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Optimizable expressions
Message
De
10/07/2001 18:47:15
Nancy Folsom
Pixel Dust Industries
Washington, États-Unis
 
 
À
10/07/2001 15:57:14
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivie
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Divers
Thread ID:
00528859
Message ID:
00528958
Vues:
16
Hilmar-


>Remember, too, *not* to include any index on the expression deleted(); this will also return too many records.

I really enjoyed your very lucid discussion of optimization. Just a small quibble. If people have a filter on DELETED() on the PK index, then they should have an index on Deleted(). Which can cause the problems you point out.

All the more reason to use surrogate keys...one doesn't need the deleted() filter.
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