Function-accept any datatype as an input param,return the result in cursor

I am trying to create a function which will accept any datatype as an input parameter and return the result in cursor.
Any thoughts?
I searched the web and came to know that there is a type called "ANYDATA" in Oracle 10g which will allow to accept any datatype variable.
But we are using oracle 8i.

I believe you are looking for an implementation of "generic functions" (Java) or "templates" (C++) in PL/SQL. I believe there is no such language feature.
Perhaps the best solution would be to convert the incoming data into a common type, and then call a common function from each of the overloaded functions.
realWork (int n) { [work]; return result; }
myFunction (varchar2 v) { n = to_number(v); return realWork(n); }
myFunction (char c) { n = to_number(c); return realWork(n); }
myFunction (date d) { n = to_char(to_number(d)); return realWork(n); }
etc. ?

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I'm using Oracle 11G database and APEX 4.0.2.00.06
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I am trying to calculate the sum of salaries of all persons with a particular JOB_ID using a function TOTAL_INCOME(v_job_id).
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Dear,
If everything you will do will be done inside PL/SQL (stored procedure or stored function) then you don't have to care about bind variable.
When using PL/SQL (static SQL) you will never encounter issues related to bind variables. PL/SQL itself takes care of your code and uses bind variables behind the scene.
The only situation where you have to look carefully to the use of bind variables within PL/SQL is when you use Dynamic sql into stored procedures or functions.
So, see in the light of the above comment, if you have to care about returning your function into a bind variable?
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Function-accept any datatype as an input param,return the result in cursor

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