If step has concatenated DSNs, how to override?

Sunilp_cse · New User Joined: 02 Jul 2012 Posts: 7 Location: INDIA

We have a dd name such that it has two dsn names

If I would give a override for that dd name which dsn will override?

Example:

dick scherrer · Posted: Wed Aug 29, 2012 6:47 pm

Hello,

At the top of the page is a link to "IBM Manuals". In the JCL Language Reference, read about overriding.

If you find something that is not clear, post what you found and your doubt. Someone will be able to clarify.

If the job executes a PROCedure, suggest you consider using symbolic parameter(s).

Bill Woodger · Posted: Wed Aug 29, 2012 7:00 pm

You can knock-up something and try it.

The JCL output shows what you've actually done.

Gets the first one every time.

Edit: Not much of a useful subject, I'll give it a new go...

Anuj Dhawan · Posted: Wed Aug 29, 2012 7:03 pm

You're lucky that you've got only two DSNs to deal with -- suggest you do a bit of experiment and play around with these DDs, once you read through the Manuals (as Dick says) and searched through the Forums.

Phrzby Phil · Posted: Wed Aug 29, 2012 7:07 pm

You should really cut&paste actual code.

E.g., you have no //'s, a trailing comma and an embedded space.

Just suggesting a good practice to follow, even though your question here was clear.

Ed Goodman · Active Member Joined: 08 Jun 2011 Posts: 556 Location: USA

You'll never get it unless you try it. So do this - create a proc that has some concatenated datasets with one record each. Make the single record something easily identifiable, maybe "PROC 1", "PROC 2", "PROC 3". Use a good tool like DFSORT and have it just write out the results.

Then make some other files to use for overrides, and make them one record each, like "OVER 1", "OVER 2".

Then try overriding it with your JCL.

Be sure to do some where you want a single override to be the only data copied. Or where you want to override only the second file.

I can't remember it all, so I can't tell you how it works without doing it myself.

srinivasulu.p · New User Joined: 10 Jul 2012 Posts: 22 Location: india

which DSN u wnt to override actually

dbzTHEdinosauer · Posted: Thu Aug 30, 2012 12:11 pm

Bill Woodger · Posted: Thu Aug 30, 2012 12:15 pm

I have similar requirement for 37th DD.

Give me JCL.

Before topic is split, this is just a joke

dbzTHEdinosauer · Posted: Thu Aug 30, 2012 12:21 pm

though it is somewhat old (5 years) the rules have not changed
and the solution provided is still applicable.

How to override concatenated DSNs

BTW, it was the first hit when I googled
how to override concatenated dsns

Anuj Dhawan · Posted: Thu Aug 30, 2012 1:19 pm

OP seems to be disappeared.

enrico-sorichetti · Posted: Thu Aug 30, 2012 1:25 pm

just 18 hours from the initial post
give the guy a bit of time to let his neuron take a nap

Sunilp_cse · New User Joined: 02 Jul 2012 Posts: 7 Location: INDIA

Thanks for all for giving great suggestions

I have coded concatenated dsns in In stream proc and tried to override that dd
here is find the example
//OVERR PROC
//STEP01 EXEC PGM=IEBGENER
//SYSPRINT DD SYSOUT=*
//SYSIN DD DUMMY
//SYSUT1 DD DSN=S91965.SPLIT.FILE,DISP=SHR
//SYSUT2 DD DSN=S91965.SPLIT.FILEA,DISP=SHR
// DD DSN=S91965.SPLIT.FILEC,DISP=SHR
// PEND
//STEP02 EXEC OVERR
//SYSPRINT DD SYSOUT=*

//STEP01.SYSUT2 DD DSN=S91965.SPLIT.FILEB,DISP=SH
//SYSIN DD DUMMY
Here is one problem file that DSn=s91965. Split.fileA is successfully override By fileB and dats in FILE successfully copied to FILEB But the data in SYSUT1 file is not copied to FILEC.Could U guys please look into this?

enrico-sorichetti · Posted: Fri Aug 31, 2012 10:33 am

review Your understanding of data management and JCL

1) YOU CANNOT CONCATENATE OUTPUT DATASETS
2) once You override a DD the original DD specification is lost

Anuj Dhawan · Posted: Fri Aug 31, 2012 3:43 pm

As far as I can make out of your probelm- possibly, you'd like to use two steps to copy the data to two different DSNs... I might be mistaken in understaing what you mean though...

parsesource · New User Joined: 06 Feb 2006 Posts: 97

other options to override, add etc.

dick scherrer · Posted: Fri Aug 31, 2012 7:14 pm

Hello,

If you want to create multiple copies of the same file, you can do this with your sort product (if your release supportes this). This would take only 1 pass of the input data - which might make a difference if the file is very large.

There would be 2 output DD statements and you could then override either.

Sunilp_cse · New User Joined: 02 Jul 2012 Posts: 7 Location: INDIA

ya I need to copy output into two datasets

enrico-sorichetti · Posted: Mon Sep 03, 2012 2:54 pm

then You will have to run two <steps> of whatever <single command> utility You choose
( IEBGENER )

or one step with two <commands> for the <multiple command> utility You choose
( IDCAMS , DFSORT )

DFSORT example very quick and very dirty

Anuj Dhawan · Posted: Mon Sep 03, 2012 3:26 pm

Sunilp_cse - Please take some time and restate what you want to do? You initial question is about Override the concatenated-DSNs, however now you're talking about copy-data-from-input-to-multiple data-sets and this is no where close to "concatenation of DSNs" - because, per IBM, when data sets are concatenated, the application program treats them as if they were one logical data set. So what do you get by concatnating the "output" data-sets, to start with and why do you wnat to do that?

If you want to copy input (which migh be single Data-set or multiple) to multiple output data-sets, suggest you look, for example, at the documentation of SORT product at your shop and search for OUTFIL. This might/might-not fit for your situation. Or as said before, please restate what you want to do.

dbzTHEdinosauer · Posted: Mon Sep 03, 2012 3:32 pm

nice recap, Anuj

enrico-sorichetti · Posted: Mon Sep 03, 2012 3:46 pm

sometimes I wonder ... what is that is not clear here

Anuj Dhawan · Posted: Mon Sep 03, 2012 3:47 pm

I kept away from this thread, for a while but this thread seems to go no-where; though the subject title sounds pretty premitive. I realize that before I compiled the reply -- I deleted OPs double post, and called upon by someone and posted it later, however by then Enrico had already talked about OUTFIL...

But the question still remains, what exactly the OP wants? And if the latest query is a "new-queston", perhaps OP has to post a new thread altogether - too many loose ends to answer something useful...

And Thanks for the pointer to BPX1SLP, BPX4SLP in other thread; I think I'd need it soon.

enrico-sorichetti · Posted: Mon Sep 03, 2012 3:50 pm

we are wasting time
see for example the topic
www.ibmmainframes.com/viewtopic.php?t=59235&highlight=
where the TS asked for something and then disappeared

the TS might fit better here
ibmmainframeforum.com/index.php

dbzTHEdinosauer · Posted: Mon Sep 03, 2012 4:27 pm

I totally agree with you enrico.