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Help with sort card to update a part of record.

 
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arvind.m

Active User


Joined: 28 Aug 2008
Posts: 205
Location: Hyderabad

PostPosted: Fri Sep 17, 2010 9:05 pm    Post subject: Help with sort card to update a part of record.
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Hi All,
I need to update my input file. But i have to update only first 2 records with different values.

file type: FB
rec len : 300
position of the variable to be updated: 30 with 8 bytes. (x(08))

and first record i need 'XXXXXX03' and second record i need 'XXXXXX13' where X is space and the rest of the records need to copied without any change.
I know we can manuplate any part of record with outrec, but i need ony first 2 recods with different value to be updated. Can anyone please help me with sort card.
thank you in advance.
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dick scherrer

Site Director


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

PostPosted: Fri Sep 17, 2010 9:24 pm    Post subject:
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Hello,

Quote:
I need to update my input file.
No, you need to make a copy with the changes and then use the copy (or delete/rename) for the other processing. It is unacceptable most places to destroy the input file. . .

One way to do what you want is to introduce a sequence number for each record and then only make the change to sequence 1 and 2.
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Frank Yaeger

DFSORT Moderator


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

PostPosted: Fri Sep 17, 2010 9:29 pm    Post subject:
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Here's a DFSORT job that will do what you asked for:

Code:

//S1 EXEC PGM=SORT
//SYSOUT DD SYSOUT=*
//SORTIN DD DSN=...  input file (FB/300)
//SORTOUT DD DSN=...  output file (FB/300)
//SYSIN DD *
  OPTION COPY
  INREC IFOUTLEN=300,
   IFTHEN=(WHEN=INIT,OVERLAY=(301:SEQNUM,8,ZD)),
   IFTHEN=(WHEN=(301,8,ZD,EQ,1),OVERLAY=(30:C'      03')),
   IFTHEN=(WHEN=(301,8,ZD,EQ,2),OVERLAY=(30:C'      13'))
/*
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