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SQL Select Optimisation changes under VFP8?
Message
De
03/06/2003 16:18:12
 
 
À
03/06/2003 15:12:49
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
00795674
Message ID:
00795893
Vues:
28
SNIP
>
>Perhaps VFP could have been designed to do what you are describing...but if you have the correct indexes, it is not relevant.

Steve,

On the premise that VFP's SQL *will* test ALL parts of an expression with ANDs, what does having the proper indexes in place have to do with preventing it or not?

I could see myself being pretty disappointed if I had some rather onerous function but knew that it would execute on less than 1% of the records because my first condition filtered out 99%+, only to learn that it ran on all records anyway.

Have I missed something here?

>
SNIP
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