A Single COBOL Program for QSAM Access
|
COBOL and QSAM or Sequential File A Single COBOL Program for QSAM Access |
| When technology complements business | Copyright © 1987-2012 SimoTime Enterprises All Rights Reserved |
| The SimoTime Home Page |
This suite of programs provides an example of how a single mainline COBOL program accesses a QSAM or Sequential file. The COBOL program is written using COBOL/2 dialect but also works with COBOL for MVS and COBOL/370. A JCL member is provided to run the job as an MVS batch job on an IBM mainframe or as a project with Micro Focus Mainframe Express (MFE) running on a PC with Windows.
This example may serve as a tutorial for programmers that are new to COBOL or QSAM-Sequential file processing. This example may also be used as a reference for experienced programmers.
The following is the mainframe JCL (CBLQSMJ3.JCL) required to run as an MVS batch job on the mainframe. This will also run on the PC with Micro Focus Mainframe Express. The coding technique is used with the expectation the JCL would be used as a stand alone procedure.
//CBLQSMJ3 JOB SIMOTIME,ACCOUNT,CLASS=1,MSGCLASS=0,NOTIFY=CSIP1 //* ******************************************************************* //* CBLQSMJ3.JCL - a JCL Member for Batch Job Processing * //* This program is provided by: SimoTime Enterprises * //* (C) Copyright 1987-2012 All Rights Reserved * //* Web Site URL: http://www.simotime.com * //* e-mail: helpdesk@simotime.com * //* ******************************************************************* //* //* Text - COBOL for QSAM or Sequential file I/O //* Author - SimoTime Enterprises //* Date - January 01, 1997 //* //* This set of programs illustrates the use of a COBOL program to //* do QSAM or Sequential file I/O. The purpose is to show the //* processing of a QSAM or Sequential file. //* //* This set of programs will run on a mainframe under MVS or on a //* Personal Computer with Windows and Micro Focus Mainframe Express. //* //* ************ //* * CBLQSMJ3 * //* ********jcl* //* * //* * //* ************ ************ ************ //* * QSAM0080 *-----* CBLQSMC3 *-----* Console * //* *******data* ********cbl* ******dsply* //* * //* * //* ************ //* * EOJ * //* ************ //* //* ******************************************************************* //* Step 1 of 1 This is a single step job. //* //CBLVSMX1 EXEC PGM=CBLQSMC3 //STEPLIB DD DSN=SIMOTIME.DEMO.LOADLIB1,DISP=SHR //QSAM0080 DD DSN=SIMOTIME.DATA.QSAM0080,DISP=SHR //*
The following is the Windows Command (CBLQSME3.CMD) required to run as a batch job on a Windows System with Micro Focus.
@echo OFF
rem * *******************************************************************
rem * CBLQSME3.CMD - a Windows Command File *
rem * This program is provided by SimoTime Enterprises *
rem * (C) Copyright 1987-2012 All Rights Reserved *
rem * Web Site URL: http://www.simotime.com *
rem * e-mail: helpdesk@simotime.com *
rem * *******************************************************************
rem *
rem * Text - COBOL to access QSAM and display records to console.
rem * Author - SimoTime Enterprises
rem * Date - January 01, 2006
rem *
rem * This single COBOL program will read and display the contents
rem * of a sequential file of 80-byte, fixed-length records.
rem *
rem * ********************************************************************
rem * Step 1 of 2, Set the global environment variables...
rem *
setlocal
call ..\Env1BASE %CmdName%
if "%SYSLOG%" == "" set syslog=c:\SimoLIBR\LOGS\SimoTime.LOG
set CmdName=CblQsmE3
rem *
call SimoNOTE "*******************************************************%CmdName%"
call SimoNOTE "Starting JobName %CmdName%"
rem * ********************************************************************
rem * Step 2 of 2, Execute the sample program...
rem *
set QSAM0080=%BaseLib1%\DATA\Asc1\SIMOTIME.DATA.QSAM0080.DAT
rem *
run CBLQSMC3
if not "%ERRORLEVEL%" == "0" set JobStatus=0010
if not "%JobStatus%" == "0000" goto :EojNOK
:EojAOK
call SimoNOTE "Finished CmdName %CmdName%, Job Status is %JobStatus%"
goto :End
:EojNOK
call SimoNOTE "ABENDING CmdName %CmdName%, Job Status is %JobStatus%"
echo %DATE% - %TIME% Starting User ABEND Processing...>>%SYSLOG%
set >>%SYSLOG%
echo %DATE% - %TIME% Complete User ABEND Processing...>>%SYSLOG%
goto :End
:End
call SimoNOTE "Conclude SysOut is %SYSOUT%"
if not "%1" == "nopause" pause
exit /B %JobStatus%
This program (CBLQSMC3.CBL) was written to be used as a teaching and learning aid. It is a simple program that reads a sequential file and displays the records. Notice the "Z-DISPLAY-IO-STATUS" routine to display the file status code.
IDENTIFICATION DIVISION.
PROGRAM-ID. CBLQSMC3.
AUTHOR. SIMOTIME ENTERPRISES.
*****************************************************************
* Copyright (C) 1987-2012 SimoTime Enterprises. *
* *
* All rights reserved. Unpublished, all rights reserved under *
* copyright law and international treaty. Use of a copyright *
* notice is precautionary only and does not imply publication *
* or disclosure. *
* *
* Permission to use, copy, modify and distribute this software *
* for any non-commercial purpose and without fee is hereby *
* granted, provided the SimoTime copyright notice appear on all *
* copies of the software. The SimoTime name or Logo may not be *
* used in any advertising or publicity pertaining to the use *
* of the software without the written permission of SimoTime *
* Enterprises. *
* *
* Permission to use, copy, modify and distribute this software *
* for any commercial purpose requires a fee to be paid to *
* SimoTime Enterprises. Once the fee is received by SimoTime *
* the latest version of the software will be delivered and a *
* license will be granted for use within an enterprise, *
* provided the SimoTime copyright notice appear on all copies *
* of the software. The SimoTime name or Logo may not be used *
* in any advertising or publicity pertaining to the use of the *
* software without the written permission of SimoTime *
* Enterprises. *
* *
* SimoTime Enterprises makes no warranty or representations *
* about the suitability of the software for any purpose. It is *
* provided "AS IS" without any expressed or implied warranty, *
* including the implied warranties of merchantability, fitness *
* for a particular purpose and non-infringement. SimoTime *
* Enterprises shall not be liable for any direct, indirect, *
* special or consequential damages resulting from the loss of *
* use, data or projects, whether in an action of contract or *
* tort, arising out of or in connection with the use or *
* performance of this software *
* *
* SimoTime Enterprises *
* 15 Carnoustie Drive *
* Novato, CA 94949-5849 *
* 415.883.6565 *
* *
* RESTRICTED RIGHTS LEGEND *
* Use, duplication, or disclosure by the Government is subject *
* to restrictions as set forth in subparagraph (c)(1)(ii) of *
* the Rights in Technical Data and Computer Software clause at *
* DFARS 52.227-7013 or subparagraphs (c)(1) and (2) of *
* Commercial Computer Software - Restricted Rights at 48 *
* CFR 52.227-19, as applicable. Contact SimoTime Enterprises, *
* 15 Carnoustie Drive, Novato, CA 94949-5849. *
* *
*****************************************************************
* This program is provided by SimoTime Enterprises *
* Our e-mail address is: helpdesk@simotime.com *
* Also, visit our Web Site at http://www.simotime.com *
* *
*****************************************************************
*
*****************************************************************
* Source Member: CBLQSMC3.CBL
*****************************************************************
*
* CBLQSMC3 -This is an example of a single COBOL program that
* accesses a QSAM or Sequential File.
*
* EXECUTION OR CALLING PROTOCOL
* -----------------------------
* Use standard mainframe JCL to EXECUTE or ANIMATE.
*
* DESCRIPTION
* -----------
* This program uses standard COBOL syntax to access a QSAM
* or Sequential File.
*
* ************
* * CBLQSMJ3 *
* ********jcl*
* *
* *
* ************ ************ ************
* * QSAM0080 *-----* CBLQSMC3 *-----* CONSOLE *
* *******qsam* ********cbl* ******dsply*
*
*
* REQUIREMENTS
* ------------
* This program was originally written to conform to the IBM,
* COBOL II dialect but will work with COBOL for MVS or COBOL/390.
* This program may also be executed on the PC using Mainframe
* Express (MFE) from Micro Focus.
*
*****************************************************************
*
* MAINTENANCE
* -----------
* 1997/02/27 Simmons, Created program.
* 1997/02/27 Simmons, No changes to date.
* 1998/11/10 Simmons, Modified to conform to COBOL II.
* 1998/11/21 Simmons, Added code to display file status when an
* I/O error occurs.
*
*****************************************************************
*
ENVIRONMENT DIVISION.
INPUT-OUTPUT SECTION.
FILE-CONTROL.
SELECT QSAM0080-FILE
ASSIGN to QSAM0080
ORGANIZATION is SEQUENTIAL
ACCESS MODE is SEQUENTIAL
FILE STATUS is QSAM0080-STATUS.
*
DATA DIVISION.
FILE SECTION.
FD QSAM0080-FILE.
01 QSAM0080-RECORD.
05 QSAM0080-KEY pic X(6).
05 QSAM0080-DATA pic X(74).
WORKING-STORAGE SECTION.
*****************************************************************
* Data-structure for Title and Copyright...
* ------------------------------------------------------------
01 SIM-TITLE.
05 T1 pic X(11) value '* CBLQSMC3 '.
05 T2 pic X(34) value 'Sample, COBOL for QSAM I/O '.
05 T3 pic X(10) value ' v03.01.30'.
05 T4 pic X(24) value ' http://www.simotime.com'.
01 SIM-COPYRIGHT.
05 C1 pic X(11) value '* CBLQSMC3 '.
05 C2 pic X(20) value 'Copyright 1987-2012 '.
05 C3 pic X(28) value '--- SimoTime Enterprises ---'.
05 C4 pic X(20) value ' All Rights Reserved'.
01 SIM-THANKS-01.
05 C1 pic X(11) value '* CBLQSMC3 '.
05 C2 pic X(32) value 'Thank you for using this softwar'.
05 C3 pic X(32) value 'e provided from SimoTime Enterpr'.
05 C4 pic X(04) value 'ises'.
01 SIM-THANKS-02.
05 C1 pic X(11) value '* CBLQSMC3 '.
05 C2 pic X(32) value 'Please send all inquires or sugg'.
05 C3 pic X(32) value 'estions to the helpdesk@simotime'.
05 C4 pic X(04) value '.com'.
*****************************************************************
01 QSAM0080-STATUS.
05 QSAM0080-STAT1 pic X.
05 QSAM0080-STAT2 pic X.
*****************************************************************
* The following buffers are used to create a four-byte status *
* code that may be displayed. *
*****************************************************************
01 IO-STATUS.
05 IO-STAT1 pic X.
05 IO-STAT2 pic X.
01 IO-STATUS-04.
05 IO-STATUS-0401 pic 9 value 0.
05 IO-STATUS-0403 pic 999 value 0.
01 TWO-BYTES-BINARY pic 9(4) BINARY.
01 TWO-BYTES-ALPHA redefines TWO-BYTES-BINARY.
05 TWO-BYTES-LEFT pic X.
05 TWO-BYTES-RIGHT pic X.
*****************************************************************
* Buffer used for posting messages to the console.
*****************************************************************
01 MESSAGE-BUFFER.
05 MESSAGE-HEADER pic X(11) value '* CBLVSMC1 '.
05 MESSAGE-TEXT.
10 MESSAGE-TEXT-1 pic X(68) value SPACES.
10 MESSAGE-TEXT-2 pic X(188) value SPACES.
*****************************************************************
01 APPL-RESULT pic S9(9) comp.
88 APPL-AOK value 0.
88 APPL-EOF value 16.
01 END-OF-FILE pic X(3) value 'NO '.
*****************************************************************
PROCEDURE DIVISION.
perform Z-POST-COPYRIGHT.
perform QSAM0080-OPEN.
perform until END-OF-FILE = 'YES'
if END-OF-FILE = 'NO '
perform QSAM0080-GET-NEXT
if END-OF-FILE = 'NO '
display QSAM0080-RECORD upon console
end-if
end-if
end-perform.
perform QSAM0080-CLOSE.
perform Z-THANK-YOU.
GOBACK.
*****************************************************************
* I/O routines to access a QSAM or Sequential file... *
*****************************************************************
QSAM0080-GET-NEXT.
read QSAM0080-FILE.
if QSAM0080-STATUS = '00'
subtract APPL-RESULT from APPL-RESULT
else
if QSAM0080-STATUS = '10'
add 16 to ZERO giving APPL-RESULT
else
add 12 to ZERO giving APPL-RESULT
end-if
end-if
if APPL-AOK
CONTINUE
else
if APPL-EOF
move 'YES' to END-OF-FILE
else
move '* QSAM0080-FAILURE-GET-!!!'
to MESSAGE-TEXT
perform Z-DISPLAY-MESSAGE-TEXT
move QSAM0080-STATUS to IO-STATUS
perform Z-DISPLAY-IO-STATUS
perform Z-ABEND-PROGRAM
end-if
end-if
exit.
*---------------------------------------------------------------*
QSAM0080-OPEN.
add 8 to ZERO giving APPL-RESULT.
open input QSAM0080-FILE
if QSAM0080-STATUS = '00'
subtract APPL-RESULT from APPL-RESULT
else
add 12 to ZERO giving APPL-RESULT
end-if
if APPL-AOK
CONTINUE
else
move 'QSAM0080-FAILURE-OPEN-!!!' to MESSAGE-TEXT
perform Z-DISPLAY-MESSAGE-TEXT
move QSAM0080-STATUS to IO-STATUS
perform Z-DISPLAY-IO-STATUS
perform Z-ABEND-PROGRAM
end-if
exit.
*---------------------------------------------------------------*
QSAM0080-CLOSE.
add 8 to ZERO giving APPL-RESULT.
close QSAM0080-FILE
if QSAM0080-STATUS = '00'
subtract APPL-RESULT from APPL-RESULT
else
add 12 to ZERO giving APPL-RESULT
end-if
if APPL-AOK
CONTINUE
else
move 'QSAM0080-FAILURE-CLOSE-!!!' to MESSAGE-TEXT
perform Z-DISPLAY-MESSAGE-TEXT
move QSAM0080-STATUS to IO-STATUS
perform Z-DISPLAY-IO-STATUS
perform Z-ABEND-PROGRAM
end-if
exit.
*****************************************************************
* The following Z-Routines perform administrative functions
* for this program.
*****************************************************************
Z-ABEND-PROGRAM.
if MESSAGE-TEXT not = SPACES
perform Z-DISPLAY-MESSAGE-TEXT
end-if
move 'IS ABENDING !' to MESSAGE-TEXT
perform Z-DISPLAY-MESSAGE-TEXT
add 12 to ZERO giving RETURN-CODE
STOP RUN.
* exit.
*****************************************************************
* Display the file status bytes. This routine will display as *
* four digits. If the full two byte file status is numeric it *
* will display as 00nn. If the 1st byte is a numeric nine (9) *
* the second byte will be treated as a binary number and will *
* display as 9nnn. *
*****************************************************************
Z-DISPLAY-IO-STATUS.
if IO-STATUS not NUMERIC
or IO-STAT1 = '9'
move IO-STAT1 to IO-STATUS-04(1:1)
subtract TWO-BYTES-BINARY from TWO-BYTES-BINARY
move IO-STAT2 to TWO-BYTES-RIGHT
add TWO-BYTES-BINARY to ZERO giving IO-STATUS-0403
move 'File Status is: nnnn' to MESSAGE-TEXT
move IO-STATUS-04 to MESSAGE-TEXT(17:4)
perform Z-DISPLAY-MESSAGE-TEXT
else
move '0000' to IO-STATUS-04
move IO-STATUS to IO-STATUS-04(3:2)
move 'File Status is: nnnn' to MESSAGE-TEXT
move IO-STATUS-04 to MESSAGE-TEXT(17:4)
perform Z-DISPLAY-MESSAGE-TEXT
end-if
exit.
*****************************************************************
* Display CONSOLE messages... *
*****************************************************************
Z-DISPLAY-MESSAGE-TEXT.
if MESSAGE-TEXT-2 = SPACES
display MESSAGE-BUFFER(1:79) upon console
else
display MESSAGE-BUFFER upon console
end-if
move all SPACES to MESSAGE-TEXT
exit.
*---------------------------------------------------------------*
Z-POST-COPYRIGHT.
display SIM-TITLE upon console
display SIM-COPYRIGHT upon console
exit.
*****************************************************************
Z-THANK-YOU.
display SIM-THANKS-01 upon console
display SIM-THANKS-02 upon console
exit.
*****************************************************************
* This example is provided by SimoTime Enterprises *
* Our e-mail address is: helpdesk@simotime.com *
* Also, visit our Web Site at http://www.simotime.com *
*****************************************************************
The purpose of this document is to assist as a tutorial for new programmers or as a quick reference for experienced programmers. In the world of programming there are many ways to solve a problem. This document and the links to other documents are intended to provide a choice of alternatives.
Permission to use, copy, modify and distribute this software, documentation or training material for any purpose requires a fee to be paid to SimoTime Enterprises. Once the fee is received by SimoTime the latest version of the software, documentation or training material will be delivered and a license will be granted for use within an enterprise, provided the SimoTime copyright notice appear on all copies of the software. The SimoTime name or Logo may not be used in any advertising or publicity pertaining to the use of the software without the written permission of SimoTime Enterprises.
SimoTime Enterprises makes no warranty or representations about the suitability of the software, documentation or learning material for any purpose. It is provided "AS IS" without any expressed or implied warranty, including the implied warranties of merchantability, fitness for a particular purpose and non-infringement. SimoTime Enterprises shall not be liable for any direct, indirect, special or consequential damages resulting from the loss of use, data or projects, whether in an action of contract or tort, arising out of or in connection with the use or performance of this software, documentation or training material.
This section includes links to documents with additional information that is beyond the scope and purpose of this document. The first sub-section requires an internet connection, the second sub-section references locally available documents.
Note: A SimoTime License is required for the items to be made available on a local server.
The following links will require an internet connect.
A good place to start is The SimoTime Home Page for access to white papers, program examples and product information.
This suite of programs and documentation is available for download. Link to an Evaluation zPAK Option that includes the program members, documentation and control files.
Explore the non-Relational Data Connection for more examples of accessing methodologies and coding techniques for Data Files and VSAM Data Sets.
This suite of programs provides an example of how a COBOL program calls a COBOL I/O routine to accesses a QSAM or Sequential file.
This suite of programs and documentation provides an example of how a COBOL program calls an Assembler I/O routine to access a QSAM file. The file is a flat, record sequential file.
Explore The ASCII and EBCDIC translation tables. These tables are provided for individuals that need to better understand the bit structures and differences of the encoding formats.
Explore The File Status Return Codes to interpret the results of accessing VSAM data sets and QSAM files.
Explore The Micro Focus Web Site for more information about products and services available from Micro Focus.
The following links may be accessible without an internet connection.
Explore The File Status Return Codes to interpret the results of accessing VSAM data sets and QSAM files.
Check out The SimoTime Glossary for a list of terms and definitions used in the documents provided by SimoTime.
This document was created and is maintained by SimoTime Enterprises.
If you have any questions, suggestions, comments or feedback please call or send an e-mail to: helpdesk@simotime.com
We appreciate hearing from you.
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| Copyright © 1987-2012 SimoTime Enterprises All Rights Reserved |
| When technology complements business |
| http://www.simotime.com |