RE: Variable Length Field Question

["Peter Connell" <Peter.Connell@xxxxxxxxxxxxxxxxxxxx>]

Brad,
A warning on large variable length return values.

Previous responses I've had on this list by the IBM guys indicate that
it appears the compiler has not been designed to accommodate these as
well as might be hoped. If you have many (like 100+) such statements in
a program, it is possible that it can eventually cause an automatic
storage overflow error, possibly triggered when some other normal but
unrelated exception has occurred. I speak from experience. When this
happens in a production job, like an http server, it can be devastating,
since the job is left in some sort of unstable state that can affect
subsequent requests. It does not affect fixed length return values or
varying length parameters.

Peter

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Brad Stone
Sent: Thursday, 20 May 2004 11:25 a.m.
To: RPG programming on the AS400 / iSeries
Subject: Re: Variable Length Field Question

On Wed, 19 May 2004 17:18:13 -0500 (CDT)
 Scott Klement <klemscot@xxxxxxxxxxxx> wrote:
> 
> Hi Brad,
> 
> > Assume I have field varField defined as Varying in an
> RPG
> > program.
> [SNIP]
> > eval varField = '^^^^^^Data^^^^^'
> > (Each ^ is a blank)
> [SNIP]
> > Should varField then equal:
> > "^^^^^^Data"
> 
> No.  It should equal exactly what you assigned to it.
>  '^^^^^^Data^^^^^'
> 

Ok, the reason I ask is I have a subprocedure that reads
and IFS file.  After the read it does this:

return $subst(buffer:1:BytesRead)

When I call it using a variable length field as the return
variable, it's getting the leading blanks truncated from
it.

The return field is not defined as Varying in the
subprocedure.  just 32767 byte field (may switch it to
varying in the future... just testing now).

So if I return
'^^^^^^^^^^^^^Data'

I get back:
'Data'

Very odd.
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