Level Extreme platform
Subscription
Corporate profile
Products & Services
Support
Legal
Français
Q.: Understanding Rushmore Technology
Message
From
25/08/1999 19:17:43
 
 
To
25/08/1999 10:53:21
Pierre Richard
Méthotech Canada Limitée
Kirkland, Quebec, Canada
General information
Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Miscellaneous
Thread ID:
00257424
Message ID:
00257695
Views:
25
>Hi all,
>
>The VFP 5.0 Developer's Guide states at page 396, parag. 5, " Avoid using indexes on fields that contain only a few discrete values such as a logical field"
>

Focussing on the first half of Mr. Richard's observation (quoted above), I would like to ask UT folks:

Where is the dividing line?

In other words how many is "few"?

After I read the FPA article (subtitled "Less is more" right?), I took out some of my indexes. Now I'm about to go back and take out many more to see if I can speed up saves which are too slow without severely impacting queries.

I working with a WAG of "ten or fewer different values". For instance, I have a one byte reservation status field which contains only the values: D, A, N, R, I, O, and C. My WAG rule tells me: No Index.

What say you all?

Peter Robinson
Peter Robinson ** Rodes Design ** Virginia
Previous
Next
Reply
Map
View

Click here to load this message in the networking platform