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I think I was vague in my question :) What I was trying to determine or
get some assistance on was not what a NULL is, but how to test for it with
an RPG IV program....not embedded or free format.

From: vhamberg@xxxxxxxxxxx
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 08/01/2008 10:51 AM
Subject: Re: DDL - Handling Nulls

----------------------------------------------------------------------

NULL-capable fields have a NULL-indicator you can test - in embedded you
also can define a separate indicator variable - details are in the SQL
programming manuals for RPGLE.

Now things are getting better all the time - find the manual that matches
your OS level.

Strictly speaking, NULL is neither a value or a data type - it indicates
that the value of this column of this type is not known, or has no value.
However, many do loosely speak of a NULL value.

Best I can say is RTFM - it's all in there.

HTH
Vern

-------------- Original message --------------
From: Doug Palme <DPalme@xxxxxxxxxxx>

> We have been expirementing with DLL files lately and have run into an
> issue regarding NULL values. Now, I know that SQL tables allow NULL as a
> value for a field and it is considered a data type that can be used; and
> that is different than a blank.
>
> I also know that I can code the DDL up front to not allow nulls and
> provide a default value, but is there a way to handle nulls in an RPG IV
> program without having to recompile the DDL?
>
> Just looking for as many options here as possible, knowing that the best
> one is to code it right up front....
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