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ram_vizag
Active User
Joined: 21 Aug 2008
Posts: 112
Location: hyd
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Hi,
suppose if i declare a field in db2 table with decimal data type
field decimal(9,2) in a table,
1)how many bytes it will take in db2 and how many bytes it will take in cobol??
2) In COBOL, above declaration would result in 9(9)V2 or 9(7)v2.
Kindly clarify.
Ram |
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Bill O'Boyle
CICS Moderator
Joined: 14 Jan 2008
Posts: 2501
Location: Atlanta, Georgia, USA
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It's most likely 5-Bytes packed-decimal with two implied decimal points.
This is similar to a PL/I definition.
COBOL would be S9(07)V99 COMP-3.
HTH....
Mr. Bill |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello,
| Quote: |
| 1)how many bytes it will take in db2 and how many bytes it will take in cobol?? |
Why would you think the number of bytes would not be the same every this was used? If you have a field that takes 5 or 7 or 9 bytes in a file, how could it ever differ by programming language or tool usage?
Data is the same regardless of where used - it cannot be otherwise. Imaging the disaster if the sort created 7 bytes and Easytrieve believed the length was 5.
Possibly i misunderstand the concern. . . |
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enrico-sorichetti
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Manish Prabhakar Gokhare
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Joined: 20 Aug 2011
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jerryte
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Joined: 29 Oct 2010
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Location: Toronto, ON, Canada
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When a column is defined as DECIMAL(#,#) then the first number is the total number of digits including the ones to the right of the decimal point. The second number is the number of digits to the right of the decimal point. So the number of digits to the left of the decimal point is the first number minus the second number.
Thus the largest number that can be stored in DECIMAL(9,2) is 9999999.99 (there are 7 digits to the left and 2 digits to the right).
In COBOL this is a packed decimal field which uses 1 byte for every 2 digits plus an extra nibble (half a byte) for the sign. It is recommended to use an odd number as the precision so that you can make best use of the total bytes allocated.
For DECIMAL(9,2) the cobol field is PIC S9(7)V99 COMP-3.
The DB2 SQL Reference manual chapter 2 has a section on Data Types. |
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