Pli Training Class-2

7/27/2019 Pli Training Class-2

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IBM-Mainframes

PLI Training Class- 02


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So far we have Covered

Background and History of PLI.

Structure of PLI Program.

PLI Layout/PLI Code Sheet

My First PLI Program


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Preparation for PLI Programs

Three important steps:

1. Write a PLI Program.

2. Compile the Program.

3. Execute the Program..Compilation: Process of converting from source code to

object code

.For every PLI program we need to compile using JCL. The

compile JCL will be standard for the all the programs.

.Just we need to copy the compile JCL from the existing

Dataset and make the necessary changes.


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Preparation for PLI Program

DISPGM: PROCEDURE OPTIONS(MAIN);PUT LIST(HELLO WORLD!);

PUT SKIP LIST(HELLO ALL);

END DSIPGM;

COMPILER

(IBMZPLI)

HEWL/IEWL

( LINK EDITOR )

Output: Object Module

Output: Load Module

PLI Program

Execution JCL

OutputSpool or File


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JCLJob control Language


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Introduction on JCL

JCL stands forJOB CONTOL LANGAUGE and mostly used to

compile and execute batch programs.

JOB : Execution of one or more programs is knows as a JOB

To write any JCL we require

1. JOB Statement.

2. EXEC Statement.

3. DD Statement.

4. Null Statement.


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JCL Statements

JOBSTATEMENT: JOB statement is used to identify the JOB Name

and JOBs related parameters (accounting info, username, class, notify

etc).

Syntax:

//JOBNAME JOB ACCTINFO,USERNAME,NOTIFY=USER-ID

Jobname: To identify the job in the spool, should be USER-ID + atleast

1 character. EX: FSS197A/FSS197B

AccountingInformation: Is mainly used for billing purpose.

Username: Is used to identify who has written the JCL.

Notify: Is used to decided to which USER-ID the JOB has to be notify

after successful or unsuccessful compilation


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JCL Statements contd..

EXEC Statement:This statement is used to identify the step name and

program name. A maximum we can write 255 statements in a single

JOB.

Syntax:

//STEP1 EXECPGM=PROG NAME

DDstatement: Is used to specify the input and output location required

for a program execution/compilation.

Syntax: //DDNAME DD PARAMETERS


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JCL Statements contd..

DDnames

STEPLIB : This is used to identify the path of the load module

(ML language code) for a particular step only.

JOBLIB : This is used to identify the path of the load module

(ML language code) for the entire steps in a job.

SYSPRINT: This is used to print the output messages in the

spool.

SYSOUT: If the program is unsuccessful the error O/P will be

routed in to the spool. SYSIN: This is used to pass input data to the PL/I program.

NULL STATEMENT(//): It is used to indicate the end of the JCL.


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JCL Coding Sheet

123---------COLUMN NUMBERS------7273------------------80

//Name-field statement parameter1, 2,3 **COMMENTS**

Every statement in JCL are preceded by //

Name field: JOB Name, Step Name and DD name

Statement Fields: JOB, EXEC, DD Statement

Comment : To make any comment in the JCL program we need

to code //*

End of JCL is specified byNull statement i.e., //


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Sample Execution JCL

//JOBNAME JOB 123,SAHASRA,CLASS=A,NOTIFY=&SYSUID

//*JOBLIB DD DSN=USERID.NAME.LOADLIB,DISP=SHR

//STEP1 EXEC PGM=DISPGM

//STEPLIB DD DSN=USERID.NAME.LOADLIB,DISP=SHR

//SYSPRINT DD SYSOUT=*

//SYSOUT DD SYSOUT=*

//


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Thank You

Polsani Anil Kumar

Documents

Pli Training Class-2