RE: RPG - conversion vs re-write

[Bob Cozzi <BobCozzi@xxxxxxx>]

Lance,

I don't object to the percent sign. It just goes against my grain that 
there is no way to handle, for date fields, a null date value. Setting on 
the NULLID does not alter the field's value. You can still use it as far as 
I know. I just, ad-hoc, wrote "IsNULL()" as a response to another note in 
which somebody asked for an ISNULL function.

Bob Cozzi
Bob@RPGIV.COM
www.rpgiv.com
AS/400 Books:  http://www.rpgiv.com/as400Books.html


On Thursday, September 11, 1997 10:55 AM, CVWD@aol.com [SMTP:CVWD@aol.com] 
wrote:
> In a message dated 97-09-11 08:33:26 EDT, you write:
>
> > Okay, here's some code that saves absolutely nothing, but is more
> >  English-like that %NULLID(ddd)=*ON
> >
> >
> >       D IsNULL          PR             1S 0
> >       D   TestDate                      L   Const
> >
> >       PIsNULL           B                   Export
> >       D IsNull          PI             1S 0
> >       D  TestDate                       L   Const
> >       C                   Return    (%NULLID(TestDate)=*ON)
> >       PIsNULL           E
> >
> >  Using this procedure, you can then do this in Calcs
> >
> >  C                  If            IsNull(MyDateFld)
> >  C                  /*  do your null-date routine here */
> >  C                  endif
> >
> >
> >  This would be the same as:
> >
> >  C                  If            %NullID(MyDateFld)=*ON
> >  C                  /*  do your null-date routine here */
> >  C                  endif
> >
> >
> >  Now, I suppose the thing that might byte me is the return type on the
> >  procedures. I used a 1-digit signed numeric. I don't know if 
Indicators
> can
> >  automatically be cast to zoned decimals, so if it doesn't work, do a 
Z-ADD
>
> >  deal right before the return, or similar.
> >
> >
>
> Is all that really worth it?  According to the ILE manual you can just 
say:
>
> C                  If            %Nullid(MyDateFld)
> C                  /*  do your null-date routine here */
> C                  endif
>
> What is it you object to so strenuously?  The percent sign?  Just 
wondering -
> Lance.
>
>
>
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