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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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