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Using OVERLAY to replace PD
IBM Mainframe Forums -> DFSORT/ICETOOL
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skommawar1

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Joined: 03 Aug 2012
Posts: 1
Location: Hyderabad
PostPosted: Wed Aug 08, 2012 2:36 pm
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Frank Yaeger wrote:
Here are two different ways to do this with DFSORT:

Code:

//S1    EXEC  PGM=ICEMAN
//SYSOUT    DD  SYSOUT=*
//SORTIN DD DSN=...  input file
//SORTOUT DD DSN=...  output file
//SYSIN    DD    *
  OPTION COPY
  INREC IFTHEN=(WHEN=(23,2,CH,EQ,C'01'),OVERLAY=(23:C'10'))
/*


Code:

//S2    EXEC  PGM=ICEMAN
//SYSOUT    DD  SYSOUT=*
//SORTIN DD DSN=...  input file
//SORTOUT DD DSN=...  output file
//SYSIN    DD    *
  OPTION COPY
  INREC OVERLAY=(23:23,2,CHANGE=(2,C'01',C'10'),NOMATCH=(23,2))
/*


You'll need z/OS DFSORT V1R5 PTF UQ95214 or DFSORT R14 PTF UQ95213 (Dec, 2004) in order to use DFSORT's IFTHEN and OVERLAY functions. Only DFSORT has these functions, so if you don't have DFSORT, you won't be able to use them. If you do have DFSORT, but you don't have the Dec, 2004 PTF, ask your System Programmer to install it (it's free). For complete details on all of the new DFSORT and ICETOOL functions available with the Dec, 2004 PTF, see:

Use [URL] BBCode for External Links


By using OVERLAY option can we change the Packed Decimal filed value also and is there any difference in the OVERLAY syntax for PD fields? Please suggest me.
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Bill Woodger

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Joined: 09 Mar 2011
Posts: 7309
Location: Inside the Matrix
PostPosted: Wed Aug 08, 2012 2:48 pm
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Please don't tailgate an old topic. A very old topic. New question, new topic.

Yes, you can do PD (and any type of data) with OVERLAY. Full details in the manuals, link in this forum and at the top of the page.
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Skolusu

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Joined: 07 Dec 2007
Posts: 2205
Location: San Jose
PostPosted: Wed Aug 08, 2012 11:05 pm
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skommawar1,

If you want to update a packed decimal value you can use either one of the following.

Code:

INREC IFTHEN=(WHEN=(5,4,PD,EQ,2),OVERLAY=(5:X'0000000C'))


This would make the PD value at position 5 a zero when the original value is 2.

You can use TO=PD also to achieve the same result.
Code:

INREC IFTHEN=(WHEN=(5,4,PD,EQ,2),OVERLAY=(5:+0,TO=PD,LENGTH=4))
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