numeric overflow in 10g
- From: "Herring Dave - dherri" <Dave.Herring@xxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 24 Oct 2008 11:27:33 -0500
Has anyone run into this issue in 10g? We're running 10.2.0.4 on RHEL 4.x.
We've hit something matching bug 3591135:
declare
v_base number;
begin
v_base:= 100000000 * 22;
dbms_output.put_line ('Success');
end;
/
*
ERROR at line 1:
ORA-01426: numeric overflow
ORA-06512: at line 4
I change the literal "22" to either "21" or "22.0" and it works. According to
what I've found on Metalink, Oracle doesn't view this as a bug:
The following has been added to the "Upgrading SQL*Plus Scripts and PL/SQL"
section of Database Upgrade Guide:
.
Evaluation of Numeric Literals
-------------------------------
Evaluation of numeric literals has changed in 10g such that at least one of the
constants in a numeric computation with literals must be a decimal specified to
the 10th place. This is because 10g uses INTEGER arithmetic (approximately 9
significant digits) for some expressions whereas Oracle 9i release 2 used
NUMBER arithmetic (approximately 38 significant digits). Therefore, if you are
dealing with results of greater than 9 significant digits, one of the literals
should be in decimal format to prevent numeric overflow errors. For example,
in release 10g the computation of v1 in the following example causes a numeric
overflow error.
.
DECLARE
v1 NUMBER(38);
BEGIN
v1 := 256*256*256*256;
DBMS_OUTPUT.PUT_LINE(v1);
END;
/
.
The solution to the error is to specify one of the numeric literals as a
decimal (256.0), as follows:
.
DECLARE
v1 NUMBER(38);
BEGIN
v1 := 256*256*256*256.0;
DBMS_OUTPUT.PUT_LINE(v1);
END;
That's just great, but its happening with Affinium Campaign and they can't seem
to reproduce the issue in their tests, even with our data and matching Oracle
install. Plus I'd rather not rely on them.
Dave
___________________________________
Dave Herring, DBA | A c x i o m M I C S / C S O
630-944-4762 office | 630-430-5988 wireless | 630-944-4989 fax
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