What is Referback JCL?

What is Referback JCL?

A backward reference is a reference to an earlier statement in the job or in a cataloged or in-stream procedure called by a job step. This is a way to reduce or simplify the coding in JCL. The information that is referred back should be in the same JOB.

Where we can use Referback in JCL?

JCL has a facility called “JCL REFERBACK” to clone parameter information from the previous step. In laymen’s terms, JCL REFER BACK is a reference to a previous statement parameter. Backward reference in the JCL can be used in the job or in-stream procedure, or in a cataloged.

What is DCB parameter in JCL?

DCB. The Data Control Block (DCB) parameter details the physical characteristics of a dataset. This parameter is required for datasets that are newly created in the job step. LRECL is the length of each record held within the dataset. RECFM is the record format of the dataset.

How do you override a proc in JCL?

To override, nullify, or add parameters to a procedure OUTPUT JCL or DD statement, code in the name field of the overriding OUTPUT JCL or DD statement the name of the procedure step containing the overridden statement, followed by a period, followed by the name of the procedure OUTPUT JCL statement or the ddname of the …

What is Referback?

To submit something back to some person or group of authority, as to decide, settle, or examine something. A noun or pronoun can be used between “refer” and “back.” We’ll have to refer back this matter and proceed only once we’ve heard from our legal team.

How do I accept Sysin data in Cobol?

COBOL ACCEPT

1. We can use the ACCEPT Statement to accept the value from the JCL or a system defined value.
2. ACCEPT IDENTIFIER FROM [Mnemonic-name]
3. ACCEPT EMPLOYEE-DETAILS.
4. SYSIN Parameter is used in JCL(JOB CONTROL LANGUAGE) to pass the data from JCL to COBOL Program.
5. a) //SYSIN DD * values…

What is backward reference?

A backward reference is a reference to an earlier DD statement in the job or in a cataloged or in-stream procedure called by a job step.

What is RLSE in JCL?

RLSE function notifies the close function to release unused space on the dataset closes. RLSE function supports sequential, partitioned and VSAM. If RLSE function specified and an abnormal termination occurs, the system does not release unused space even though the data set is open.

What is DCB mainframe?

In IBM mainframe operating systems, such as OS/360, MVS, z/OS, a Data Control Block (DCB) is a description of a dataset in a program. A DCB is coded in Assembler programs using the DCB macro instruction (which expands into a large number of “define constant” instructions).

What is a proc in mainframe?

Introduction. JCL defines how a job is executed on the mainframe. A job may perform many steps or execute many programs in order to produce the requested information or output. If a segment of JCL is used repeatedly it may be coded once as a PROC (or JCL Procedure) and then used by many different steps within the job.

What is PARM parameter in JCL?

PARM parameter is an optional keyword parameter in JCL. PARM parameter is a way to pass a data from JCL to the program but the maximum amount of data which we can send to the program using the PARM Parameter is 100 character.

How does JCL define temporary dataset?

Temporary datasets need storage only for the job duration and are deleted at job completion. Such datasets are represented as DSN=&name or simply without a DSN specified. If a temporary dataset created by a job step is to be used in the next job step, then it is referenced as DSN=*.