RE: Space Estimation & Performance (numbers)

From: Toepke, Kevin M <ktoepke_at_cms.cendant.com>
Date: Mon, 21 May 2001 10:28:01 -0700
Message-ID: <F001.00309784.20010521104032@fatcity.com>

Walter:

You use the "VSIZE()" function. And you are right about 10000 not taking the same amount of size as 99999. 10000 uses 2 bytes and 99999 uses 4.

SQL> select vsize(10000), vsize(99999) from dual;

VSIZE(10000) VSIZE(99999)
------------ ------------

2 4

Kevin

-----Original Message-----

Sent: Monday, May 21, 2001 1:56 PM
To: Multiple recipients of list ORACLE-L

Hi,

How do I calculate the amount of physical space required for storing a number? (i.e. NUMBER, NUMBER(5), NUMBER(10,5), etc.) I believe Oracle uses "2's compliment" for storing numbers. A value of 10000 does not seem to take up the same amount of space as 99999.

TIA!
-wk

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Author: Walter K
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Author: Toepke, Kevin M
INET: ktoepke_at_cms.cendant.com

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