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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello Reddy,
Please read the post from the beginning. The initial post post says
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| --> i can't concatenate two file |
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kgumraj
Active User
Joined: 01 May 2006
Posts: 151
Location: Hyderabad
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Hi,
I can imagine only this: Using same DD name for the input files.
When I ran it only took the first input file.
But I didnt get the buisnees in doing so  |
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mmwife
Super Moderator
Joined: 30 May 2003
Posts: 1592
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Hi Anju,
There's a relatively new feature in COBOL (Eviroment Variables - I think) that allows the coder to change the FD stmt to define a different dataset than the one being currently used. It calls a subroutine "putenv", among other things. It's a fairly involved process.
Another approach is BPXWDYN, an interface to SVC 99.
I haven't used either of these so this is about all I know on the subject. |
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Anuj Dhawan
Superior Member
Joined: 22 Apr 2006
Posts: 6250
Location: Mumbai, India
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Hi,
If this is for me, then my name is Anuj not Anju
However,coming to the topic of thread..
OP says
so
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| that allows the coder to change the FD |
will not suffice the requirement of OP. As stated by you, subroutine 'putenv' will allow to change the FD of the same file while OP says
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| both file have the same attribute as well as the same FD entires |
, so he does not want to open the same file with different layout instead he wants to open a different file with the same layout. In a nutshell, there are two input files, with different data, but with same FD entries and he wants to refer both files with a single SELECT. |
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Earl
Active User
Joined: 17 Jun 2007
Posts: 148
Location: oklahoma
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I think you can only have max of 16 fd's per cobol program. was involved with project years ago that required using same fd in cobol
program. I used a dynamic allocation subroutine to change
the dataset name on the fly and then open/close the file as logically needed.
FD SAME-FD assign SAMEFD
..
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..
PROCEDURE DIVISION.
MOVE 'MYFILE.FILEONE' TO WS-FILE-NAME.
CALL 'DYDSN' USING WS-FILE-NAME, SAME-FD, 'SAMEFD'.
OPEN INPUT SAME-FD.
READ SAME-FD INTO WS-SAVE-FILEONE-RECORD.
CLOSE SAME-FD.
MOVE 'MYFILE.FILETWO' TO WS-FILE=NAME.
CALL 'DYDSN' USING WS-FILE-NAME, SAME-FILE.
OPEN INPUT SAME-FD
READ SAME-FD INTO WS-SAVE-FILETWO-RECORD.
PERFORM PROCESS-FILE-TWO.
....
...
.... |
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