-----Original Message-----
From: ProFox [mailto:profox-boun...@leafe.com] On Behalf Of
mbsoftwaresoluti...@mbsoftwaresolutions.com
Sent: Sunday, March 18, 2018 2:34 PM
To: ProFox <profox@leafe.com>
Subject: Testing tells the tale (SYS 3054) -- "BETWEEN(a,b,c)"
equivalent to "a BETWEEN b and c"
VFP9SP2 WestWind WebConnection App on WinServer 2012
I was looking at a notoriously slow query to see about optimizing it.
Using SYS(3054,11,"cmemvar"), I was able to do so, but during my
testing, I found that using MyDate BETWEEN Arg1 and Arg1 was the same
optimization-wise as BETWEEN(MyDate,Arg1,Arg2). Somewhere in history,
I thought that using VFP's native BETWEEN(field,d1,d2) was NOT
Rushmore friendly. However, testing with SYS(3054) showed otherwise!
Just an interesting find this weekend for me whilst debugging.
Carry on!
--Mike
Also found that the ALLTRIMs in some SQLs were defeating optimization as
well. Just a tip for others here! I don't code that way but somebody
in the history of this app did.
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