RE: Logical file in RPG -- RPG400-L

Luke,

Please excuse me if I state what you already know, but I think you
will find you can define as many "key fields" as you want.

A physical file can have none or several key fields.
In general, physical files warrant a Primary/Unique key.
A physical file can have none or several index/logical files and/or views.
An index/logical/view can have none or several keys.

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Klugman, Luke
Sent: Thursday, April 11, 2013 8:19 AM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: RE: Logical file in RPG

Thanks for this Gene, but what if I have an additional field I want to use as the key, instead of the date...

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Gene Burns
Sent: 11 April 2013 14:36
To: RPG programming on the IBM i / System i
Subject: Re: Logical file in RPG

You could create the index over the table using the date then create a view over the table with the date selection. If I recall correctly the view would utilize the index to select the correct data.

CREATE INDEX ATABLEI1 ON ATABLE (DATE_FIELD)

CREATE VIEW ATABLEV1 ON ATABLE
WHERE DATE_FIELD >= (CURRENT DATE - 1 YEARS)
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