Re: Null Capable Fields

["Eric N. Wilson" <doulos1@xxxxxxxx>]

Oooh I see another venue to further my OOP agenda here! User Defined Data
Types in RPG! Then you could make a Null Work Field data type and it would
handle the nulledness of the value along with copy, arithmetic, boolean, and
what have you....

Can we  have it can we have it!!!

Gleefully
Eric

______________________________________________
Eric N. Wilson
President
Doulos Software & Computer Services
2913 N Alder St
Tacoma WA 98407


----- Original Message -----
From: <boldt@ca.ibm.com>
To: <RPG400-L@midrange.com>
Sent: Tuesday, October 12, 1999 5:25 AM
Subject: Re: Null Capable Fields


>
>
> Brian wrote:
> >Here is a excerpt from the on-line AS/400 reference books (V4R4) on this
> >subject:
> >"If the file used for an externally described data structure has
null-capable
> >fields defined, the null attribute is not used in defining the RPG
subfield."
> >
> >Is there a way to define fields internal to RPG programs as null capable?
> >If not, is there a work around for this?
>
> Sorry, no.
>
> Our intention was that in the future, if there were enough demand,
> we would possibly provide more support in this area.  Perhaps
> something like a ALWNULL(*FULL) option.
>
> The workaround is the brute force approach.  For each field declared
> internally that you want to treat as null-capable, define an
> indicator field that maintains the null attribute.   Then, every
> time you copy a null-capable field, also copy that indicator value.
>
> Cheers!  Hans
>
> Hans Boldt, ILE RPG Development, IBM Toronto Lab, boldt@ca.ibm.com
>
>
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