Re: What bugs you about KLISTs in RPG IV?

["R. Bruce Hoffman, Jr." <rbruceh@xxxxxxx>]

boldt@ca.ibm.com wrote:
> 
> about KLISTs is that they are necessary at all! If we weren't
> limited to 14 chars in Factor 1, we would be able to list the
> keys directly in the CHAIN opcode.  Imagine for a moment:
> 
>      cf   chain (custno: acctno: date) mastfile
> 
> or even:
> 
>      cf  chain (prodno: 'X' + subcode(n+14)) mastfile
> 
> In other words, full expressions coded directly as key fields
> for the keyed I/O operations!

Oh boy.  NO.

But then again YES.

It would depend on the coder.  Remember that we spend 90% of the
program's life in maintenance.  This method would allow a programmer
(and you better believe that they would do this) to scatter this stuff
all over the program.  Every CHAIN op would have to be visited for key
information if the keys changed.  The only way around that (and I know
of VERY few programmers that do this) is to code every CHAIN as a
subroutine or procedure and isolate the key list to that subroutine or
procedure.

So on second thought...  probably, but no.

-- 
===========================================================
R. Bruce Hoffman, Jr.
 -- IBM Certified AS/400 Professional System Administrator
 -- IBM Certified AS/400 Professional Network Administrator

"The sum of all human knowledge is a fixed constant.
    It's the population that keeps growing!"
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