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How to reverse record position in ESDS?

 
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murmohk1

Senior Member


Joined: 29 Jun 2006
Posts: 1439
Location: Bangalore,India

PostPosted: Fri Jul 07, 2006 9:34 am    Post subject: How to reverse record position in ESDS?
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Hi,

How do we can copy an existing ESDS records to another ESDS/Flat file in reverse order? (Assumption - # of records unknown, should not use any Language)

Example - Assuming we have 5 records in ESDS-

1st Record
2nd Record
3rd Record
4th Record
5th Record

New ESDS/Flat file should look like

5th Record
4th Record
3rd Record
2nd Record
1st Record

Regards,
Murali Mohan K
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parikshit123

Active User


Joined: 01 Jul 2005
Posts: 269
Location: India

PostPosted: Fri Jul 07, 2006 9:52 am    Post subject:
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Hi,
I believe sort can be used for this.
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murmohk1

Senior Member


Joined: 29 Jun 2006
Posts: 1439
Location: Bangalore,India

PostPosted: Fri Jul 07, 2006 10:18 am    Post subject:
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Hi,


Can you anyone provide the code?

Regards,
Murali Mohan K
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Frank Yaeger

DFSORT Moderator


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

PostPosted: Fri Jul 07, 2006 8:24 pm    Post subject:
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Here's a DFSORT job to do what you asked. I assumed your ESDS has fixed 80-byte records. But you can change the job appropriately for other attributes.

Code:

//S1 EXEC PGM=ICEMAN
//SYSOUT DD SYSOUT=*
//SORTIN DD DSN=...   original ESDS
//SORTOUT DD DSN=...  new ESDS
//SYSIN DD *
  RECORD TYPE=F
* Add sequence number.
  INREC OVERLAY=(81:SEQNUM,8,ZD)
* Sort in descending order on sequence number.
  SORT FIELDS=(81,8,ZD,D)
* Remove sequence number.
  OUTREC BUILD=(1,80)
/*
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