps rs,
ra_territories rt
WHERE 1 = 1
AND a.header_id = b.source_header_id
AND b.territory_id = rt.territory_id
AND b.salesrep_id = rs.salesrep_id
AND b.source_type = 'O'
AND a.order_number IN (
SELECT a.order_number
FROM oe_order_headers_all a,
apps.csm_header_sales_cr_hist b,
jtf_rs_salesreps rs,
ra_territories rt
WHERE 1 = 1
AND a.header_id = b.source_header_id
AND b.territory_id = rt.territory_id
AND b.salesrep_id = rs.salesrep_id
AND b.source_type = 'O'
-- AND b.obsolete_date IS NULL --ommented by andondap as per TD#9648 Changes
AND  REGEXP_LIKE ( rs.name , '(svc)|(Muti.*Y)|(Multi.*Y)|(._MY)')  Commented by andondap as per TD#9648 Changes
AND b.last_update_date BETWEEN TO_DATE ('2012/11/25', 'YYYY/MM/DD') AND TO_DATE ('2013/03/23', 'YYYY/MM/DD')+ 0.9999
AND REGEXP_LIKE ( rs.name,'(.MY)|(Muti.*Y))|(Multi.*Y)|(._MY) |(mlti)')
AND rs.name LIKE '%SVC%MULTI%' OR rs.name NOT LIKE '%DUMMY%' OR rs.name LIKE 'Svc%Multi%' OR rs.name LIKE 'Svc%MY%'
OR rs.name LIKE 'Service%Multi%' OR rs.name LIKE '%MY_SHARE_TM' OR rs.name LIKE '%MY_SHARE_T')
ORDER BY a.order_number, b.creation_date
Thanks
Hibin

Answer 1

Hmmm, let's see...
1. OP provided formatted code using {noformat}{noformat} tags.... - FAILED
2. OP provided database version in full... - FAILED
3. OP provided table structures and index information... - FAILED
4. OP provided cardinality and selectivity information... - FAILED
5. OP provided explain plans... - FAILED
6. OP provided execution traces... - FAILED
7. OP is a new member and can be excused for above failures... - FAILED
8. OP has asked previous questions and followed forum etiquette by marking them as answered... - FAILED
9. OP has respected volunteers and other questioners by not marking his question as Urgent... - FAILED
10. OP has read the forum FAQ ({message:id=9360002}) for posting his question...  - FAILED
11. OP has read the forum FAQ ({message:id=9360003}) for posting a tuning question... - FAILED
It's a good job you're not a computer program, you wouldn't have even compiled.
so, points to note:
This is a forum of volunteers.  There's no such thing as an Urgent question here, and it's considered rude to suggest your question is urgent, as that indicates you want immediate attention from the people who are giving up their own time to help, and who have their own jobs to do.  It's also rude for the other people who are asking questions, as everyone would like an answer to their problem as soon as possible, so what makes you any more special?  An urgent issue is one where a live system is down potentially putting people's lives at risk or causing a company to lose money, or somehow damage their services.  Such issues should be logged with Oracle Support, not on the free OTN forums.
Next, when you post your question, ensure you provide all the information that is needed for people to be able to help you.  Read the FAQ posts which point to useful threads indicating what information is required, especially for tuning requests.
Finally, when your questions have been answered, it is common courtesy to mark them as answered (and award points if appropriate), otherwise it indicates that you have no respect for the people who are helping you.
If you follow all the advice above, you will end up creating a good question that people will be willing to help you with.   If you don't follow the advice above, such as in this question you've posted, you will find that few experts will bother to help (or if they post it will not likely be helpful advise you receive).  The choice is yours.