A ad-hoc query tuning

Question

Hi,
I have a ad-hoc query generated by OBIEE like below , in production, it runs 4 minture, then start to fetch rows, in staging it runs
284019 rows selected.
Elapsed: 00:27:15.26
--so is there any way to shorten time? thanks
select /*+ result_cache */ SUBSTR(OC.RECALL_DATE, 5,2) || '/' ||
SUBSTR(OC.RECALL_DATE, 7,2) || '/' ||
SUBSTR(OC.RECALL_DATE, 0,4) as created_Date,
SUBSTR(AF.FINAL_BILL_DATE, 5,2) || '/' ||
SUBSTR(AF.FINAL_BILL_DATE, 7,2) || '/' ||
SUBSTR(AF.FINAL_BILL_DATE, 0,4) || ' - B'as bill_Date,
SUBSTR(AF.WRITEOFF_DATE, 5,2) || '/' ||
SUBSTR(AF.WRITEOFF_DATE, 7,2) || '/' ||
SUBSTR(AF.WRITEOFF_DATE, 0,4) ||' - W' as writeoff_Date,
RF.REGION_DESCRIPTION,
RL.RISK,
DA.ACCOUNT_TYPE_DESC,
C.CATEGORY_DESC,
DR.DISCONNECT_REASON||' - '||DISCONNECT_REASON_DESC||' - DR' ,
S.STATE_CODE,
ST.STATUS_DESC,
--LOB.LOB_FINALS_DESC||' - LOB',
AT.U_FINALS_STATUS_DESCRIPTION,
RC.OCA_REFERRAL_TYPE_DESC,
DO.U_Agency_Status,
DO.oca_parent_cd||'-'||oca_parent_desc,
RR.OCA_REFERRED_REASON_DESC,
CASE WHEN CR.CREDIT_REPORT_CODE in ('1','2','3','4','N','E', 'O','V','6','7') then CR.CREDIT_REPORT_CODE||' - '||CR.CREDIT_REPORT_DESC ELSE '0 - UNKNOWN' END,
CL.U_COLLECTOR_CODE,
-- Enhancement of May release for WR 60615RC2 A2R
case when AF.RECORDSTATUSIND='A2R' then 'Yes - A2R' else 'No - A2R' end as A2R_Status,
COUNT(distinct AF.ACCOUNT_ID) AS no_of_accounts,
SUM(OC.RECALL_AMOUNT) AS amount
FROM
T_AGG_CANRET_BS BS,
F_OCA_REFERRED OC,
D_ACCOUNT_FINALS AF,
D_DATE D,
D_REGION_FINALS RF,
D_CREDIT_CLASS RL,
D_DISCONNECT_REASON DR,
D_CATEGORY C,
D_STATE S,
V_D_ACCOUNT_STATUS_FINAL ST,
V_D_FINALS_ACCOUNT_STATUS AT,
D_ACCOUNT_TYPE DA,
D_OCA_REFERRAL_TYPE RC,
V_D_OCA DO,
D_OCA_REFERRED_REASON RR,
D_CREDIT_REPORT CR,
V_D_COLLECTOR CL
-- D_LOB_FINALS LOB
WHERE
OC.SOURCE_BILL_SUMMARY_ID=BS.BILL_SUMMARY_ID_FINALS AND
BS.ACCOUNT_ID=AF.ACCOUNT_ID AND
AF.REGION_ID=RF.REGION_ID AND
OC.RECALL_DATE=D.DATE_ID AND
AF.RISK=RL.CREDIT_CLASS_ID AND
AF.LOB_ID=DA.ACCOUNT_TYPE_ID AND
BS.CATEGORY_ID=C.CATEGORY_ID AND
AF.DISCONNECT_REASON_ID=DR.DISCONNECT_REASON_ID AND
AF.STATE_ID=S.STATE_ID AND
-- AF.LOB_ID_FINALS=LOB.LOB_FINALS_ID AND
AF.BILL_STATUS_ID=ST.ACCOUNT_STATUS_ID AND
AF.ACCOUNT_STATUS_ID=AT.FINALS_ACCOUNT_STATUS_ID AND
RC.OCA_REFERRAL_TYPE_ID=OC.OCA_REFERRAL_TYPE_ID AND
DO.OCA_TIER_ID=OC.OCA_TIER_ID AND
RR.oca_referred_reason_code=OC.RECALL_REASON_ID AND
CR.CREDIT_REPORT_ID=AF.CREDIT_REPORT_ID AND
CL.COLLECTOR_ID=OC.COLLECTOR_ID AND
OC.RECALL_DATE > 19000101 AND
UPPER(RR.OCA_ACTION)='RECALL' AND
CL.COLLECTOR_CODE <> 'FINAL_SYS_COL'
---AND BS.LAST_QTS_UPD_DT > to_char(trunc(sysdate)-7,'YYYYMMDD')
--AND CR.CREDIT_REPORT_CODE= CASE WHEN CR.CREDIT_REPORT_CODE in ('1','2','3','4','N','E','V','6','7') then CR.CREDIT_REPORT_CODE ELSE 'O' END
GROUP BY
SUBSTR(OC.RECALL_DATE, 5,2) || '/' ||
SUBSTR(OC.RECALL_DATE, 7,2) || '/' ||
SUBSTR(OC.RECALL_DATE, 0,4) ,
SUBSTR(AF.FINAL_BILL_DATE, 5,2) || '/' ||
SUBSTR(AF.FINAL_BILL_DATE, 7,2) || '/' ||
SUBSTR(AF.FINAL_BILL_DATE, 0,4) || ' - B',
SUBSTR(AF.WRITEOFF_DATE, 5,2) || '/' ||
SUBSTR(AF.WRITEOFF_DATE, 7,2) || '/' ||
SUBSTR(AF.WRITEOFF_DATE, 0,4) ||' - W' ,
RF.REGION_DESCRIPTION,
RL.RISK,
DA.ACCOUNT_TYPE_DESC,
C.CATEGORY_DESC,
DR.DISCONNECT_REASON||' - '||DISCONNECT_REASON_DESC||' - DR',
S.STATE_CODE,
ST.STATUS_DESC,
-- LOB.LOB_FINALS_DESC||' - LOB',
AT.U_FINALS_STATUS_DESCRIPTION,
RC.OCA_REFERRAL_TYPE_DESC,
DO.U_Agency_Status,
DO.oca_parent_cd||'-'||oca_parent_desc,
RR.OCA_REFERRED_REASON_DESC,
CASE WHEN CR.CREDIT_REPORT_CODE in ('1','2','3','4','N','E', 'O','V','6','7') then CR.CREDIT_REPORT_CODE||' - '||CR.CREDIT_REPORT_DESC ELSE '0 - UNKNOWN' END,
CL.U_COLLECTOR_CODE,
-- Enhancement of May release for WR 60615RC2 A2R
case when AF.RECORDSTATUSIND='A2R' then 'Yes - A2R' else 'No - A2R' end;

Answer 1

jerrygreat wrote:
Hi,
I have a ad-hoc query generated by OBIEE like below , in production, it runs 4 minture, then start to fetch rows, in staging it runs
284019 rows selected.
Elapsed: 00:27:15.26
--so is there any way to shorten time? thanks
select /*+ result_cache */ SUBSTR(OC.RECALL_DATE, 5,2) || '/' ||
SUBSTR(OC.RECALL_DATE, 7,2) || '/' ||
SUBSTR(OC.RECALL_DATE, 0,4) as created_Date,
SUBSTR(AF.FINAL_BILL_DATE, 5,2) || '/' ||
SUBSTR(AF.FINAL_BILL_DATE, 7,2) || '/' ||
SUBSTR(AF.FINAL_BILL_DATE, 0,4) || ' - B'as bill_Date,
SUBSTR(AF.WRITEOFF_DATE, 5,2) || '/' ||
SUBSTR(AF.WRITEOFF_DATE, 7,2) || '/' ||
SUBSTR(AF.WRITEOFF_DATE, 0,4) ||' - W' as writeoff_Date,<snip>
OC.RECALL_DATE > 19000101 AND<snip>
GROUP BY
SUBSTR(OC.RECALL_DATE, 5,2) || '/' ||
SUBSTR(OC.RECALL_DATE, 7,2) || '/' ||
SUBSTR(OC.RECALL_DATE, 0,4) ,
SUBSTR(AF.FINAL_BILL_DATE, 5,2) || '/' ||
SUBSTR(AF.FINAL_BILL_DATE, 7,2) || '/' ||
SUBSTR(AF.FINAL_BILL_DATE, 0,4) || ' - B',
SUBSTR(AF.WRITEOFF_DATE, 5,2) || '/' ||
SUBSTR(AF.WRITEOFF_DATE, 7,2) || '/' ||
SUBSTR(AF.WRITEOFF_DATE, 0,4) ||' - W' ,Like others I had issues with the formatting, you should fix that. I've a question and a suggestion
1) You use the result cache hint (on an ad-hoc query!!? but never mind?) Perhaps it runs in prod in 27 mins the first time and then 4 mins.
2) Make your dates use the date datatype. Then you can avoid the horrible functions where they hurt and make things clearer.
Otherwise you'll need to post the usual formatted using {code tags} execution plans from both prod and dev.