RE: Optimizing File I-O in RPG IV/ I-Series

what is a case insensitive index?

Last time we had this read vs reade discussion didn't someone do a couple of
benchmarks?  I searched the archives with no success. 
 
---------------------------------
Booth Martin
http://www.martinvt.com
---------------------------------
-------Original Message-------
 
From: RPG programming on the AS400 / iSeries
Date: 11/23/05 10:07:04
To: RPG programming on the AS400 / iSeries
Subject: RE: Optimizing File I-O in RPG IV/ I-Series
 
Interesting, Joep.
 
Although it's rare I ever need to access a file by a text field, I do
recall one example where I'm taking a list of email addresses which have
"opted out" of receiving emails from us, and compare it to all the
addresses on our database so I can flag the accounts "do not email".
 
The way I handle it, since the addresses can be mixed case in our
database, is to populate a temporary file with all of the addresses in
our database converted to lower case, then compare the incoming file of
opt outs, also converted to lower case.
 
Are you telling me I could just read the incoming file in whatever case
it is in, then setLL using a case insensitive index and READE to get all
the accounts using that address, even if they were entered in a
different case from the input file ?
 
That would be swell.
 
 
>-----Original Message-----
>From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]
>On Behalf Of J.Beckeringh@xxxxxxxxxxxxxxxxxxxxxxxxxx
>Sent: Wednesday, November 23, 2005 10:21 AM
>To: RPG programming on the AS400 / iSeries
>Subject: RE: Optimizing File I-O in RPG IV/ I-Series
>
>Simple example: You can create a case insensitive index. If you do a
SETLL
>with 'FLEMING', you might get a record with a key of 'Fleming'. READE
will
>handle it for you, a simple compare won't.
>
>Joep Beckeringh
>
>
>
>
>
>
 
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