Re: RPG400 same fields name of Input and Output files Update & Write question

Hi Vern and Joe,

When I first saw that code I thought wow, they don't make 'em like that
anymore!
I agree with you, bit If he is learning RPG, should he go straight ahead
with free and never know about the wonders of the columnized language?

Le 25 novembre 2011 20:37, Vern Hamberg <vhamberg@xxxxxxxxxxx> a écrit :

Also we don't use right-hand indicators for things like end-of-file or
not-found anymore.

And using an infinite loop and a READ - well, CHAIN would be ever so
much better.

On 11/25/2011 1:14 PM, Joe Pluta wrote:

Hi Gary!

Most of your assumptions are correct, but before I take the time to
address them, would you tell me why you are coding this program? Is it
a production program on a live system, or is this just a theoretical
exercise for some sort of RPG class? Because in the modern RPG
programming community, we no longer recommend the use of RPG III style
coding and indicators. And even in RPG III, we emphatically recommend
AGAINST the use of left-hand indicators (such as your 99 LEAVE

instruction).

Joe

Hi,

I have a simply RPG with one Input file A, one output file B and they

have same fields names KEY, FIELD1, FIELD2

Here is the code:

*LOVAL SETLL A
1 DOWEQ 1
READ A 99
99 LEAVE

WRITE B


ENDDO

Without any MOVE (no rename of file B FIELD1& FIELD2) it can write to

file B

However, for update operation


*LOVAL SETLL A
1 DOWEQ 1
READ A 99
99 LEAVE

(MOVE FIELD1#TMP)

KEY CHAIN B 98
(MOVE #TMP FIELD1)

N98 UPDATE B


ENDDO

Without any MOVE in (...), can reading every records in file A update

FIELD1& FIELD2 in file B of the matching key of file B?

Further, if I add MOVE FIELD1 #TMP before CHAIN, and N98 MOVE #TMP

FIELD1 after CHIAN, can it only update FIELD1 in file B with value of
FIELD1 in file A? and FIELD2 is unchanged in file B?

Thanks

CHOI

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