RE: Packed vs. Zoned

Patrick,

I think I remember from prior postings that RPGIV is not specifically
optimized to use packed numerics. That was a design feature of RPGIII and
prior. I don't believe that binary data types in Physical files are stored
as packed. Again, I think that's an issue with <= RPGIII that no longer
applies to RPGIV.

Eric DeLong
Sally Beauty Company
MIS-Sr. Programmer/Analyst
940-898-7863 or ext. 1863



-----Original Message-----
From: PatrickConner@parkdalemills.com
[mailto:PatrickConner@parkdalemills.com]
Sent: Tuesday, September 25, 2001 9:37 AM
To: rpg400-l@midrange.com
Subject: Packed vs. Zoned


The other day I was discussing the differences/advantages of packed
numerics vs. zoned numerics in physical files.
This was brought up by the fact that zoned becomes packed during the
compile unless explicitly defined.
One of the benefits of packed is that it is supposed to perform better.
What other reasons are there for this?
Also, consider packed vs. binary.
I understand that if I define a binary field in a physical file the
compiler will convert it to packed. Is it true that the packed field is
then converted to binary to be processed at the MI level (or somewhere down
there) to be reconverted back to packed on the way back up?

Patrick Conner
www.ConnecTown.com
(828) 244-0822

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