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REDIFINES with different PIC clause and size


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minikaushik

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Joined: 03 Jul 2007
Posts: 1
Location: banglore

PostPosted: Wed Jul 11, 2007 7:01 pm
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Everywhere its written that REDEFINES can be used for different data description entries and sizes.

and is this feasible?

01 dn1 pic a(5).
01 dn2 REDEFINES pic 9(10).
(in this data types different and we are redefining a small storage location with a bigger one)

or..............

01 dn1 pic x(10).
01 dn2 REDEFINES pic 9(5).
(in this we are redefining a large storage size with a smaller one)

Regards,
Mini kaushik
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William Thompson

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Joined: 18 Nov 2006
Posts: 3156
Location: Tucson AZ

PostPosted: Wed Jul 11, 2007 7:47 pm
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Yes, it is feasible.
The larger redefining the smaller might raise a warning, but COBOL will take care of everything.
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nagasri83

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Joined: 20 May 2005
Posts: 15
Location: chennai

PostPosted: Thu Jul 12, 2007 5:05 am
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It is feasible, but people never do this type of coding with different lengths as the data will be truncated.

There are few chances that your program end with Data exception error (S0C7) even if you use same length.

Quote:

Data Division.
01 dn1 pic X(5).
01 dn2 REDEFINES pic 9(5).
....

Procedure Division.
....
Move 'test1' to dn1.
Display 'Data in redefine clause: ' dn2.
....


After executing the above code, you program fails at Display statement as dn2 is declared as numeric but logical storage space contains alphanumeric.

If your not clear, you can try the above way and see the result.
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William Thompson

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Joined: 18 Nov 2006
Posts: 3156
Location: Tucson AZ

PostPosted: Thu Jul 12, 2007 9:37 am
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nagasri83 wrote:
It is feasible, but people never do this type of coding with different lengths as the data will be truncated.
What? Never? Truncated? I think not.......
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