Select running slow in prod but work fine in T-1

Question

We have a query which run very slow on production database it is taking around 7 min to run.
While it is working fine on T-1 database which gets refreshed every night, here it takes around 3 seconds.
both the os version and database versions are same.
Database is also refreshed and have same data and statistics.
please update what could be the reason?
SELECT c.txt_master_claim_no "Master Claim No",
c.num_serial_no "Serial No",
TO_CHAR(c.dat_loss_date, 'dd / mm / yyyy') "Loss Date",
d.departmentname "Line of Business",
m.productname "Product",
tab.stat "Status"
FROM (SELECT t.num_claim_no, 'REPUDIATION' stat, num_update_no
FROM gc_clm_gen_info t, gc_clm_os a
WHERE t.num_update_no =
(SELECT MAX(p.num_update_no)
FROM gc_clm_gen_info p
WHERE p.num_claim_no = t.num_claim_no)
AND t.txt_claim_status = 'X'
AND a.cur_os_amount = 0
AND a.num_ac_year * 100 + a.num_ac_month =
(select max(s.num_ac_year * 100 + s.num_ac_month)
from gc_clm_os s
where s.num_claim_no = a.num_claim_no)
AND t.num_claim_no = a.num_claim_no
UNION
SELECT a.num_claim_no, 'DISBURSE' stat, num_update_no
FROM gc_clm_os a, gc_clm_gen_info b
WHERE a.cur_os_amount = 0
AND a.num_ac_year * 100 + a.num_ac_month =
(select max(s.num_ac_year * 100 + s.num_ac_month)
from gc_clm_os s
where s.num_claim_no = a.num_claim_no)
AND b.num_update_no >
(SELECT MAX(x.num_update_no)
FROM gc_clm_gen_info x
WHERE x.num_claim_no = b.num_claim_no
AND x.txt_claim_status in ('F', 'X'))
AND a.num_claim_no = b.num_claim_no
UNION
SELECT a.num_claim_no, 'DISBURSE' stat, num_update_no
FROM gc_clm_os a, gc_clm_gen_info b
WHERE a.cur_os_amount = 0
AND a.num_ac_year * 100 + a.num_ac_month =
(select max(s.num_ac_year * 100 + s.num_ac_month)
from gc_clm_os s
where s.num_claim_no = a.num_claim_no)
AND b.num_update_no =
(SELECT MAX(x.num_update_no)
FROM gc_clm_gen_info x
WHERE x.num_claim_no = b.num_claim_no)
AND a.num_claim_no = b.num_claim_no
And b.txt_claim_status = 'F'
and not exists
(select 1
from gc_clm_payment_details p
where p.num_claim_no = a.num_claim_no
and p.txt_status in ('APPROVAL DUE', 'APPROVED'))
) tab,
gc_clm_gen_info c,
uw_product_master m,
uw_department_master d
WHERE tab.num_claim_no = c.num_claim_no
AND c.num_update_no =
(SELECT MAX(d.num_update_no)
FROM gc_clm_gen_info d
WHERE d.num_claim_no = c.num_claim_no)
AND c.num_department_code = d.departmentcode
AND m.productcode = c.num_product_code
AND M.DEPARTMENTCODE=D.DEPARTMENTCODE
AND c.txt_claim_status NOT IN ('O', 'S')
AND c.num_update_no = tab.num_update_no
AND c.num_claim_no not in
(select p.num_claim_no
from gc_clm_payment_details p, gc_clmmst_resource_type r
where p.num_type_of_party = r.num_resource_type_cd
and r.txt_loss_exp = 'E'
and p.txt_status = 'APPROVAL DUE') and Upper(C.txt_master_claim_no) like '%C231110020345%' order by c.NUM_CLAIM_NO Desc;
Edited by: user12195658 on Mar 24, 2011 7:27 AM

Answer 1

from T-1 explain plan output is:
Explain complete.
PLAN_TABLE_OUTPUT
| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)|
| 0 | SELECT STATEMENT | | 1 | 132 | | 5862 (4)|
| 1 | SORT ORDER BY | | 1 | 132 | | 5862 (4)|
| 2 | NESTED LOOPS | | 1 | 132 | | 5853 (4)|
| 3 | NESTED LOOPS | | 1 | 97 | | 5852 (4)|
| 4 | NESTED LOOPS | | 1 | 83 | | 5851 (4)|
| 5 | VIEW | | 78 | 2574 | | 5617 (4)|
| 6 | SORT UNIQUE | | 78 | 6992 | | 5617 (78)|
| 7 | UNION-ALL | | | | | |
| 8 | FILTER | | | | | |
| 9 | HASH JOIN | | 29 | 1943 | | 1266 (5)|
| 10 | HASH JOIN | | 2895 | 115K| | 584 (5)|
| 11 | INDEX FAST FULL SCAN | IND_GC_CLM_GEN_INFO | 2437 | 43866 | | 353 (5)|
| 12 | TABLE ACCESS FULL | GC_CLM_OS | 36517 | 820K| | 229 (4)|
| 13 | VIEW | VW_SQ_1 | 43391 | 1101K| | 680 (4)|
| 14 | HASH GROUP BY | | 43391 | 1313K| 4712K| 680 (4)|
| 15 | TABLE ACCESS FULL | GC_CLM_OS | 65293 | 1976K| | 228 (4)|
| 16 | SORT AGGREGATE | | 1 | 15 | | |
| 17 | INDEX RANGE SCAN | IND_GC_CLM_GEN_INFO | 6 | 90 | | 3 (0)|
| 18 | HASH JOIN | | 76 | 6840 | | 2001 (5)|
| 19 | HASH JOIN | | 2207 | 137K| | 1338 (5)|
| 20 | HASH JOIN | | 365 | 17885 | 1256K| 1054 (4)|
| 21 | TABLE ACCESS FULL | GC_CLM_OS | 36517 | 820K| | 229 (4)|
| 22 | VIEW | VW_SQ_2 | 43391 | 1101K| | 680 (4)|
| 23 | HASH GROUP BY | | 43391 | 1313K| 4712K| 680 (4)|
| 24 | TABLE ACCESS FULL | GC_CLM_OS | 65293 | 1976K| | 228 (4)|
| 25 | INDEX FAST FULL SCAN | PK_GC_CLM_GEN_INFO | 262K| 3849K| | 276 (5)|
| 26 | VIEW | VW_SQ_3 | 30152 | 765K| | 661 (5)|
| 27 | HASH GROUP BY | | 30152 | 883K| 3336K| 661 (5)|
| 28 | INDEX FAST FULL SCAN | IND_GC_CLM_GEN_INFO | 46690 | 1367K| | 356 (6)|
| 29 | FILTER | | | | | |
| 30 | HASH JOIN | | 511 | 43435 | | 1535 (5)|
| 31 | HASH JOIN ANTI | | 337 | 22579 | | 1180 (4)|
| 32 | HASH JOIN | | 365 | 17885 | 1256K| 1054 (4)|
| 33 | TABLE ACCESS FULL | GC_CLM_OS | 36517 | 820K| | 229 (4)|
| 34 | VIEW | VW_SQ_4 | 43391 | 1101K| | 680 (4)|
| 35 | HASH GROUP BY | | 43391 | 1313K| 4712K| 680 (4)|
| 36 | TABLE ACCESS FULL | GC_CLM_OS | 65293 | 1976K| | 228 (4)|
| 37 | INDEX FAST FULL SCAN | IND_GC_CLM_PAYMENT_DETAILS | 2396 | 43128 | | 125 (6)|
| 38 | INDEX FAST FULL SCAN | IND_GC_CLM_GEN_INFO | 44253 | 777K| | 354 (5)|
| 39 | SORT AGGREGATE | | 1 | 15 | | |
| 40 | INDEX RANGE SCAN | IND_GC_CLM_GEN_INFO | 6 | 90 | | 3 (0)|
| 41 | TABLE ACCESS BY INDEX ROWID | GC_CLM_GEN_INFO | 1 | 50 | | 3 (0)|
| 42 | INDEX RANGE SCAN | PK_GC_CLM_GEN_INFO | 1 | | | 2 (0)|
| 43 | SORT AGGREGATE | | 1 | 15 | | |
| 44 | INDEX RANGE SCAN | IND_GC_CLM_GEN_INFO | 6 | 90 | | 3 (0)|
| 45 | NESTED LOOPS | | 1 | 26 | | 5 (0)|
| 46 | TABLE ACCESS BY INDEX ROWID| GC_CLM_PAYMENT_DETAILS | 1 | 21 | | 4 (0)|
| 47 | INDEX RANGE SCAN | IND_GC_CLM_PAYMENT_DETAILS | 1 | | | 3 (0)|
| 48 | TABLE ACCESS BY INDEX ROWID| GC_CLMMST_RESOURCE_TYPE | 1 | 5 | | 1 (0)|
| 49 | INDEX UNIQUE SCAN | PK_GC_CLMMST_RESOURCE_TYPE | 1 | | | 0 (0)|
| 50 | INDEX RANGE SCAN | UW_DEPARTMENT_MASTER_INDX | 1 | 14 | | 1 (0)|
| 51 | INDEX RANGE SCAN | IND_UW_PRODUCT_MASTER | 1 | 35 | | 1 (0)|
Note
- 'PLAN_TABLE' is old version
61 rows selected.