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

To avoid "move" you can define the input file twice (with different names, you can "create alias") and then read input, chain output, chain input alias, update output.

It is a lot clearer if you use rpg free. The input file can also be "primary", then you dont need the read.

Gary Choi wrote:

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