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Speed Difference
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08/01/2002 11:07:19
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivie
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00601821
Message ID:
00601985
Vues:
30
> ...
>The view will get ALL the records over the line, and the (again) Set Filter on the cursor will do the same as before.

Perhaps I am missing something important here: Why should the view get ALL the records? A query, or view, gets only the records you request, and is therefore quite fast. However, if you use Full Rushmore Optimization, you may sometimes get all - or most - index keys, but not the records themselves. This may typically happen if you have an index on deleted().

As soon as I changed from filtered tables to views, the corresponding forms, in my application, got significantly faster.

Hilmar.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
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