Temporary Data Sets DSN with Double Ampersand (&&) Prefix

Introduction

A data set created and deleted within a job (JCL Member) is a temporary data set. It is sometimes preferable to let the system assign a unique name by using a double ampersand (&&) prefix with the Data Set Name (or DSN) in the DD statement.

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The JCL Member

This sample JCL member (JCLTDSJ1.jcl) is a two step job. The first job step (TEMPFILE) will create a new temporary data set. The second job step (DOSYSOUT) will copy the temporary data set into a new SYSOUT file.

//JCLTDSJ1 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 a Sequential Data Set on disk using IEBGENER.
//* Author - SimoTime Technologies
//* Date   - January 24, 1996
//*
//* This sample JCL member is a two (2) step job.
//*
//* The first job step (TEMPFILE) will create a new temporary data
//* set. The second job step (DOSYSOUT) will copy the temprorary data
//* set into a new SYSOUT file.
//*
//* This set of programs will run on a mainframe under MVS or on a
//* Personal Computer with Windows and Micro Focus Mainframe Express.
//*
//* *******************************************************************
//* Step 1 of 2, Create and populate a new temporary data set...
//*
//TEMPFILE EXEC PGM=IEBGENER
//SYSPRINT DD  SYSOUT=*
//SYSIN    DD  DUMMY
//* :....1....:....2....:....3....:....4....:....5....:....6....:....7.
//SYSUT1   DD  *
Record 001 of a Temporary Data Set
Record 002 of a Temporary Data Set
Record 003 of a Temporary Data Set
/*
//SYSUT2   DD  DSN=&&JCLTDSD1,
//             DISP=(NEW,CATLG,DELETE),
//             STORCLAS=MFI,
//             SPACE=(TRK,5),
//             DCB=(RECFM=FB,LRECL=80,BLKSIZE=800,DSORG=PS)
//*
//* *******************************************************************
//* Step 2 of 2, Copy the Temporary Data Set created in the first step
//*              to a SYSOUT Spool File.
//*
//DOSYSOUT EXEC PGM=CV80RSEQ
//SYSPRINT DD  SYSOUT=*
//GETRS080 DD  DSN=&&JCLTDSD1,DISP=SHR
//PUTRS080 DD  SYSOUT=M
//

Summary

This job will describe and demonstrate how a data set with a unique Data Set Name (or DSN) can be created, processed and deleted by simply using a double ampersand (&&) prefix with the Data Set Name. 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.

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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.

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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 An Enterprise System Model that describes and demonstrates how Applications that were running on a Mainframe System and non-relational data that was located on the Mainframe System were copied and deployed in a Microsoft Windows environment with Micro Focus Enterprise Server.

    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

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Company Overview

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