RE: Subfile Processing

Force of habit.  The array index is the rrn so it's not terribly
expensive.

> -----Original Message-----
> From: rpg400-l-bounces@xxxxxxxxxxxx
> [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Booth Martin
> Sent: Tuesday, August 09, 2005 2:20 PM
> To: RPG programming on the AS400 / iSeries
> Subject: RE: Subfile Processing
>
> Why keep the comparison data in an array?  Why not just keep
> it in the subfile as a hidden field?
>
>
>
> I just create a data structure, usually like the data's
> record, and then save the original data as a hidden field in
> the subfile.  That way I always have the before and after
> picture for compares, and to refresh if the user wishes.
>
>
>
> A third advantage has to do with record locking.  When your
> user finally decides to press the enter key and process the
> new data, a quick chain to the data file and then a quick
> compare of the data currently in the record with the values
> in the hidden data structure will tell you if the record was
> changed at another workstation.
>
>
>
> 
>
> 
>
> ---------------------------------
>
> Booth Martin
>
> http://www.martinvt.com
>
> ---------------------------------
>
> -------Original Message-------
>
> 
>
> From: RPG programming on the AS400 / iSeries
>
> Date: 08/09/05 16:05:30
>
> To: RPG programming on the AS400 / iSeries
>
> Subject: RE: Subfile Processing
>
> 
>
> You'd be surprised how fast looping through all the records
> in a subfile
>
> is.  If each record is shadowed in an array, the comparisons go very
>
> fast. For interactive response time it's perfectly
> acceptable.   This is
>
> a function of improved hardware.  A lot of the display file keywords
>
> were developed to minimize the amount of data that passed
> back and forth
>
> between the terminal and the host during the days of 9.6 cables and
>
> machines with less memory than a contemporary desktop. 
> There's no doubt
>
> that things like READC are faster, but for idiots like me the
> loop is a
>
> lot clearer.
>
> 
>
> 
>
> > -----Original Message-----
>
> > From: rpg400-l-bounces@xxxxxxxxxxxx
>
> > [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Marvin Radding
>
> > Sent: Tuesday, August 09, 2005 1:13 PM
>
> > To: RPG programming on the AS400 / iSeries
>
> > Subject: RE: Subfile Processing
>
> >
>
> > First, don't loop through the whole file.  If the users are
>
> > modifying the records, then READC will be the fastest way to
>
> > get the modified record.  And don't forget that if there is
>
> > an error, use the return record on next read flag.  Saves a
>
> > lot of headaches.
>
> >
>
> > Marvin
>
> >
>
> >
>
> 
>
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