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Hi James,
That break even ratio sounds a bit excessive, but I have not tested it... I can't imagine why a DB exception would be that expensive. Do you have any documentation that describes this?
Thanks,
Eric
-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]On Behalf Of James Lampert
Sent: Wednesday, January 09, 2008 4:59 PM
To: RPG programming on the AS400 / iSeries
Subject: Re: Checking for dupe key on WRITE
DeLong, Eric wrote:
Only if there is an actual collision.... If no collision, then the
pre-check on every write would be 100% wasted time....
As I recall, the difference is so great that the break-even point, where
it becomes a good idea to pre-check, is something like 1 collision in 5
writes. Maybe even only one in ten.
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