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Finding whether file is empty or not - with few restrictions

 
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raam_kumar

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Joined: 25 Apr 2007
Posts: 44
Location: chennai, India

PostPosted: Wed May 14, 2008 7:40 pm    Post subject: Finding whether file is empty or not - with few restrictions
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Hi
i have a ps file, which will contain three type of records
1) Header record (with code AAA)
2) Data record (With code DAT)
3) Trailer record(with code BBB)

the requirement is, if there are no DAT records (data records) i have to report the file as empty file. is there a way to achieve this in sort.
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CICS Guy

Senior Member


Joined: 18 Jul 2007
Posts: 2150
Location: At my coffee table

PostPosted: Wed May 14, 2008 8:14 pm    Post subject:
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Take a look at "Set RC=12 or RC=4 if file is empty, has more than n records, etc" in Smart DFSORT Tricks
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Frank Yaeger

DFSORT Moderator


Joined: 15 Feb 2005
Posts: 7130
Location: San Jose, CA

PostPosted: Wed May 14, 2008 9:25 pm    Post subject:
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Quote:
i have to report the file as empty file.


What to you mean by "report the file as empty file"?

If you want a RC=12 when the file is empty or RC=0 when it isn't empty, you can use this DFSORT/ICETOOL job:

Code:
//S1    EXEC  PGM=ICETOOL               
//TOOLMSG DD SYSOUT=*                   
//DFSMSG  DD SYSOUT=*                   
//IN DD DSN=....  input file                         
//TOOLIN DD *                           
COUNT FROM(IN) EMPTY USING(CTL1)         
//CTL1CNTL DD *                         
  INCLUDE COND=(1,3,CH,EQ,C'DAT')       
/*


If you want a RC=4 instead of a RC=12, add RC4 to the COUNT operator.
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dick scherrer

Site Director


Joined: 23 Nov 2006
Posts: 19270
Location: Inside the Matrix

PostPosted: Wed May 14, 2008 9:52 pm    Post subject:
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Hello,

I believe the issue is when there are header and/or trailer records, but no data records.

The file is "logically" empty even though it has hdr/trlr records.
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Frank Yaeger

DFSORT Moderator


Joined: 15 Feb 2005
Posts: 7130
Location: San Jose, CA

PostPosted: Wed May 14, 2008 9:58 pm    Post subject:
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Yes, the INCLUDE for 'DAT' takes care of that. It only includes data records, not the header and trailer records, so the test for EMPTY is done against just the data records.
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