> I am not aware of any language construct that allows for a DD name to be
> randomly selected in a program. On z/OS
All ethe way back to OS/360:
OPEN FILE (file-expr) TITLE (expression);
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
________________________________________
From: IBM Mainframe Discussion List [[email protected]] on behalf of
Lizette Koehler [[email protected]]
Sent: Wednesday, December 30, 2020 3:55 PM
To: [email protected]
Subject: Re: Using symbolic DD names
So the question becomes, can your Program handle a constantly changing DD Name?
What would be the benefit from doing this?
In Cobol you predefine (If I am allowed to use this word) the IO Section.
Which specifies the DD name - consider that hard coded.
I am not aware of any language construct that allows for a DD name to be
randomly selected in a program. On z/OS
I would be interested if anyone has an example.
And yes Scheduling products can supply symbolics where native z/OS might now.
Could you provide an example where your program when it executes would use a
random DD name in JCL?
Lizette
-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of
Billy Ashton
Sent: Wednesday, December 30, 2020 12:22 PM
To: [email protected]
Subject: Using symbolic DD names
Hey folks! I have a vendor product program that looks for different DDnames
depending on the control statements passed into the program. Is there any way
to define a dynamic DD statement using JCL symbols? For example, I would love
to have //TB&tno.DAT to correspond to TB01DAT, TB14DAT, or TB67DAT if I use SET
TNO=01 or 14 or 67.
Is such a thing possible? I tried using an instream proc definition and INCLUDE
MEMBER= that proc name, but that failed, and of course, I tried the straight up
JCL as above, and it failed.
What do you all think?
Billy
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