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Speed Test
Message
From
02/11/2000 11:30:25
Walter Meester
HoogkarspelNetherlands
 
 
To
02/11/2000 06:59:20
General information
Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Title:
Miscellaneous
Thread ID:
00437042
Message ID:
00437158
Views:
19
Kevin,

When opening views, it matters if the underlying tables are already opened or not.

Further a view is in fact a SQL statement and even if NODATA is in effect, it still executes. When it executes it still downloads indexes needed to perform the joins. I don't know if this also applies to an DELETED() index tag. You might want to try it yourself.

Walter,


>I conducted a speed test on opening a database, some tables and some views, here were my results (from an NT Server):
>
>1 Database 1 Second
>8 Tables(some free, some from database 12 Seconds
>3 Views (with NODATA) 18 Seconds
>
>My main concern is the views, how come the views take longer to open the tables even with NODATA issued? surely they should be quicker - or is it not?
>
>Comments welcome
>Kev
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