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Rushmore does not use index
Message
De
21/12/2007 12:48:44
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Versions des environnements
Visual FoxPro:
VFP 9 SP1
OS:
Windows XP SP2
Database:
Visual FoxPro
Divers
Thread ID:
01277031
Message ID:
01277037
Vues:
19
Naomi,

Thanks for the reply.
I switched the WHERE parameters but no luck.
According to Taming Visual FoxPro's SQL page 90 though, "MY KEY" should be on the left.

(To me, it's nasty that this even matters...)

Howard

>>I cannot get Rushmore to use an index for a filtered SQL SELECT statement.
>>The result is always:
>>Using index c:\xx\xxdb\pagei.cdx tag _deleted to rushmore optimize table opendir
>>Rushmore optimization level for table opendir: partial
>>
>>I've looked at the index in the .CDX file being used and it matches my parameter.
>>Here's some info about what I'm doing.
>>I'm missing something, but what?
>>Are my non-structural indexes a problem for Rushmore?
>>I'm using VFP9 SP1.
>>
>>Thanks,
>>Howard
>>
>>My table:
>>Processor is Pentium
>>Currently Selected Table:
>>Select area: 10, Table in Use: C:\XX\XXDB\PAGE.DBF Alias: OPENDIR
>> Code page: 1252
>> CDX file: C:\XX\XXDB\PAGEI.CDX
>> Master Index tag: PAGERNAME Collate: Machine Key: UPPER(PAGERNAME)
>> Index tag: PAGERATTN Collate: Machine Key: UPPER(PAGERATTN)
>> Index tag: PAGERIVR Collate: Machine Key: UPPER(PAGERIVR)
>> Index tag: PAGERTYPE Collate: Machine Key: UPPER(PAGERTYPE)
>> Index tag: PAGERSTAT Collate: Machine Key: UPPER(PAGERSTAT)
>> Index tag: PAGERSTATD Collate: Machine Key: UPPER(PAGERSTATD)
>> Index tag: PAGERFWDNU Collate: Machine Key: UPPER(PAGERFWDNU)
>> Index tag: PAGERFWDNA Collate: Machine Key: UPPER(PAGERFWDNA)
>> Index tag: PAGERGROUP Collate: Machine Key: UPPER(PAGERGROUP)
>> Index tag: ATTNUSRDEF Collate: Machine Key: UPPER(ATTNUSRDEF)
>> Index tag: _DELETED Collate: Machine Key: DELETED()
>> Lock(s):
>>
>>My query:
>>
>>09:12:06.06 SELECT PAGERNAME, PAGERTYPE, PAGERATTN, PAGERSTAT, PAGERSTATD,
>> PAGERFWDNU, PAGERFWDNA, PAGERGROUP, PAGERIVR, ATTNUSRDEF
>> FROM openDir
>> INTO ARRAY dirArrayLocal WHERE "MY KEY" = UPPER(PAGERNAME)
>>
>>09:12:06.07 _TALLY = 1
>>09:12:06.07 CPCURRENT = 1252 CPDBF = 1252
>>09:12:06.09
>>Using index c:\xx\xxdb\pagei.cdx tag _deleted to rushmore optimize table opendir
>>Rushmore optimization level for table opendir: partial
>
>Howard,
>
>You need to start from the field on the left side.
>
>In other words, try:
>
>SELECT PAGERNAME, PAGERTYPE, PAGERATTN, PAGERSTAT, PAGERSTATD,
>             PAGERFWDNU, PAGERFWDNA, PAGERGROUP, PAGERIVR, ATTNUSRDEF
>             FROM openDir
>             INTO ARRAY dirArrayLocal  WHERE UPPER(PAGERNAME) = "MY KEY"
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