BUG: SQL-SELECT Performance Slower in 2.5x & 2.6 Than in 2.0Last reviewed: April 18, 1995Article ID: Q117712 |
The information in this article applies to:
SYMPTOMSAn SQL-SELECT statement runs much more slowly in FoxPro versions 2.5, 2.5a, 2.5b, and 2.6 for MS-DOS than it does in FoxPro 2.0 for MS-DOS.
CAUSENot all SELECT statements will exhibit this behavior. The conditions found to reproduce this type of situation include the following:
RESOLUTIONTo work around this problem, split the SELECT statement into at least two parts. Make sure that the initial SELECT condition is the one that narrows down the results the most. In this way, you will be working with a smaller result set that can then be narrowed down even further in subsequent SELECT statements. The performance of the SELECT statements will improve significantly.
STATUSMicrosoft has confirmed this to be a problem in FoxPro versions 2.5, 2.5a, 2.5b, 2.6 for MS-DOS. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.
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Additional reference words: FoxDos 2.50 2.50a 2.50b 2.60 buglist2.50
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