Answer / srini

Sort the file based on key in descending order. You can
read the file in reverse order.

Answer / shrik

Reading the records into a buffer (array) and using it in
reverse order would be the first idea that comes to mind but
that way doesnt work for file with millions of records.

Answer / satty

we can read file in reverse order by using a dynamic array.
first transfer the ps into array and read it by -1 from
counter = no of records in the file

Answer / mahendra.ch

first we can move the records to an occurs

then

we can solve this problem by using perform varing 1 by -1
until i=0

hear i = number of racords.

iam shure it works.

thank you....

Answer / dimpy19

//STEP0100 EXEC PGM=SORT
//SYSOUT DD SYSOUT=*
//SORTIN DD DSN=YOUR INPUT DATASET,DISP=SHR
//SORTOUT DD DSN=YOUR OUTPUT FILE IN REVERSE ORDER,
// DISP=(NEW,CATLG,DELETE),UNIT=SYSDA,
// SPACE=(CYL,(X,Y),RLSE)
//SYSIN DD *
INREC FIELDS=(1,80,SEQNUM,8,ZD)
SORT FIELDS=(81,8,ZD,D)
OUTREC FIELDS=(1,80)
/*

Answer / laxmaiah

i have some knowledge in flat files,
(open input file-name reversed)
in this type use read the data in reverse order
AND write another file

Answer / pa

Being a flat file, we cant be sure that it will have a unique key field. So, External to the cobol program , using SORT utility, we can add a serial no column, and then SORT it in descending order based on that column and read the file sequentially in COBOL program.

Answer / dimpy19

1. Using FileAid

//STEP0100 EXEC PGM=FILEAID

//SYSPRINT DD SYSOUT=*

//DD01 DD DSN=YOUR INPUT DATASET,DISP=SHR

//DD01O DD DSN=YOUR OUTPUT FILE IN REVERSE ORDER,

// DISP=(NEW,CATLG,DELETE),UNIT=SYSDA,

// SPACE=(CYL,(X,Y),RLSE)

//SYSIN DD *

$$DD01 COPYBACK

/*

Answer / dimpy19

When REVERSED is specified, OPEN statement execution positions the QSAM file at its end. Subsequent READ statements make the data records available in reversed order, starting with the last record


Open INPUT filename REVERSED

Answer / sravani

using rrds it is possible. we can count the no of records using rrds key. by using if we can decrement from last to first

How can you add a particular field in copybook?

2 Answers   L&T,

I have a source program compiled with Cobol-2. The output file has a record length of 100 defined in the program but a record of 60 bytes getting written into it. i.e. The rest of 40 bytes I am not Writing anything. But it by default puts some values into the last 40 bytes. However it does not impact anything. But when Compiled the module with Enterprise Cobol the last 40 bytes were spaces as fillers. Can anyone explain?

5 Answers   Cognizant,

What is normalisation?

2 Answers   IBM,

period is missing in the cobol program which error we getting

5 Answers   TCS, Tesco,

how will u retreive value from a table.write it with syntex. 01 ws-table 05 ws-table1 occurs 10 times. 05 ws-table2 occurs 10 times. the above is 2 dimensional array..how will u retrieve 1st element of an array

3 Answers   ADP,

Write a cobol program making use of the redefine clause.

1 Answers  

give the examples for strings and unstrings in cobol

2 Answers   IBM,

How to resolve the soc4 & soc7 other than following answers. Soc4 can resolved using mispleed dd name and dd name is not matching with file and soc7 check the sysdump and copy the offest address then correct it in the program.

10 Answers   ADP, Amdocs, Cap Gemini, Keane India Ltd, Super Value, TCS,

is this below syntax correct? CALL 'subprg' using A,B Please help

2 Answers  

what is ASRA, AEY9?

2 Answers   IBM,

IDENTIFICATION DIVISION. PROGRAM-ID. UPDT. AUTHOR.anbu. DATE-WRITTEN. AUG 13. ENVIRONMENT DIVISION. INPUT-OUTPUT SECTION. FILE-CONTROL. SELECT CMSTR ASSIGN TO CINP1 ORGANIZATION IS INDEXED ACCESS IS SEQUENTIAL RECORD KEY CM2-KEY FILE STATUS IS WS-CMSTR-FST. SELECT CTAB ASSIGN TO CINP2 ORGANIZATION IS ACCESS IS SEQUENTIAL RECORD KEY VSAM-WHSE- KEY FILE STATUS IS WS-CTAB- FST. DATA DIVISION. FILE SECTION. FD CMSTR. COPY RXCYFC20. FD CTAB. COPY AITYWHSE. ************************************************************ ****** *** WORKING STORAGE VARIABLES *** ************************************************************ ****** WORKING-STORAGE SECTION. 01 WS- VARIABLES. 05 WS-EB PIC X(02) VALUE ZEROES. 05 WS-DIV PIC 9(03) VALUE ZEROES. 05 WS-CMF-RECS-REWRITTEN PIC 9(01) VALUE ZERO. *** FILE STATUS VARIABLES *** 05 WS- FILESTATUS. 10 WS-CMSTR-FST PIC 9(02) VALUE ZEROES. 10 WS-CTAB-FST PIC 9(02) VALUE ZEROES. *** END OF FILE VARIABLES *** 05 WS-CMSTR-EOF PIC X(01) VALUE 'N'. 88 WS-CMSTR-EOF-YES VALUE 'Y'. 88 WS-CMSTR-EOF-NO VALUE 'N'. 05 WS-CTAB-EOF PIC X(01) VALUE 'N'. 88 WS-CTAB-EOF-YES VALUE 'Y'. 88 WS-CTAB-EOF-NO VALUE 'N'. **** ERROR VARIABLES **** 05 WC-ABEND-900 PIC 9(03) VALUE 900. 05 WE-ERR-CODE PIC 9(02) VALUE ZEROES. 05 WE-ABEND-CODE PIC 9(03) VALUE ZEROES. ************************************************************ **** ********* PROCEDURE DIVISON ********** ************************************************************ **** PROCEDURE DIVISION. 0000- BEGIN. PERFORM 1000-INITIALISE THRU 1000- EXIT. PERFORM 2000-PROCESS THRU 2000- EXIT UNTIL WS-CMSTR-EOF- YES. DISPLAY 'WS-CMF-RECS-REWRITTEN :' WS-CMF-RECS- REWRITTEN. PERFORM 5000-CLOSE THRU 5000- EXIT. GOBACK. 0000- EXIT. EXIT. 1000- INITIALISE. OPEN I-O CMSTR. EVALUATE WS-CMSTR- FST WHEN 00 WHEN 97 CONTINUE WHEN OTHER DISPLAY 'ERROR IN READING INPUT FILE: ' DISPLAY WS-CMSTR-FST MOVE WS-CMSTR-FST TO WE-ERR-CODE PERFORM 9999-ABEND-PARA THRU 9999-EXIT END-EVALUATE. OPEN INPUT CTAB. EVALUATE WS-CTAB-FST WHEN 00 WHEN 97 CONTINUE WHEN OTHER DISPLAY 'ERROR IN READING INPUT FILE: ' DISPLAY WS-CTAB-FST MOVE WS-CTAB-FST TO WE-ERR-CODE PERFORM 9999-ABEND-PARA THRU 9999-EXIT END-EVALUATE. 1000-EXIT. EXIT. 2000-PROCESS. READ CMSTR. EVALUATE WS-CMSTR-FST WHEN 00 CONTINUE WHEN 10 SET WS-CMSTR-EOF-YES TO TRUE GO TO 2000-EXIT WHEN OTHER DISPLAY 'ERROR IN READING INPUT FILE: ' DISPLAY WS-CMSTR-FST MOVE WS-CMSTR-FST TO WE-ERR-CODE PERFORM 9999-ABEND-PARA THRU 9999-EXIT END-EVALUATE IF CM2-RECORD-TYPE-SOLD-TO MOVE CM2-ENTERING-BRANCH TO WS-EB PERFORM 3000-READ THRU 3000-EXIT UNTIL WS-CTAB-EOF-YES END-IF. 2000-EXIT. EXIT. 3000-READ. MOVE WS-EB TO VSAM-WHSE-CD. MOVE 'WHSE' TO VSAM-WHSE-ID. READ CTAB. EVALUATE WS-CTAB-FST WHEN 00 MOVE WHSE-DIV-CODE TO WS-DIV PERFORM 4000-REWRITE-CMF THRU 4000-EXIT WHEN 10 SET WS-CTAB-EOF-YES TO TRUE GO TO 3000-EXIT WHEN OTHER DISPLAY 'ERROR IN READING TABLE FILE: ' DISPLAY WS-CTAB-FST MOVE WS-CTAB-FST TO WE-ERR-CODE PERFORM 9999-ABEND-PARA THRU 9999-EXIT END- EVALUATE. 3000- EXIT. EXIT. 4000-REWRITE- CMF. IF WS-DIV = 250 OR 252 MOVE 'F' TO CM2-FREIGHT- TYPE MOVE 1 TO CM2-FREIGHT-THRESHOLD- AMT ADD +1 TO WS-CMF-RECS- REWRITTEN REWRITE CM2-SOLD-TO- RECORD DISPLAY 'RECORD UPDATED' END- IF. * EVALUATE WS-CMSTR- FST * WHEN 00 * CONTINUE * WHEN OTHER * DISPLAY 'FILE NOT UPDATED' * DISPLAY WS-CMSTR- FST * MOVE WS-CMSTR-FST TO WE-ERR-CODE * PERFORM 9999-ABEND-PARA THRU 9999-EXIT * GO TO 4000-EXIT * END-EVALUATE. 4000-EXIT. EXIT. 5000-CLOSE. CLOSE CMSTR CTAB. 5000-EXIT. EXIT. 9999-ABEND-PARA. COMPUTE WE-ABEND-CODE = WC-ABEND-900 + WE-ERR-CODE CALL 'ILBOABN0' USING WE-ABEND-CODE GO TO 5000-CLOSE. 9999-EXIT. EXIT. 5000-CLOSE. CLOSE CMSTR CTAB. 5000-EXIT. EXIT. 9999-ABEND-PARA. COMPUTE WE-ABEND-CODE = WC-ABEND-900 + WE-ERR-CODE CALL 'ILBOABN0' USING WE-ABEND-CODE GO TO 5000-CLOSE. 9999-EXIT. EXIT. //this program is giving maxcc=0, but not updating..

1 Answers  

What is difference between comp & comp-4?

6 Answers