the number of floats Limitesuperieure

Hi all
If I run the following:
declare
a number;
gf nvarchar2(10);
begin
  a := 1.0e126;
   dbms_output.put_line(a);
   dbms_output.put_line('lll');
end;
/   
Give me
ORA-06550: riga 5, colonna 8:
PLS-00569: numeric overflow or underflow
ORA-06550: riga 5, colonna 3:
and thi is ok the upper limit for the number of floats is e-126 no includeded.


But if I run the following:
declare
a number;
gf nvarchar2(10);
begin
  a := 1.0e-131;
   dbms_output.put_line(a);
  end;
/   
I expect to receive an error because the lower link (absolute value) to the decimal number is e-130, but that's not why?

Thank you very much
F.

Published by: francy77 on March 11, 2013 14:36

francy77 wrote:
Hi all
If I run the following:

declare
a number;
gf nvarchar2(10);
begin
a := 1.0e126;
dbms_output.put_line(a);
dbms_output.put_line('lll');
end;
/   

Give me

ORA-06550: riga 5, colonna 8:
PLS-00569: numeric overflow or underflow
ORA-06550: riga 5, colonna 3:

and thi is ok the upper limit for the number of floats is e-126 no includeded.

But if I run the following:

declare
a number;
gf nvarchar2(10);
begin
a := 1.0e-131;
dbms_output.put_line(a);
end;
/   

I expect to receive an error because the lower link (absolute value) to the decimal number is e-130, but that's not why?

Thank you very much
F.

Published by: francy77 on March 11, 2013 14:36

Why do you expect a mistake? Read the docs: http://docs.oracle.com/cd/E11882_01/server.112/e26088/sql_elements001.htm#sthref117

"The NUMBERS data type stores zero as well as the results of positive and negative numbers fixed with absolute values of 1.0 x 10-130 but not including 1.0 x 10126. If you specify an arithmetic expression whose value has an absolute value is greater than or equal to 1.0 x 10126, Oracle returns an error. Each DIGITAL value requires 1 to 22 bytes. »

Tags: Database

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