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Strtran() in SQL where clause
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À
28/08/2002 09:18:23
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivie
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00694135
Message ID:
00694424
Vues:
13
>>Hello,
>>
>>I have an SQL query where I need to use strtran() in the where clause:
>>WHERE STRTRAN(cname,' ','') = MyVar
>>
>>This slows down the process a lot!
>>Is it possible to optimize this query? I have alrdady an index on STRTRAN(cname,' ',''), but this does not change the performance.
>>
>>Any help is highly appreciated!
>
>An index on strtran(...) is virtually useless, since it is of variable length. Any decent VFP index has a fixed length. Perhaps padr(strtran(...)) will achieve better results.
>
>Hilmar.

Thanks, this is a good explanation for the reason why this index did not work. I did not know this!
Christian Isberner
Software Consultant
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