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Optimizing replace
Message
De
01/12/2000 14:14:06
 
 
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Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Titre:
Optimizing replace
Divers
Thread ID:
00448237
Message ID:
00448237
Vues:
68
Hi all-

I am importing the results of a regression run to an existing fox table, using odbc. After I get an import cursor for use in VFP, I scan it and replace each field in the target table as I find the record, like so:

SCAN
IF INDEXSEEK(EVAL(lcSeekExpr),.T.,lcTargetTable,.cPKIndex)
REPLACE (lcTargetField) WITH EVAL(.cSourceField)
ENDIF
ENDSCAN
(the import cursor always includes the fields for the pk of the target table.)

This takes about 13 minutes for 18,000 records on my local machine. I'm wondering if I should do an SQL select and join the two tables, and then overwrite the target table with the output cursor. This might speed it up, but I'm not sure of the other implications for the data - for instance the target table could be involved in several relations. Any ideas for optimizing this would be much appreciated-

TIA-
Carlie
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