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When does Rushmore Optimize?
Message
De
03/11/1998 22:04:35
 
 
À
03/11/1998 11:10:12
Paul Harker
Harker Enterprises, Inc.
Idaho Falls, Idaho, États-Unis
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Divers
Thread ID:
00153608
Message ID:
00154201
Vues:
20
>I called MS on the join speed issue back on VFP 3.0. The issue is when you perform a join, EVERY record is checked against EVERY record in EVERY database involved in the join. If you are checking against more than 2 databases, the join gets longer expodentially be each additional database. I still code all my join/datacross checking functions because they are ALWAYS faster than a join. My .02


That's not really true. Rushmore will use any index available and will only look at each record when no index matches the condition AND Rushmore determines that it doesn't need to build a temporary index. See the Rushmore document on my web page for more information.
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer
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