Re: CONSTRAINT DDS Equivalent

[rob@xxxxxxxxx]

Either using SQL's constraint or the ADDPFCST (if you're a glutton for 
punishment and want to have to break it up into multiple steps) will do. I 
was amazed that the S/36 IDDU and it's list of valid values was enforced 
in the S/36 equivalent of UPDDTA but it was dropped on the iSeries.  IBM 
went to the Least Common Denominator syndrome.

I've used the SQL's constraints on some files here.

Rob Berendt
-- 
Group Dekko Services, LLC
Dept 01.073
PO Box 2000
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





Tony Carolla <carolla@xxxxxxxxx> 
Sent by: rpg400-l-bounces@xxxxxxxxxxxx
10/13/2004 06:22 PM
Please respond to
RPG programming on the AS400 / iSeries <rpg400-l@xxxxxxxxxxxx>


To
RPG programming on the AS400 / iSeries <rpg400-l@xxxxxxxxxxxx>
cc

Fax to

Subject
CONSTRAINT DDS Equivalent






I am in the process of building a new application, and I have a need
to create some fields that must contain a certain list of values.  I
know that these files will be utilized by other programmers, and I
would like to ensure, at the file level, that only certain values make
it into these fields.

I reviewed the DDS VALUES keyword for PFs, and it seems that this only
helps when building DSPFs that REF the file.  I am comtemplating
creating these tables in SQL, and using the CONSTRAINT concept to
block data being placed into this file that doesn't match the required
list of values.  This seems to work well, but I don't know
performance-wise if this will cause slowdowns.

I was wondering, am I missing something, or is there a way to create a
PF using DDS (or Code Designer), such that only certain values are
allowed into a field?

Thanks!


-- 
"Enter any 11-digit prime number to continue..."
--
This is the RPG programming on the AS400 / iSeries (RPG400-L) mailing list
To post a message email: RPG400-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
or email: RPG400-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/rpg400-l.