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JCL for PS(I/P) -> table(Select query) -> PS(O/P)

 
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nkothako

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Joined: 26 Nov 2008
Posts: 125
Location: chennai

PostPosted: Sat Jan 04, 2014 12:45 am    Post subject: JCL for PS(I/P) -> table(Select query) -> PS(O/P)
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I/P
1 - 8 char
9 - 12 char
13-16 char

Select query
select col1,col2, col3, col4 ...etc., from table a
where col1(1-8 i/p file) and col2(9-12 i/p file) and col3(13-16 i/p file)

o/p
The result of select query output should be written in output file

note : My input file can be blank and at that time JCL should write all the rows of the table(col1, col2, col3,col4...etc..)

Is this possible using JCL without writing a cobol pgm...
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Akatsukami

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Joined: 03 Oct 2009
Posts: 1788
Location: Bloomington, IL

PostPosted: Sat Jan 04, 2014 1:05 am    Post subject:
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Of course, you are jesting with us, as after more than five years you must know that JCL does nothing but establish environments and execute programs.

To fulfill your goal, I recommend SQL formatted by Rexx and executed by DSNTIAUL.
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daveporcelan

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Joined: 01 Dec 2006
Posts: 714
Location: Pennsylvania

PostPosted: Sat Jan 04, 2014 1:25 am    Post subject:
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The TS failed to tell us how many possible input records there could be.
Or the amount of data on the table.

The SQL may be:
IF ((col1 = '12345678' and col2 = '1234' and col3 = '1234') or
(col1 = '12345678' and col2 = '1234' and col3 = '1234') or
(col1 = '12345678' and col2 = '1234' and col3 = '1234') ......

An alternate approach....
Code:
STEP 1 - Sort to check if Input data exists
IF STEP1.RC=4   THEN DO (empty file)
   STEP2 DB2 Unload (all the data)
ELSE DO
   STEP3A DB2 Unload (all the data)
   STEP3B SORT JOINKEYS on Input file and DB2 Unload Data creating selected output file
END
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Akatsukami

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Joined: 03 Oct 2009
Posts: 1788
Location: Bloomington, IL

PostPosted: Sat Jan 04, 2014 1:41 am    Post subject:
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daveporcelan wrote:
An alternate approach....
Code:
STEP 1 - Sort to check if Input data exists
IF STEP1.RC=4   THEN DO (empty file)
   STEP2 DB2 Unload (all the data)
ELSE DO
   STEP3A DB2 Unload (all the data)
   STEP3B SORT JOINKEYS on Input file and DB2 Unload Data creating selected output file
END

A good idea; I hadn't thought of doing that way, but it's probably better than my recommendation.
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