COBOL Write Record into Variable Length Indexed File Example

File Write Tutorial   

Scenario - Writing a record into the variable length KSDS file.

Input file -

Browse           MATEPK.EMPL.VKSDS                                 Top of 5    
Command ===>                                                       Scroll CSR  
                            Type KSDS     RBA                      Format CHAR 
Key                                          Col 1 
<===>----10---+----2----+----3----+----4----+----5----+----6----+----7----+----
****  Top of data  ****
E0001EMPLOYEE1      MANAGER   0000200000         EMPLOYEE RECORD 1
E0002EMPLOYEE2      TL        0000150000         EMP REC 2
E0003EMPLOYEE3      SE        0000050000         EMP 3
E0004EMPLOYEE4      SSE       0000035000
E0005EMPLOYEE5      SE        0000040000         EMP 5
****  End of data  ****

Code -

----+----1----+----2----+----3----+----4----+----5----+
       IDENTIFICATION DIVISION.
       PROGRAM-ID. INDFILWR.
       AUTHOR. MTH.

       ENVIRONMENT DIVISION.
       INPUT-OUTPUT SECTION.
       FILE-CONTROL.
           SELECT EMPFILE ASSIGN TO INPUT01
           ORGANIZATION IS INDEXED
           ACCESS MODE  IS RANDOM
           RECORD KEY   IS EMP-ID 
           FILE STATUS  IS WS-FS1.

       DATA DIVISION.
       FILE SECTION.
      * EMPFILE structure definition 
       FD EMPFILE
           RECORD VARYING FROM 40 TO 80 CHARACTERS
                  DEPENDING ON EMPREC-LEN.
      * EMPFILE record structure definition
       01 EMP-RECORD80.
          05 EMP-ID        PIC X(05).
          05 EMP-NAME      PIC X(15).
          05 EMP-DESG      PIC X(10).
          05 EMP-SALARY    PIC 9(10).
          05 FILLER        PIC X(40).

       WORKING-STORAGE SECTION.
       01 WS-VAR.
          05 EMPREC-LEN    PIC 9(02).
          05 WS-FS1        PIC 9(02).

       PROCEDURE DIVISION.
      * Opening the file for writing
           OPEN I-O EMPFILE.

           INITIALIZE EMP-RECORD80
      * Receiving all the information of the record 
           ACCEPT EMP-ID.
           ACCEPT EMP-NAME.
           ACCEPT EMP-DESG.
           ACCEPT EMP-SALARY.
      * Writing record into file and validation
           MOVE  40   TO EMPREC-LEN
           WRITE EMP-RECORD80.
           IF WS-FS1 EQUAL ZERO
              DISPLAY "Record inserted successfully"
           ELSE
              DISPLAY "Record insertion failed"
           END-IF.

      * Closing file
           CLOSE EMPFILE.
           STOP RUN.

Run JCL -

//MATEPKF  JOB MSGLEVEL=(1,1),NOTIFY=&SYSUID    
//*
//STEP01  EXEC PGM=INDVFLWR
//STEPLIB  DD  DSN=MATEPK.COBOL.LOADLIB,DISP=SHR
//INPUT01  DD  DSN=MATEPK.EMPL.VKSDS,DISP=SHR
//SYSOUT   DD  SYSOUT=*
//SYSIN    DD  *
E0006
EMPLOYEE6
SE
0000040000
/*

Output -

Record inserted successfully

File after record insert -

Browse           MATEPK.EMPL.VKSDS                                 Top of 6    
Command ===>                                                       Scroll CSR  
                            Type KSDS     RBA                      Format CHAR 
Key                                          Col 1
<===>----10---+----2----+----3----+----4----+----5----+----6----+----7----+----
****  Top of data  ****
E0001EMPLOYEE1      MANAGER   0000200000         EMPLOYEE RECORD 1
E0002EMPLOYEE2      TL        0000150000         EMP REC 2
E0003EMPLOYEE3      SE        0000050000         EMP 3
E0004EMPLOYEE4      SSE       0000035000
E0005EMPLOYEE5      SE        0000040000         EMP 5
E0006EMPLOYEE6      SE        0000040000
****  End of data  ****

Explaining Example -

In the above example:

  • Variable length KSDS (MATEPK.EMPL.KSDS) file is used as an input file and file should be opened in I-O mode.
  • File organization is INDEXED and accessing mode should be DYNAMIC.
  • Program receives the record information from input stream (SYSIN DD *) and writes it into the file.