Run JCL to execute a step for all versions of GDGs.

himanshusoni77 · New User Joined: 19 Jul 2007 Posts: 6 Location: pune

Hi, This is my first post to this site. I need help in solving following situation.

I have to write an easytrieve program to display Record counts of particular types of record in the input file. I have to do this to generate counts for past 3 weeks files. Input to this program is GDG file. So my question here is,

- Instead of changing input file GDG version number and resubmitting JCL for 15 times,
1. Can I loop my JCL to run for say 15 times?
2. For iteration/run it should pickup previous generation to current run. (Changing GDG version dynamically, say for 1 st run -1, for second run -2, for 3rd run -3 ...)

gcicchet · Posted: Fri Apr 24, 2009 11:33 am

Hi,

the short answer is no.

Gerry

himanshusoni77 · New User Joined: 19 Jul 2007 Posts: 6 Location: pune

Hi Gerry,

I could see many posts on looping in JCL which seems possible. So are you saying 'NO' to point 2. regarding GDGs?

Is there any other way to achieve this without manually submitting job for each version?

gcicchet · Posted: Fri Apr 24, 2009 11:44 am

Hi,

JCL cannot loop.

You coud have a proc and excute it 15 times ie. 15 steps or 15 separate jobs.

You will need to adjust the GDG number for each step or job.

Gerry

anandinmainframe · Active User Joined: 31 May 2007 Posts: 171 Location: India

Himanshu Soni,
Can you copy the same step for 15 steps in one JCL by just changing the I/P(GDG Version) and O/P.

expat · Posted: Fri Apr 24, 2009 11:54 am

Yet again there is the transposition of the terms Version and Generation when the topic concerns GDS.

Please be aware that both terms are correct but have totally different meanings in context of a GDS.

It would be greatly appreciated if people could both learn and use the correct terminology in future

himanshusoni77 · New User Joined: 19 Jul 2007 Posts: 6 Location: pune

Hi Gerry,

Yes you are right, JCLs do not loop. What I meant by looping is resubmitting JCLs for n number of times using technique in below post

www.ibmmainframes.com/about2988.html

But i am not sure how can i use this for refering to various generations of GDG.

Bill Dennis · Posted: Fri Apr 24, 2009 7:13 pm

If you were allowed to UNCATLG each file as it processed, The DSN(0) would be correct for each step until all are gone from the catalog.

Otherwise, you must change the DSN for each step and run 15 of them.

dick scherrer · Posted: Fri Apr 24, 2009 8:19 pm

Hello,

If you created a small PROCedure and defined a symbolic parameter for the generation, your execute could be as small as a JOB statement, the PROC/PEND, and 15 EXECs each with the proper generation. . .

Terry Heinze · Posted: Sat Apr 25, 2009 8:32 am

Dick's suggestion is the way to go, in my opinion.