004 – Introduction to JCL – EXEC Statement

Source - http://www.geocities.com/srcsinc/drona/programming/languages/jcl/jcl.chapter4.html

EXEC statement

EXEC statement is used to execute a program/procedure

A maximum of 255 EXEC statement can code in an single job

Syntax  - //stepname EXEC PGM=program-name,keyword parameters

            Positional parameter  -  Program-name

Keyword parameters for EXEC

            PARM  ACCT ADDRSPC DPRTY PERFORM RD

PARM

          PARAM parameter is used to pass information to program

          Syntax  ->  PARM=value

                      Value is a string can be 1 to 100 characters long.

         PASSING PARAMETER USING PARM PARAMETER

         

         PARM-INDICATOR will contain "RAMESH"

         PARM-LENGTH contains length of string.             

Remaining parameters , We wont use much     

ACCT    - accounting information for that step

ADDRSPC - used to indicate to the system that the job step is use either
          virtual or real storage

DPRTY   - used to assign priority to the job step

PERFORM - specifies the rate at which system resources used by job step

RD      - restart definition is used to specify automatic restart of a job
          if it abends







 

Q. If there is a situation, where we need to code more than 255 steps in a JOB?
A. We need to split jcl into two jcls , at the end of the first jcl check the condition
code and initiate the second jcl.

~ by munchy on July 4, 2008.