CONCAT is not a standard TSO/E command. It's likely a Rexx or CLIST, in
which case you can look at the code to see what it does. If it's an RYO
command processor, you may not have the source.
I agree with your earlier comment that handling concatenations may be
different from single data sets because of the most likely usage of them.
A concatenation is pretty useless unless you run a process that works on
multiple data sets. The most common usage, SYSPROC/SYSEXEC, requires that
specific DDNAME and would be meaningless with a system-generated DDNAME.
OTOH there are some processes that require a data set (or volume) to be
allocated under any random DDNAME; they just have to be allocated. In
those cases--almost never a concatenation--a system-generated DDNAME is
fine.
.
.
J.O.Skip Robinson
Southern California Edison Company
Electric Dragon Team Paddler
SHARE MVS Program Co-Manager
626-302-7535 Office
323-715-0595 Mobile
jo.skip.robin...@sce.com
From: Paul Gilmartin <paulgboul...@aim.com>
To: IBM-MAIN@LISTSERV.UA.EDU,
Date: 04/02/2014 02:50 PM
Subject: Re: FREE DDNAME with concatenated datasets?
Sent by: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU>
On Wed, 2 Apr 2014 16:25:10 -0500, Walt Farrell wrote:
>As far as I know, gil, that's the way that FREEing a concatenation has
always worked. It truly frees the first one, but merely deconcatenates the
others. So, yes, I believe you'll need to remember them if you want to be
able to truly free them later.
>
Thanks.
Well, they's concatenations, and they's concatenations, and it appears
that
some concatenations is more equal than others. By a brief experiment:
allocate dd(ddn) dsn(dsn1,dsn2)
free ddn
... frees both catenand data sets. But:
allocate dd(ddn) dsn(dsn1)
allocate dd(ddn2) dsn(dsn2)
concat ddlist(ddn,ddn2)
free ddn
...frees dsn1 but leaves dsn2 allocated. So, I'm left wondering what's
different
between the control block structures created by the two processes. (Or
did
I make an observational error?)
Unfortunately, the first form isn't available for concatenating:
o UNIX files
o uncatalogued data sets occupying different volumes.
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