Calculation problem

Question

how can i make a function that takes a String parameter (math expression) and return the calculated result.
function calc(str_exp in varchar2) return number is
Result number;
begin
*// logic here*
return(Result);
end
if i call it as r = calc(' 2+3*2') then it should return 8
Edited by: Aasem on Feb 25, 2009 10:12 AM

Answer 1

Hi ,
I implemented like this ,
I created a function,
create or replace function cal (strin in varchar2) return number is
resul number;
begin
resul := to_number(strin);
return (resul);
end;
then I called the executed the following line Sql developer,
declare
resul number;
begin
resul:= cal(to_char(2+(3+2)+(8-2)+(3*2)));
dbms_output.put_line('Result'||'----'||resul);
end;
and it gave me 19 as a result.
Thanks,
Pavan.