Re: RPG IV not up to the task of reading and writing to DB files....

"Wilt, Charles" wrote:
> 
> Still, I have procedures that really need some way to return or set a
> reference variable to a NULL value.  Can't be done, there's no such
> thing as a standalone null capable variable in RPG.
> 

Starting in V5R4, you can code OPTIONS(*NULLIND) on a parameter, and the
null-indicator(s) for the parameter will get passed along with the data
(available for reference or CONST parameters).  There's no nullind
support for return values, though; only parameters.

You still can't define a standalone null capable variable, but you can
define an externally-described data structure and the alwnull fields
will become null-capable subfields.  (This was available starting in
V5R2, but it wasn't much use for parameters, since the null values
didn't get passed along with the data structure.)