How to read records in reverse order in flat file?
I know we can do it by reading all records into an array....
Then read records in reverse order by using subscript or index
but can any body give me the exact code.
Re: How to read records in reverse order in flat file?
I know we can do it by reading all records into an array....
Then read records in reverse order by using subscript or index
but can any body give me the exact code.
WORKING-STORAGE
SECTION.
01 WS-COUNT PIC 9(4) VALUE ZEROS.
01 EOF PIC X(1) VALUE 'N'.
01ARRAY1.
05 ARREC OCCURS 1 TO 50 TIMES DEPENDING ON WS-COUNT.
10 AR-EMP-ID PIC X(5).
10 AR-EMP-NAME PIC X(10).
PROCEDURE
DIVISION.
OPEN INPUT
INFILE.
OPEN OUTPUT
OUTFILE.
PERFORM MOVE-RECORD UNTIL EOF = 'Y'.
PERFORM PARA1 UNTIL WS-COUNT = ZEROS
CLOSE
INFILE.
CLOSE OUTFILE.
STOP RUN.
MOVE-RECORD.
READ INFILE AT END MOVE 'Y' TO EOF
NOT AT END
MOVE INREC TO ARREC(WS-COUNT)
ADD 1 TO WS-COUNT.
PARA1.
MOVE ARREC(WS-COUNT) TO OUTREC
WRITE OUTREC
SUBTRACT 1 FROM WS-COUNT.
Re: How to read records in reverse order in flat file?
I know we can do it by reading all records into an array....
Then read records in reverse order by using subscript or index
but can any body give me the exact code.
You Can do it through JCL sort. Just add a seq number at the
last position of each record and sort it in descending order
of that seq number.
Here is the exacet code.
SORT FIELSD=COPY
OUTREC=(1,80,SEQNUM,4,ZD)
If your ps file is 80 byte long then this sort card a 4
digit seq num at 81 postion.
Now Sort the file on this seq num in descending
SORT FIELSD=(81,4,ZD,D)
Re: How to read records in reverse order in flat file?
I know we can do it by reading all records into an array....
Then read records in reverse order by using subscript or index
but can any body give me the exact code.
Narayan if we use your sort card we will get records in
reverse order but along with sequence numbers in cols 81-
84. You are not trimming the seq numbers
Stp1:
SORT FIELSD=COPY
OUTREC=(1,80,SEQNUM,4,ZD)
stp2:
SORT FIELSD=(81,4,ZD,D)
Outrec=(1,80)
The output file will have the records in reverse order.
Re: How to read records in reverse order in flat file?
I know we can do it by reading all records into an array....
Then read records in reverse order by using subscript or index
but can any body give me the exact code.
i have two file, each file having :
file1 is having 2 fields
field1 field2
file2 is having 3 fields
field1 field2 field3
my req is to make it one file like:
field1 field2 field1 field2 field3
if anyone know please send me syntax, i tried this with
DFSORT but could not succeed.
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