Dynamically Change the DSN Name
|
IDCAMS, DELETE/DEFINE Dynamically Change the DSN Name |
|
| The SimoTime Home Page |
Introduction
This example describes how to use a single JCL Member and IDCAMS to create VSAM Clusters with unique data set names. When creating a VSAM Cluster for a Keyed-Sequenced-Data-Set (a KSDS or other types such as ESDS) using IDCAMS the Data Set Name (or DSN) must be explicitly defined. In other words, JCL substitution cannot be done within the SYSIN parameters for IDCAMS. However, this does not prevent us from accomplishing the task, it just presents a bigger challenge.
In this example we want to show how a single JCL Member can be used to create a VSAM Cluster with the high-level qualifier of the Data Set Name (DSN) being defined by an external value. Since the DSN must be explicitly defined within the SYSIN for IDCAMS the substitution must take placed prior to executing IDCAMS. To do this we are going to use a primary (or template) set of specifications. We will use a COBOL program to read the primary set of specifications and substitute a new high-level qualifier based on a parameter passed via the PARM= on the EXEC statement. A new set of specifications will be created using the temporary data set capability of JCL. This new set of specifications will be used by a subsequent job step that executes IDCAMS to create the VSAM Cluster with a user-defined high-level qualifier in the Data Set Name (or DSN).
We have made a significant effort to ensure the documents and software technologies are correct and accurate. We reserve the right to make changes without notice at any time. The function delivered in this version is based upon the enhancement requests from a specific group of users. The intent is to provide changes as the need arises and in a timeframe that is dependent upon the availability of resources.
Copyright © 1987-2024
SimoTime Technologies and Services
All Rights Reserved
Overview of Sample Application
The following is an overview of the four job steps for this suite of programs.
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Create a VSAM Cluster with a Unique High-Level Qualifier in the Data Set Name (or DSN) |
The JCL Member
This sample JCL member (JCLCAMV1.jcl) is a four step job. The first two steps create the VSAM cluster and the second two steps populate the VSAM Data Set. The first job step (REPROREP) will create a new temporary data set. The second job step (KSDSMAKE) will use the temporary data set to DELETE/DEFINE a VSAM Cluster with the new name. The third job step (QSAMCRT1) will create a sequential file containing customer data and the fourth and final job step (KSDSLOAD) will populate the VSAM data set.
The techniques used in this JCL Member will allow the job to do repeated executions without having to clean-up work files. The DELETE/DEFINE in the SYSIN for IDCAMS and the use of temporary data sets using the &&datasetname notation provides this functionality.
//JCLCAMV1 JOB SIMOTIME,CLASS=1,MSGCLASS=0,NOTIFY=&SYSUID //* ******************************************************************* //* This JCL member is provided by SimoTime Technologies * //* (C) Copyright 1987-2019 All Rights Reserved * //* Web Site URL: http://www.simotime.com * //* e-mail: helpdesk@simotime.com * //* ******************************************************************* //* //* Text - Create an empty VSAM, KSDS data set using IDCAMS. //* Author - SimoTime Technologies //* Date - January 24, 1996 //* //* This job will delete an existing VSAM Cluster and Define a new //* VSAM Cluster. The VSAM, KSDS data set will have a key of twelve //* characters starting at the first position in the record. //* The record length will be 512 characters. //* //* This set of programs will run on a mainframe under MVS or on a //* Personal Computer with Windows and Micro Focus Mainframe Express. //* //* ******************************************************************* //* // INCLUDE MEMBER=SETPARMS //* //* Step 1 of 4, Prepare to Create a VSAM Cluster. //* //* This job step will execute a COBOL program that reads a primary //* PDSM and creates a new sequential file that substitutes the PARM= //* value for the SIMOTIME literal in the primary PDSM. //* The new sequential file is a temporary data set used in a //* subsequent job step. //* //REPROREP EXEC PGM=RR80RSEQ,PARM=&DSNAME01 //GETRS080 DD DISP=SHR,DSN=&DSNAME01..PDS.PARMLIB(JCLCAMS1) //PUTRS080 DD DSN=&&CAMSINFO, // DISP=(NEW,CATLG,DELETE), // STORCLAS=MFI, // SPACE=(TRK,5), // DCB=(RECFM=FB,LRECL=80,DSORG=PS) //SYSOUT DD SYSOUT=* //* //* ******************************************************************* //* Step 2 of 4, DELETE/DEFINE a VSAM Cluster. //* //* This job step will execute IDCAMS. The SYSIN for IDCAMS is the //* specifications file (temporary data set) created in a previous //* job step. //* //KSDSMAKE EXEC PGM=IDCAMS //SYSPRINT DD SYSOUT=* //SYSIN DD DISP=SHR,DSN=&&CAMSINFO //SYSOUT DD SYSOUT=* //* //* ******************************************************************* //* Step 3 of 4, Create and populate a new QSAM file... //* //* This job step executes IEBGENER. The input data is instream and the //* output is a sequential file of 80-byte, fixed length records. The //* output file is a Temporary Data Set used by a subsequent job step. //* //QSAMCRT1 EXEC PGM=IEBGENER //SYSPRINT DD SYSOUT=* //SYSIN DD DUMMY //* :....1....:....2....:....3....:....4....:....5....:....6....:....7. ..:....8 //SYSUT1 DD * 000100 Anderson Adrian 1113 Peachtree Plaza Atlanta GA 26101 000200 Brown Billie 224 Baker Boulevard Baltimore MD 35702 000300 Carson Cameron 336 Crenshaw Blvd. Cupertino CA 96154 000400 Davidson Dion 448 Main Street Wilmington DE 27323 000500 Everest Evan 55 5TH Avenue New York NY 10341 000600 Franklin Francis 6612 66TH Avenue Bedrock NY 11903 000700 Garfunkel Gwen 777 77TH Street New York NY 16539 000800 Harrison Hilary 888 88TH Street Pocatello ID 79684 000900 Isley Isabel 999 99TH Avenue Indianapolis IN 38762 001000 Johnson Jamie 1010 Paradise Drive Larkspur CA 90504 001100 Kemper Kelly 1111 Oak Circle Kansas City KS 55651 001200 Lemond Lesley 1212 Lockwood Road Mohave Desert AZ 80303 001300 Mitchell Marlow 1313 Miller Creek Road Anywhere TX 77123 001400 Newman Noel 1414 Park Avenue Santa Monica CA 90210 001500 Osborn Owen 1515 Center Stage Rolling Rock PA 36613 001600 Powell Pierce PO Box 1616 Ventura CA 97712 001700 Quigley Quincy 1717 Farm Hill Road Oshkosh WI 43389 001800 Ripley Ray 1818 Alien Lane Wayout KS 55405 001900 Smith Sammy 1919 Carnoustie Drive Novato CA 94919 002000 Tucker Taylor 2020 Sanger Lane St. Paul MN 43998 002100 Underwood Ulysses 2121 Wall Street New York NY 17623 002200 Van Etten Valerie 2222 Vine Street Hollywood CA 98775 002300 Wilson Wiley 2323 Main Street Boston MA 01472 002400 Xray Xavier 2424 24TH Street Nashville TN 44190 002500 Young Yanni 2525 Yonge Street Toronto ON 6B74A6 002600 Zenith Zebulon 2626 26TH Street Dallas TX 71922 123456 Doe John 123 Main Street Anywhere OR 88156 /* //SYSUT2 DD DSN=&&CUST0080, // DISP=(NEW,CATLG,DELETE), // STORCLAS=MFI, // SPACE=(TRK,5), // DCB=(RECFM=FB,LRECL=80,BLKSIZE=800,DSORG=PS) //* ******************************************************************* //* Step 4 of 4, Read the Sequential File, Update the VSAM KSDS. //* //* This job step will execute a COBOL program that reads a sequential //* file that is a Temporary Data Set created in a previous job step. //* The data from the sequential file is reformatted and used to update //* or populate the VSAM, KSDS created in a previous job step. //* //KSDSLOAD EXEC PGM=CUSI80C1 //CUST0080 DD DSN=&&CUST0080, // DISP=SHR //CUSTMAST DD DSN=&DSNAME01..DATA.VSAMK512, // DISP=SHR //SYSOUT DD SYSOUT=* //*
The JCL INCLUDE Member
This sample JCL INCLUDE member (SETPARMS.inc) provides a set of substitution values. Its purpose is to provide a single point to define variables that are used by various jobs.
//* ******************************************************************* //* This JCL Include Member is provided by SimoTime Technologies * //* (C) Copyright 1987-2018 All Rights Reserved * //* Web Site URL: http://www.simotime.com * //* e-mail: helpdesk@simotime.com * //* ******************************************************************* //* //* Subject: SET a group of shared substitution parameters //* Author: SimoTime Technologies //* Date: January 1,1998 //* // SET DSNAME01=MIFODATA // SET DSNAME02=DATA // SET DSNAME03=WORKFILE //* //* ******************************************************************* //*
The SYSIN Member for IDCAMS
The actual SYSIN Member used by the job step that executes IDCAMS is a Temporarily Data Set created using the DSN=&&DATASETNAME notation. The job step preceding the execution of IDCAMS creates the temporary data set by executing a COBOL program that reads a Partitioned Data Set Member (PDSM) that is used as a template. The COBOL program searches for the "SIMOTIME" literal and replaces it with a user defined value. The following (JCLCAMS1.ctl) shows the content of the PDSM that is named JCLCAMS1.CTL.
/* **************************************************************** */
/* SYSIN Specifications for use with IDCAMS */
/* This Member is provided by SimoTime Technologies */
/* (C) Copyright 1987-2016 All Rights Reserved */
/* Web Site URL: http://www.simotime.com */
/* e-mail: helpdesk@simotime.com */
/* **************************************************************** */
DELETE SIMOTIME.DATA.VSAMK512
SET MAXCC = 0
DEFINE CLUSTER (NAME(SIMOTIME.DATA.VSAMK512) -
KEYS(12,0) -
RECORDSIZE(512,512) -
REUSE -
TRACKS(45,15)) -
DATA (NAME(SIMOTIME.DATA.VSAMK512.DAT) -
FREESPACE(10,15) -
CISZ(8192)) -
INDEX (NAME(SIMOTIME.DATA.VSAMK512.IDX))
The following shows the JES output with the substituted values that are actually used by the job step that does the IDCAMS execution.
Micro Focus MFJAMS Utility 6.0.001
/* **************************************************************** */
/* SYSIN Specifications for use with IDCAMS */
/* This Member is provided by SimoTime Enterprises */
/* (C) Copyright 1987-2011 All Rights Reserved */
/* Web Site URL: http://www.simotime.com */
/* e-mail: helpdesk@simotime.com */
/* **************************************************************** */
DELETE MIFODATA.DATA.VSAMK512
JCLAM0114I(00) - ENTRYNAME DELETED [MIFODATA.DATA.VSAMK512]
SET MAXCC = 0
JCLAM0141I(00) - MAXCC set to 0.
DEFINE CLUSTER (NAME(MIFODATA.DATA.VSAMK512) -
KEYS(12,0) -
RECORDSIZE(512,512) -
REUSE -
TRACKS(45,15)) -
DATA (NAME(MIFODATA.DATA.VSAMK512.DAT) -
FREESPACE(10,15) -
CISZ(8192)) -
INDEX (NAME(MIFODATA.DATA.VSAMK512.IDX))
JCLAM0113I(00) - ENTRYNAME DEFINED [MIFODATA.DATA.VSAMK512]
JCLAM0113I(00) - ENTRYNAME DEFINED [MIFODATA.DATA.VSAMK512.DAT]
JCLAM0113I(00) - ENTRYNAME DEFINED [MIFODATA.DATA.VSAMK512.IDX]
Summary
This example describes how to use a single JCL Member and IDCAMS to create VSAM Clusters with unique data set names. This document may be used 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 documentation and software were developed and tested on systems that are configured for a SIMOTIME environment based on the hardware, operating systems, user requirements and security requirements. Therefore, adjustments may be needed to execute the jobs and programs when transferred to a system of a different architecture or configuration.
SIMOTIME Services has experience in moving or sharing data or application processing across a variety of systems. For additional information about SIMOTIME Services or Technologies please contact us using the information in the Contact or Feedback section of this document.
Software Agreement and Disclaimer
Permission to use, copy, modify and distribute this software, documentation or training material for any purpose requires a fee to be paid to SimoTime Technologies. 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 Technologies.
SimoTime Technologies 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 Technologies 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.
Downloads and Links
This section includes links to documents with additional information that are beyond the scope and purpose of this document. The first group of documents may be available from a local system or via an internet connection, the second group of documents will require an internet connection.
Note: A SimoTime License is required for the items to be made available on a local system or server.
Current Server or Internet Access
The following links may be to the current server or to the Internet.
Note: The latest versions of the SimoTime Documents and Program Suites are available on the Internet and may be accessed using the 
icon. If a user has a SimoTime Enterprise License the Documents and Program Suites may be available on a local server and accessed using the 
icon.
Explore the JCL Connection for more examples of JCL functionality with programming techniques and sample code.
Explore the COBOL Connection for more examples of COBOL programming techniques and sample code.
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 that are used to interpret the results of accessing VSAM data sets and/or QSAM files.
Internet Access Required
The following links will require an internet connect.
This suite of programs and documentation is available to download for review and evaluation purposes. Other uses will require a SimoTime Software License. Link to an Evaluation zPAK Option that includes the program members, documentation and control files.
A good place to start is The SimoTime Home Page for access to white papers, program examples and product information. This link requires an Internet Connection
Explore The Micro Focus Web Site for more information about products (including Micro Focus COBOL) and services available from Micro Focus. This link requires an Internet Connection.
Glossary of Terms
Explore the Glossary of Terms for a list of terms and definitions used in this suite of documents and white papers.
Contact or Feedback
This document was created and is maintained by SimoTime Technologies. If you have any questions, suggestions, comments or feedback please use the following contact information.
| 1. | Send an e-mail to our helpdesk. |
| 1.1. | helpdesk@simotime.com. |
| 2. | Our telephone numbers are as follows. |
| 2.1. | 1 415 763-9430 office-helpdesk |
| 2.2. | 1 415 827-7045 mobile |
We appreciate hearing from you.
Company Overview
SimoTime Technologies was founded in 1987 and is a privately owned company. We specialize in the creation and deployment of business applications using new or existing technologies and services. We have a team of individuals that understand the broad range of technologies being used in today's environments. Our customers include small businesses using Internet technologies to corporations using very large mainframe systems.
Quite often, to reach larger markets or provide a higher level of service to existing customers it requires the newer Internet technologies to work in a complementary manner with existing corporate mainframe systems. We specialize in preparing applications and the associated data that are currently residing on a single platform to be distributed across a variety of platforms.
Preparing the application programs will require the transfer of source members that will be compiled and deployed on the target platform. The data will need to be transferred between the systems and may need to be converted and validated at various stages within the process. SimoTime has the technology, services and experience to assist in the application and data management tasks involved with doing business in a multi-system environment.
Whether you want to use the Internet to expand into new market segments or as a delivery vehicle for existing business functions simply give us a call or check the web site at http://www.simotime.com
| Return-to-Top |
| IDCAMS with DELETE/DEFINE and Dynamically Changing the DSN Name |
| Copyright © 1987-2024 SimoTime Technologies and Services All Rights Reserved |
| When technology complements business |
| http://www.simotime.com |