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Rushmore and Index Tags
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À
15/08/2006 12:24:54
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Versions des environnements
Visual FoxPro:
VFP 8 SP1
OS:
Windows 2000 SP4
Network:
Windows 2000 Server
Database:
Visual FoxPro
Divers
Thread ID:
01145614
Message ID:
01145627
Vues:
16
Hi Dorris,

Actually I said yes for VFP commands with FOR clause which also could use Rashmore.

>Huh....ok....I sit corrected
>
>(walking off...muttering...) coulda SWORN I read that, but if Sergey say not, then....
>
>
>>It doesn't make any difference for queries if index is set or not. It does matter for VFP commands with FOR clause because they have to respect currently set index order. It may slow such commands significantly.
>>
>>>We all know that VFP uses index tags (existing or created) for Rushmore optimization, but I seem to remember that having an index tag active defeats optimization. In other words, the Fox wants to have an index available, but not used.
>>>
>>>I've been trying to remember where I read that, but it has been a few years, and I've slept since then. Does anyone else remember this?
--sb--
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