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MAINFRAME - TIP OF THE DAY : All available storage is assigned to the job or jobstep, If REGION is coded 0K or 0M

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ursvmg
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PostPosted: Tue Jan 16, 2007 5:50 am    Post subject: Reg DFSORT utility. Reply with quote

Hi All,

I'm new to this mainframe ocean. I'm in a maintenance project.

I'm facing one problem in DFSORT utility. My JCL uses this utility to count the number of records in the input file and to create a trailer record depending on the number of records in the inpt file.

Here are the parameters it uses:

Code:

   MERGE   FIELDS=(2,16,CH,A)     
   INREC   FIELDS=(17C'9',C'000000010')
   SUM     FIELDS=(18,9,ZD)         
   OUTREC  FIELDS=(1,25,16C'0',224X)


The problem is, when the input file is empty, its not creating the output trailer record.

The output (trailer record) if there are some number of files in input will look like,
99999999999999999000006020000000000000000

where 602 is the no of records in the input file.
For an empty input, its not creating the output like
99999999999999999000000000000000000000000,
instead it is creating an empty output.

How can i overcome this problem.? Can anyone help me out.........?
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Frank Yaeger
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Joined: 18 Feb 2006
Posts: 812
Location: San Jose, CA

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PostPosted: Tue Jan 16, 2007 10:12 pm    Post subject: Reply with quote

That's a very indirect way to get a trailer record with the count, and the way it's set up it won't give you any output records when there are no input records. You can use the more direct method of using DFSORT's TRAILER1 and COUNT parameters, which will give you a record with a count of 0 when there are no input records. Here's a DFSORT job that will do what you asked for:

Code:

//S1 EXEC PGM=ICEMAN
//SYSOUT    DD  SYSOUT=*
//SORTIN DD DSN=...  input file
//SORTOUT DD DSN=...  output file
//SYSIN    DD    *
   OPTION COPY
   INREC   FIELDS=(265X)
   OUTFIL REMOVECC,NODETAIL,
     TRAILER1=(17C'9',COUNT=(M11,LENGTH=8),16C'0')
/*


If you're not familiar with DFSORT and DFSORT's ICETOOL, I'd suggest reading through "z/OS DFSORT: Getting Started". It's an excellent tutorial, with lots of examples, that will show you how to use DFSORT, DFSORT's ICETOOL and DFSORT Symbols. You can access it online, along with all of the other DFSORT books, from:

www.ibm.com/servers/storage/support/software/sort/mvs/srtmpub.html
_________________
Frank Yaeger - DFSORT Development Team (IBM) - yaeger@us.ibm.com
Specialties: JOINKEYS, FINDREP, WHEN=GROUP, ICETOOL, Symbols, Migration
=> DFSORT/MVS is on the Web at http://www.ibm.com/storage/dfsort
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ursvmg
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PostPosted: Wed Jan 17, 2007 3:15 am    Post subject: Thanks yaar Reply with quote

Hi Frank,
Thanks a lot for ur assistance. The link u provided is excellent. Also the piece of code.
Once again thanks a lot.

Regards,
Gobalakrishnan M
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Frank Yaeger
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PostPosted: Wed Jan 17, 2007 3:17 am    Post subject: Reply with quote

Glad I could help.
_________________
Frank Yaeger - DFSORT Development Team (IBM) - yaeger@us.ibm.com
Specialties: JOINKEYS, FINDREP, WHEN=GROUP, ICETOOL, Symbols, Migration
=> DFSORT/MVS is on the Web at http://www.ibm.com/storage/dfsort
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