Re: Defining Files locally in Sub-Procedures - What advantages has everyone found doing it that way?

A little over a year ago, I wrote a program with the MAIN keyword and
local files just to have a go. Just dug it out. It's still the only
program on the system, so noone else can be very impressed. Reading
through, I thought it was good that each file was only used in one
place, ie, the sub-procedure. 'Til I found that one file had been
declared globally, presumably because it was needed by more than one
procedure. A java guy told me he declared everything as local then
changed to global whenever it was needed. I think when someone looks
at my code and sees one file in the F specs, he'll probably miss the
local file definitions the first time. I don't think it'll catch on
here as it needs more work to put in place. Same as SQL cursors.

2012/7/30 Dave <dfx1@xxxxxxxxxxxxxx>:

A little over a year ago, I wrote a program with the MAIN keyword and
local files just to have a go. Just dug it out. It's still the only
program on the system, so noone else can be very impressed. Reading
through, I thought it was good that each file was only used in one
place, ie, the sub-procedure. 'Til I found that one file had been
declared globally, presumably because it was needed by more than one
procedure. A java guy told me he declared everything as local then
changed to global whenever it was needed. I think when someone looks
at my code and sees one file in the F specs, he'll probably miss the
local file definitions the first time. I don't think it'll catch on
here as it needs more work to put in place. Same as SQL cursors.

2012/7/30 <rob@xxxxxxxxx>:

While I am not in the "if you're using a cursor you're doing it wrong"
camp I still do not think that all I/O should be done via SQL. I mix and
match.


Rob Berendt
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Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
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http://www.dekko.com





From: Alan Campin <alan0307d@xxxxxxxxx>
To: "RPG programming on the IBM i / System i" <rpg400-l@xxxxxxxxxxxx>,

Date: 07/27/2012 03:31 PM
Subject: Re: Defining Files locally in Sub-Procedures - What
advantages has everyone found doing it that way?
Sent by: rpg400-l-bounces@xxxxxxxxxxxx



I would ask a higher level question. Is it time to move to SQL? With
all the advantages and power of modern SQL I would question continuing
to use files.

On Fri, Jul 27, 2012 at 12:52 PM, Andy Hautamaki
<ahautamaki@xxxxxxxxxxxxxxx> wrote:

Our shop is going to be moving from V5R4 to V7 in a few months so I can
finally start using the enhancements in V6 and V7.

The idea of being able to define the files in Sub-Procedures instead of
globally in a module I was thinking would be very cool. Then I got to
thinking when would I really need to do that? When has everyone else

been

finding it was a better idea to define the files in a sub-procedure?

I was reading about how the file will be closed without it having the
static keyword. When would it be better to use the static versus not? If
your using the sub-procedure repeatedly the open and closing of the file
seems like a reason to be using the static. Interesting idea that you

could

be getting different records for the same file in different

sub-procedures.

Thanks
Andy
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