Hi
Only 928 records satisfy flag set ot 'Y'. Unfortuneately they have standard
edition which does not support bitmap indexes. I did create an index on
hold_payment_flag in my test database and the cost went from 3347 to 413.
Time went from 38 seconds to 1 second. I will have to see what production
does and weigh cost of adding a extra index.
Thanks
Rick
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<adary@mehish To: Multiple recipients of list ORACLE-L
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.co.il> cc:
Sent by: Subject: RE: More info on sql query
running slow
root@fatcity.
com
03/20/2002
09:38 AM
Please
respond to
ORACLE-L
Hello Rick
How many records satisfy the selection without referring to the
hold_payment_flag?
How many of those have the flag set to 'y'?
Are your indexes bitmaps or regular?
Of the top of my head I will build bitmap indexes for all the fields,
including hold_payment_flag.
Yechiel Adar, Mehish Computer Services
[EMAIL PROTECTED]
> -----Original Message-----
> From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]]
> Sent: Wed, March 20, 2002 3:58 PM
> To: Multiple recipients of list ORACLE-L
> Subject: More info on sql query running slow
>
> Hi All,
> Oracle 8.1.6
>
> I have 2 tables which have been analyzed. The query takes about 30+
> seconds
> to run. If I run it many times it is faster as data gets loaded into
> buffer
> cache. I want to optimize when that is not the case. All the fields in
> the
> query have a separate index created EXCEPT for
> ACCRUED_AND_PAID.hold_payment_flag.
>
> Phy_Contracts has 10,466 rows.
> Accrued_and_Paid has 820,919 rows.
>
> Here is output from explain plan
>
> SELECT STATEMENT Cost = 1382
> SORT AGGREGATE
> NESTED LOOPS
> TABLE ACCESS BY INDEX ROWID PHY_CONTRACTS
> INDEX RANGE SCAN PCON_CMPY_FK
> TABLE ACCESS BY INDEX ROWID ACCRUED_AND_PAID
> INDEX RANGE SCAN ADPD_PCON_FK
>
> Any ideas what I can do to speed this query.
>
> SELECT COUNT(a.phy_contract_id)
> FROM accrued_and_paid a, phy_contracts b
> WHERE a.hold_payment_flag = 'Y'
> AND b.phy_contract_id = a.phy_contract_id
> AND b.company_id = 16
> AND b.contract_type = 'IC';
>
> List of single column index on PHY_CONTRACTS
> INDEX_NAME COLUMN_NAME
> ------------------------------ ---------------------
> PCON_CONTRACT_TYPE_IDX CONTRACT_TYPE
> PCON_CMPY_FK COMPANY_ID
> PCON_PK PHY_CONTRACT_ID
>
> List of single column index on ACCRUED_AND_PAID
> INDEX_NAME COLUMN_NAME
> ------------------------------ ------------------
> ADPD_PCON_FK PHY_CONTRACT_ID
>
>
> Thanks
> Rick
>
>
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