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Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Titre:
Speeding up a lookup with a large character field
I have a cursor that contains every directory on my hard drive. Given a path, I need to find the record. Even taking a chance by limiting the field to 240 characters so I can SEEK instead of LOCATE, it's still unacceptably slow.
I'm wondering if it's possible to make it faster. I thought about making a smaller key field that takes the full path and condenses it into something smaller. There are a couple problems with that, though. First, I don't have any idea how to change the path into something smaller that will still be unique. Second, whatever function does the conversion, plus the SEEK after needs to be faster than just SEEKing on the path.
Anyone have any suggestions?
Thanks,
Michelle
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