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  2. RPG400-L
  3. December 2007

RE: RPG Cycle (was Multi-Occurring DS)

James,

Correct. But that would probably be a service or update program
intended to conditionally affect all of the records in a file. Most
activity programs are designed to only address the records of interest
to the program. Reading all of the records in a file to determine valid
criteria is unnecessary with valid keys and/or SQL.

Tom Armbruster

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of James Lampert
Sent: Wednesday, December 19, 2007 2:11 PM
To: RPG programming on the AS400 / iSeries
Subject: Re: RPG Cycle (was Multi-Occurring DS)

Armbruster, Tom wrote:
Eric,

I agree with your methodology. With a normalized database,
appropriately keyed files and valid logic, there should never be a
reason to read every record in a file.

. . . Unless you need to perform some operation on every single record.
Or you need to make a decision on whether the operation is appropriate
based on some criterion other than a key.


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