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niks_jude
Warnings : 1
Active User
Joined: 01 Dec 2006
Posts: 144
Location: Mumbai
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I have defined my file section entry like this.
FD FBPFILE-FILE
RECORD CONTAINS 6000 CHARACTERS
BLOCK CONTAINS 0 RECORDS
RECORDING MODE IS F.
01 FBPFILE-CASE-REC-AREA PIC X(6000).
COPY PTUBFPCR.
The copybook PTUBFPCR has its own 01 variable.
My question is that - When I read file into FBPFILE-CASE-REC-AREA variable, the copybook is also populated. I am not sure why this is happening because FBPFILE-CASE-REC-AREA and 01 variable of the copybook are 2 entirely different variables. |
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mmwife
Super Moderator
Joined: 30 May 2003
Posts: 1592
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Hey Jude,
The 01 levels in an FD are treated as redefs of each other, so if you READ INTO either 01, it uses the same area of the file buffer and any lower level variable of either 01 can be referenced from the PD. |
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Craq Giegerich
Senior Member
Joined: 19 May 2007
Posts: 1512
Location: Virginia, USA
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| niks_jude wrote: |
I have defined my file section entry like this.
01 FBPFILE-CASE-REC-AREA PIC X(6000).
COPY PTUBFPCR.
The copybook PTUBFPCR has its own 01 variable.
My question is that - When I read file into FBPFILE-CASE-REC-AREA variable, the copybook is also populated. I am not sure why this is happening because FBPFILE-CASE-REC-AREA and 01 variable of the copybook are 2 entirely different variables. |
That is standard COBOL processing. |
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revel
Active User
Joined: 05 Apr 2005
Posts: 135
Location: Bangalore/Chennai-INDIA
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Hi jude
| Quote: |
| When I read file into FBPFILE-CASE-REC-AREA variable, the copybook is also populated. I am not sure why this is happening because FBPFILE-CASE-REC-AREA and 01 variable of the copybook are 2 entirely different variables |
This is because, The 01 Variables in FILE SECTION is treated as REDEFINING Items
say
01 WS-GROUP-1 PIC X(80)
01 WS-GROUP-2 PIC X(50)
WHICH INTERNALLY REDEFINED
Ie WS-GROUP-2 REDEFINES WS-GROUP-1 AND WS-GROUP-2 WILL HAVE A VALUE OF WS-GROUP-1 TILL 50 BYTES.. |
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niks_jude
Warnings : 1
Active User
Joined: 01 Dec 2006
Posts: 144
Location: Mumbai
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| That answers my question. Thank you. |
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