Description
This script creates a function to convert Hexadecimal value to decimal.
Example
SQL> select hextodec('BABA11') from dual;
HEXTODEC('BABA11')
------------------
12237329
Starting from Oracle 8i, there is a new format model(‘X’) for the to_number function which can be used to accomplish the same task. For the above example, you could issue the following:
SQL> select to_number('BABA11','XXXXXX') from dual;
TO_NUMBER('BABA11','XXXXXX')
----------------------------
12237329
Execution Environment:
SQL, SQL*Plus, iSQL*Plus
Access Privileges:
No special privileges are required to run this script.
Usage:
$ sqlplus [user]/[pw]@[SCRIPTFILE]
The script
Create or replace FUNCTION hextodec (hexnum in char) RETURN number IS
x number;
digits number;
result number := 0;
current_digit char(1);
current_digit_dec number;
BEGIN
digits := length(hexnum);
for x in 1..digits loop
current_digit := upper(SUBSTR(hexnum, x, 1));
if current_digit in ('A','B','C','D','E','F') then
current_digit_dec := ascii(current_digit) - ascii('A') + 10;
else
current_digit_dec := to_number(current_digit);
end if;
result := (result * 16) + current_digit_dec;
end loop;
return result;
END;
/