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Why is SORT rearranging records that are already sorted?


IBM Mainframe Forums -> DFSORT/ICETOOL
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cschablow

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Joined: 23 Jan 2018
Posts: 1
Location: USA

PostPosted: Wed Jan 24, 2018 10:14 pm
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I have several jobs that bring in multiple interface files, some of which have the same value in the sort columns (there's a potential to have additional values), so they are basically already sorted.

The jobs have been updated to always sort the input file, but the files that are already "sorted" are changed:

SORT card:
Code:
SORT  FIELDS=(1,3,CH,A)


Input file:
Code:
********************************* Top of Data *****************
001$CRESER122517 032000    AK80-04   D00000001928          AL09
001$CRESER122517 522090    AK80-04   C00000000964          AL09
001$CRESER122517 290061    AK80-04   C00000000964          AL09
001$CRESER122517 117001    AL09-01   D00000001928          AK80
001$CRESER122517 032000    AK82-04   D00000002122          AL09


Sorted file:
Code:
********************************* Top of Data *****************
001$CRESER122517 032000    AK80-04   D00000001928          AL09
001$CRESER122517 032000    OK06-06   D00000000000          TX46
001$CRESER122517 290061    UT04-04   C00000000000          WY05
001$CRESER122517 117001    WY05-01   D00000000000          UT04
001$CRESER122517 032000    WI02-02   D00000000000          WY05


Does anyone know how to avoid this?

Coded - do it yourself next time
You found the underline tags so using the code tags should be a doddle.
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prino
Warnings : 1

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Joined: 07 Feb 2009
Posts: 1238
Location: Vilnius, Lithuania

PostPosted: Wed Jan 24, 2018 10:40 pm
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Read about stable and unstable sorts.
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daveporcelan

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Joined: 01 Dec 2006
Posts: 747
Location: Pennsylvania

PostPosted: Wed Jan 24, 2018 10:50 pm
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SORT FIELDS=(1,3,CH,A) ,EQUALS

This will retain input order on equal keys.

Believe it or not, this is in the manual. icon_redface.gif
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enrico-sorichetti

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Joined: 14 Mar 2007
Posts: 10712
Location: italy

PostPosted: Wed Jan 24, 2018 10:57 pm
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Quote:
A COBOL Mainframe guru,

does not read no steenking manuals
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Nic Clouston

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Joined: 10 May 2007
Posts: 2448
Location: Hampshire, UK

PostPosted: Thu Jan 25, 2018 2:55 am
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Nothing to do with JCL. Moved to DFSort on the assumption that that is your sort product.
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