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10.01.2005 at 01:42PM PDT, ID: 21580840
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6.2

SQL  TUNING

Asked by jkopoku in Databases Miscellaneous

Tags: , , , ,

Hello Everyone,
I have included the explain plan to this query which is taking more than 15 min to execute. The BILL table has over 90,000,000 records, and the CHARGE has over 75,000,000. I have tried to let the query use an index on the CHARGE table, but it always performs a full index scan.

Can some one please help me?

SELECT  BI.BAN ||'|'||CH.SUBSCRIBER_NO
||'|'||CH.SOC
||'|'||LTRIM(RTRIM(CH.FTR_REVENUE_CODE)) ||'|'||'&&2' ||'|'||CH.ACTV_AMT ||'|'||CH.ENT_SEQ_NO
FROM     BILL BI, CHARGE CH
WHERE  BI.BAN = CH.BAN
AND    BI.BILL_SEQ_NO = CH.ACTV_BILL_SEQ_NO
AND    CH.FTR_REVENUE_CODE IN ('R', 'U')
AND    CH.RATE_GROUP = 'P'
AND    (TO_CHAR(BI.BILL_STATUS_DATE,'YYYYMMDD')  = '&&2' OR TO_CHAR(BI.BILL_STATUS_DATE + 1,'YYYYMMDD')  = '&&2')
AND    TO_CHAR(BI.SYS_UPDATE_DATE,'YYYYMMDD') = '&&2'
AND    BI.BILL_CONF_STATUS = 'C'


Execution Plan
----------------------------------------------------------
   0      SELECT STATEMENT Optimizer=CHOOSE (Cost=40355 Card=322 Bytes
          =23506)

   1    0   NESTED LOOPS* (Cost=40355 Card=322 Bytes=23506)            :Q290100
                                                                       0

   2    1     TABLE ACCESS* (FULL) OF 'CHARGE' (Cost=27590 Card=340368 :Q290100
          0 Bytes=149761920)                                           0

   3    1     TABLE ACCESS* (BY INDEX ROWID) OF 'BILL' (Cost=2 Card=1  :Q290100
          Bytes=29)                                                    0

   4    3       INDEX* (UNIQUE SCAN) OF 'BILL_PK' (UNIQUE) (Cost=2 Car :Q290100
          d=1)                                                         0



   1 PARALLEL_TO_SERIAL            SELECT /*+ ORDERED NO_EXPAND USE_NL(A2) INDE
                                   X(A2 "BILL_PK") */ A1.C0,A1.C1,A1.C2

   2 PARALLEL_COMBINED_WITH_PARENT
   3 PARALLEL_COMBINED_WITH_PARENT
   4 PARALLEL_COMBINED_WITH_PARENTStart Free Trial
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About this solution

Zone: Databases Miscellaneous
Tags: tuning, sql, no_expand, use_nl, ordered
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Solution Provided By: Jerry_Pang
Participating Experts: 3
Solution Grade: A
 
 
 
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