RE: Allocate field with options(*nopass :*omit)

Lim,

Number one rule of performance when coding: don't worry about it unless
testing shows it to be a problem.

Having said that, here a a couple of thoughts:
- Use the STATIC keyword on the d-spec for the standalone temporary
field.  This will prevent the temporary field from having to be
recreated every time the procedure is run.
- Consider using a VARYING temporary field to limit the amount of data
to be moved.

HTH,

Charles Wilt
--
iSeries Systems Administrator / Developer
Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121
  

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx 
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Lim Hock-Chai
Sent: Wednesday, August 30, 2006 10:24 AM
To: RPG programming on the AS400 / iSeries
Subject: RE: Allocate field with options(*nopass :*omit)

I might be wasting my time to gain some insignificant amount of
efficiency.  Here is my thought: Using below as an example, 
won't it be
a waste of cpu to have to copy those two big optional fields to
temporary fields for every single execution?

     p example         B                   export
     d                 pi            10i 0 opdesc
     d  piParm1                   32767    const
options(*varsize:*nopass:*omit)
     d  piParm2                   32767    const
options(*varsize:*nopass:*omit)

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Peter Levy
Sent: Wednesday, August 30, 2006 8:56 AM
To: RPG programming on the AS400 / iSeries
Subject: Re: Allocate field with options(*nopass :*omit)

Unfortunately what you want to do can't really be done. Given 
that your
parameter is a constant you can only have a local variable with a
default value (as has already been suggested). If you changed your
parameter by removing the "const" keyword you could do something like
this:

     P test            B

     D test            pi
     D  piParm1                      10a   options(*nopass)

     D pi              s                   like(piParm1) based(piPtr)
     D piPtr           s               *   inz(*null)

     C                   if        %parms() >= 1
     C                   eval      piPtr = %addr(piParm1)
     C                   else
     C                   alloc     %size(piParm1)piPtr
     C                   endif

     C                   if        pi = *blank
     C*                    .... Do something
     C                   else
     C*                    .... Do something else
     C                   endif

     C                   if        %parms() < 1
     C                   dealloc(n)              piPtr
     C                   endif

     p test            E

However it's hardly worth the effort. Better to use the local 
variable.

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