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  1.  Home
  2. RPG400-L
  3. January 2008

RE: Checking for dupe key on WRITE

And if there is, and you didn't check for it and/or monitor for you, you're
spending lots of time answering phonecalls! :)

cpu cycles for a pre-check are the least of my wories.


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]On Behalf Of DeLong, Eric
Sent: Wednesday, January 09, 2008 4:46 PM
To: RPG programming on the AS400 / iSeries
Subject: RE: Checking for dupe key on WRITE


Only if there is an actual collision.... If no collision, then
the pre-check on every write would be 100% wasted time....

Eric

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]On Behalf Of James Lampert
Sent: Wednesday, January 09, 2008 4:42 PM
To: RPG programming on the AS400 / iSeries
Subject: Re: Checking for dupe key on WRITE


Bradley V. Stone wrote:

In a worst case scenario, yes. But that doesn't mean you
should only use
the duplicate key error and NOT check for existance before
blindly writing a
record.

Indeed. A key collision uses up significantly more system time and
resources than pre-checking.



--
James H. H. Lampert
Touchtone Corporation

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