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Attempting to optimize my app
Message
 
 
À
27/11/2005 09:59:23
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Versions des environnements
Visual FoxPro:
VFP 7 SP1
OS:
Windows XP SP2
Network:
Windows XP
Database:
Visual FoxPro
Divers
Thread ID:
01072106
Message ID:
01072263
Vues:
24
>Sergey, Thanks for not giving up on me. I "get it".
>
>As for the advice on adding a bunch of indexes indiscriminately, I will follow your advice of finding the slow ones and concentrating on those.
>
>I estimate there are probably no more than 20 deleted records in all the tables in my application per installation. Deletes are seldom performed. I am going to hope that means I do not need any indexes on deleted(). If that is an incorrect assumption with regard to optimization please let me know.
>
>Otherwise, I have learned a lot and I believe I have a good plan for going forward. Thanks all for the assistance.

Hi John,

The index on DELETED() is controversial topic. See http://fox.wikis.com/wc.dll?Wiki~NonDiscriminatingIndex.
Handling of indexes for deleted records also changed in VFP9. See http://msdn.microsoft.com/library/en-us/dv_foxhelp9/html/7ecc3532-d06f-42b4-b1d0-9bed677cec90.asp
--sb--
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