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Is normal this Speed?
Message
De
07/05/2003 09:36:22
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivie
 
 
À
07/05/2003 08:57:52
Yh Yau
Ingenuity Microsystems Sdn Bhd
Kuala Lumpur, Malaisie
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00784121
Message ID:
00785759
Vues:
15
>Hilmar,
>I tested the set exact status using a single table query.
>For character field joins, off course you need to have exact on.
>But what I've discovered is that with set exact off, a query runs faster and nothing more.
>Yau

Your claims warrant some further investigation.

I just did a few tests, both with a single table and with a join of 2 tables (joined on an Integer field). In the 2-table join, I tried both keeping the tables open, and closing them before the SELECT. I noted no significant difference in speed.

I therefore suspect that you had interference from "buffering": if you repeat the query a second time, part of the table is already in RAM. I suggest you repeat the tests several times to avoid this.
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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