After analyze report run slowly!!

Question

Dear all,
please help me how is it happen
I run this in sql
DBMS_Stats.Gather_Schema_Stats('user');
and i expect the performance will be better than before but the real world the report was tak 30 sec it take now 15 minute (not all report but tow only)
i want to resolve this problem
thanx

Answer 1

still report is slowly but now i put the query and execution plan may be I have to modify the query
-----the query is-----------
SELECT
W.ORG, W.BRN, W.GDEPT, W.SITE, W.DIV, W.BRD,
W.MGR,
W.RESERVDATE,
W.BOOKEDBY,
W.REPDUR,
W.RESERVNO RESERVNO,
SUBSTR(W.RESERVNO, 1, 1) RESORD,
W.CUSTNAME,
W.PHONE,
W.MDL,
W.REGNO,
W.SERVICE,
W.REPAIRDESC,
W.APPOINTMENT,
W.TEAM,
W.ARRTIME,
W.COLTIME,
W.JOBNO,
W.DELY,
W.READYTIME,
W.DELVTIME,
W.CANCELTIME,
DECODE(W.STATUS,'A','Active','C','Cancel',w.status) Status,
S.ENAME SERVKM,
T.DES,
-- C.COM_TY_CODE COM_CAT,
RC.COMP_CODE COMP_CODE,
CA.COM_TY_CODE C_CAT,
RC.REMARK,
'WWW' W
FROM WS_WORK_LOADING W, WS_RESERV_COMPLAINTS RC, CC_SERVICES S, WS_TEAMS T, WS_COMPLAINTS CA
WHERE
RC.COMP_CODE = CA.COM_CODE(+)
AND W.ORG = RC.ORG(+)
AND W.BRN = RC.BRN(+)
AND W.SITE = RC.SITE(+)
AND W.GDEPT = RC.GDEPT(+)
AND W.RESERVNO = RC.RESERVNO(+)
--SERVICE || W_LOADING
AND S.BRD(+) = W.BRD
AND S.DIV(+) = W.DIV
AND S.DOP_CODE(+) = W.SERVICE
AND S.MDL(+) = W.MDL
AND S.MGR(+) = W.MGR
--W_LOADING || TEAMS
AND W.ORG = T.ORG
AND W.BRN = T.BRN
AND W.GDEPT = T.GDEPT
AND W.SITE = T.SITE
AND W.TEAM = T.CODE
-- PARAMETERS
AND W.ORG = :P_ORG
AND W.BRN = :P_BRN
AND W.GDEPT = :P_GDEPT
AND W.SITE = :P_SITE
AND(
APPOINTMENT BETWEEN TO_DATE(:P_FROM_H,'DD-MM-YYYY HH12-MI AM') AND TO_DATE(:P_TO_H,'DD-MM-YYYY HH12-MI AM')
OR(
(W.ORG, W.BRN, W.SITE,W.JOBNO) IN (SELECT JB.ORG,JB.BRN,JB.SITE,JB.JOBNO FROM WS_JOBS JB WHERE JB.JST_TYP='1' AND SUBSTR(JB.RESERVNO,1,1) = 'N')
AND (APPOINTMENT BETWEEN TO_DATE(:P_FROM_H,'DD-MM-YYYY HH12-MI AM') AND TO_DATE(:P_TO_H,'DD-MM-YYYY HH12-MI AM') AND DELVTIME IS NULL AND STATUS <> 'C')
OR (DELVTIME BETWEEN TO_DATE(:P_FROM_H,'DD-MM-YYYY HH12-MI AM') AND TO_DATE(:P_TO_H,'DD-MM-YYYY HH12-MI AM'))
AND (APPOINTMENT BETWEEN TO_DATE(:P_FROM_H,'DD-MM-YYYY HH12-MI AM') AND TO_DATE(:P_TO_H,'DD-MM-YYYY HH12-MI AM')) --*******
OR (APPOINTMENT BETWEEN TO_DATE(:P_FROM_H,'DD-MM-YYYY HH12-MI AM') AND TO_DATE(:P_TO_H,'DD-MM-YYYY HH12-MI AM') )
AND CANCELTIME BETWEEN TO_DATE(:P_FROM_H,'DD-MM-YYYY HH12-MI AM') AND TO_DATE(:P_TO_H,'DD-MM-YYYY HH12-MI AM')
ORDER BY
SUBSTR(RESERVNO, 1, 1) DESC,
TO_CHAR(W.APPOINTMENT,'yyyymmdd') DESC ,
TO_CHAR(W.APPOINTMENT,'HH12:MI AM')
----------end of query----------------------
and the executio plan is
Step     Description
1     Rows were retrieved using the index WL_SIT_FK_INDXX
2     Rows from table WS_WORK_LOADING were accessed using rowid got from an index
3     Rows were retrieved by performing a sequential read of all index records in W_D_O_INDX3
4     Rows were retrieved using the unique index OP_PK
5     For each row retrieved by step 3, the operation in step 4 was performed to find a matching row
6     VIEW PUSHED PREDICATE was performed on CC_SERVICES
7     For each row returned by step 2 get the matching row from step 6 If there are not matching rows from step 6 return nulls for those columns
8     Rows were retrieved using the unique index TM_PK
9     Rows from table WS_TEAMS were accessed using rowid got from an index
10     For each row retrieved by step 7, the operation in step 9 was performed to find a matching row
11     Rows were retrieved using the index WS_RESERV_COMP_PK
12     Rows from table WS_RESERV_COMPLAINTS were accessed using rowid got from an index
13     For each row returned by step 10 get the matching row from step 12 If there are not matching rows from step 12 return nulls for those columns
14     Rows were retrieved using the unique index WS_COMPLAINTS_PK
15     Rows from table WS_COMPLAINTS were accessed using rowid got from an index
16     For each row returned by step 13 get the matching row from step 15 If there are not matching rows from step 15 return nulls for those columns
17     Rows were retrieved using the unique index JOB_PK
18     Rows from table WS_JOBS were accessed using rowid got from an index
19     For the rows returned by step 16 filter out rows depending on the results returned by step 18
20     The results where sorted to support the ORDER BY clause
21     Rows were returned by the SELECT statement
many thanx