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How much data returned
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À
04/05/2006 06:12:19
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
01118142
Message ID:
01119118
Vues:
29
>Then, without FORCE uses derivate subquery to force the STEP BY STEP good order:
>
>select cTrans_pk, step1.cUsGrlink_pk ;
>	from Trans;
>         inner join ;
>           (SELECT TEQ.cTrans_fk,cCommission_Owner_UsGrLink_fk as cUsGrlink_pk   FROM Employee_Queue_Schedules EQS ;
>              inner join Trans_Employees_Queues TEQ;
>                    on TEQ.cTrans_Employees_Queues_pk = EQS.cTrans_Employees_Queues_fk
>              WHERE EQS.iActive_Flag = 1 and EQS.tScheduled_time < {^2006-05-03 00:00:00};
>                 AND TEQ.iActive_flag = 1) step1 ;
>         on Trans.cTrans_pk = step1.cTrans_fk ;
>    where Trans.cResolution_Codes_fk is Null
>
>
>
3 seconds after re-loading VFP

select cTrans_pk, step1.cUsGrlink_pk from Trans inner join (SELECT TEQ.cTrans_fk,cCommission_Owner_UsGrLink_fk as cUsGrlink_pk FROM Employee_Queue_Schedules EQS inner join Trans_Employees_Queues TEQ on TEQ.cTrans_Employees_Queues_pk = EQS.cTrans_Employees_Queues_fk WHERE EQS.iActive_Flag = 1 and EQS.tScheduled_time < {^2006-05-03 00:00:00} AND TEQ.iActive_flag = 1) step1 on Trans.cTrans_pk = step1.cTrans_fk where Trans.cResolution_Codes_fk is Null into cursor curTest
Using index tag Tschedtime to rushmore optimize table eqs
Rushmore optimization level for table eqs: partial
Rushmore optimization level for table teq: none
Joining table eqs and table teq using index tag Cempque_pk
Using index tag Crescod_fk to rushmore optimize table trans
Rushmore optimization level for table trans: full
Rushmore optimization level for intermediate result: none
Joining intermediate result and table trans using index tag Ctrans_pk




>with FORCE EXIST A WORKAROUND
>VFP optimize where conditions into the ON clause
>
>select cTrans_pk, cCommission_Owner_UsGrLink_fk as cUsGrlink_pk ;
>    from FORCE Employee_Queue_Schedules EQS ;
>      inner join Trans_Employees_Queues TEQ on TEQ.cTrans_Employees_Queues_pk = EQS.cTrans_Employees_Queues_fk ;
>         AND EQS.iActive_Flag = 1 and EQS.tScheduled_time < {^2006-05-03 00:00:00} ;
>        and TEQ.iActive_flag = 1 ;
>        inner join Trans on Trans.cTrans_pk = TEQ.cTrans_fk ;
>        where Trans.cResolution_Codes_fk is Null
>
select cTrans_pk, cCommission_Owner_UsGrLink_fk as cUsGrlink_pk from FORCE Employee_Queue_Schedules EQS inner join Trans_Employees_Queues TEQ on TEQ.cTrans_Employees_Queues_pk = EQS.cTrans_Employees_Queues_fk AND EQS.iActive_Flag = 1 and EQS.tScheduled_time < {^2006-05-03 00:00:00} and TEQ.iActive_flag = 1 inner join Trans on Trans.cTrans_pk = TEQ.cTrans_fk where Trans.cResolution_Codes_fk is Null into cursor curTest
Using index tag Tschedtime to rushmore optimize table eqs
Rushmore optimization level for table eqs: partial
Rushmore optimization level for table teq: none
Joining table eqs and table teq using index tag Cempque_pk
Rushmore optimization level for intermediate result: none
Using index tag Crescod_fk to rushmore optimize table trans
Rushmore optimization level for table trans: full
Joining intermediate result and table trans using index tag Ctrans_pk

Also takes 3 seconds.

I was testing with my local tables.
If it's not broken, fix it until it is.


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