RE: RPGII to RPG IV

["Forbes, Vincent" <Vincent.Forbes@xxxxxxxx>]

About twenty years ago, I converted a System 34 to a 38.  

IBM's conversion utility only created files with a "key" field & a "data"
field.  Running DFU on those files was a major pain.  

So, I created proper externally described files.  As for those multi-format
files, I created individual physical files for each format & created a
"Merge" logical to bring them back together.  

The following example the original file was called CSCHELD.  That became the
name of the logical.

      A          R RSCHELD1                  PFILE(CSCHELD1) 
      A          K LACCN                                     
      A          K LTICS                                     
       *
      A          R RSCHELD2                  PFILE(CSCHELD2) 
      A          K LACCN                                     
      A          K LTICS                                     

After that, I only changed a program to RPG III if I was going to make some
other change to it.  Internally described files don't care if the files are
externally described.



\Vincent

 -----Original Message-----
From:   rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Bob Cozzi
Sent:   December 13, 2004 4:13 PM
To:     'RPG programming on the AS400 / iSeries'
Subject:        RE: RPGII to RPG IV

Yes, but I suppose my concern is how the other programs (still in RPGII)
will react to those files once they are converted. This program is not an
island and the files are used in other areas and other applications.
Thanks
-Bob


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of M. Lazarus
Sent: Monday, December 13, 2004 3:01 PM
To: RPG programming on the AS400 / iSeries
Subject: Re: RPGII to RPG IV

Bob,

  Multi-format LF's work quite well for this purpose.  For input only, you 
can create the fields with SST().  But the beast for the long term is 
probably to separate out each format into its own PF and use the MFLF as 
the glue to bring them all together.  The MFLF would have the same name as 
the original PF.

  -mark

At 12/13/04 03:46 PM, you wrote:
>Has anyone moved an old RPGII program to RPGIII and then RPGIV in recent
>months?
>I'm specifically wondering about approaches to move the program-described
>database files to externally describd.
>Most of that is obvious, but what about multi-format files? Do people
simply
>do a rewrite of the app in that situation or is there some simpler method
to
>handle them?
>
>-Bob
>

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