JCL - Override parameter

revathi palaniswamy · New User Joined: 16 May 2011 Posts: 4 Location: India

Hi,

I have an requirement in which i need to set a symbolic parameter in the JCL based on the requirement in each run;Depends on the value passed to the symbolic para the input filebeing used in the jcl also vary.

clearly say,The symbolic parameter passed in the JCL is 'V'.
if V='|M|' --> then input file used in the proc is : GD.OC33&V.&F..&P.0.DC01
if V='|A|' --> then input file used in the proc is : GD.OC33&V.&F..&P.0.DC01 And GD.OC556R.P028.M01.DC95

Question : I need to code both files in the procedure irrespective of the parameter passed, and while submitting the jcl,it should take correct input file based on value specified in V.
Please some one help me on this.

enrico-sorichetti · Posted: Mon May 16, 2011 1:29 pm

review Your understanding of jcl parameter substitution ...
a parameter is substituted asis

in Your example

revathi palaniswamy · New User Joined: 16 May 2011 Posts: 4 Location: India

Thanks for your quick reply.

The substitution is fine to me(Overriding concept). But the question is, if i use V=|M| it should take only one file as input , at the same time if V=|A| it should take two files as input. I have to code the logic for the same.

enrico-sorichetti · Posted: Mon May 16, 2011 1:52 pm

that the principle behind jcl parameter handling logic
it will not add nor delete anything,
it will just handle what is there, no more no less

as i said before, but You did not care to consider it
use DD override

for the case M

revathi palaniswamy · New User Joined: 16 May 2011 Posts: 4 Location: India

Thanks.

In the above sample code, we are overriding (adding) additional file in the JCL (job) in case of V=A. This is one way to handle right.

Is there any other way to add all the input file names in the procedures, and pass V=M or A from JCL and depends on the value Proc should take correct file to process.

enrico-sorichetti · Posted: Mon May 16, 2011 2:30 pm

since the solution I posted works why in heaven You keep pestering for different ones ?

replying on a forum is
on voluntary base
on our own time
free of charge
usually based on above average experience

expat · Posted: Mon May 16, 2011 2:37 pm

I can very vaguely remember doing something similar about 20+ years ago.

As I don't have mainframe access for this contract the concept is derived from memory and the order of the DD statements may be the wrong way around.

Everything that you need to know is readily available in the JCL manuals.

Take a look at

Nic Clouston · Posted: Mon May 16, 2011 11:26 pm

You could use your symbolics to pick up seperate INCLUDE code - when M it picks up INCLUDE code with one dataset when A it will pick up the INCLUDE code for the concatenated datasets.

dick scherrer · Posted: Tue May 17, 2011 2:28 am

Hello,

Just make sure both files exist (or are created before reaching this step). Otherwise there will be a "file not found" JCL error.

enrico-sorichetti · Posted: Tue May 17, 2011 2:47 am

I had forgotten that // include can be parametrized
tested and working ...

everything is in ENRICO.TEST.JCL
the job

revathi palaniswamy · New User Joined: 16 May 2011 Posts: 4 Location: India

Thank you so much