Calling function within function as parameter

Question

We're planning to switch from MS-OLEDB to Oracle OLEDB and are expecting several troubles.
One of these is that MS supports calling functions with another function within whilst Oralce does not?
Example (works fine with MS):
{? = call *<FUNCTION_1>* ( ?, ?, *<FUNCTION_2>* ( ?, ?, ? ) + 1, ?, 1 )}
This raises ORA-01036: Variablenname/-nummer ungültig with Oracle's OLEDB.
Any ideas?
Thanks in advance!
Edited by: user617919 on 04.11.2011 01:28

Answer 1

Hi,
Whenever you have a problem, please post a complete test script that people can run to re-create the problem and test their ideas. In this case, include complete CREATE PACKAGE and CREATE PAGKAGE BODY statements, CREATE TABLE and INSERT statements for any tables needed, some test calls to the the package, and the results you want from those test calls gibven that data.
Always say which versin of Oracle you're using (e.g. 11.2.0.2.0).
See the forum FAQ {message:id=9360002}
LostNoob wrote:
--Calculate salary minus before tax deductions
FUNCTION sal_mns_btd (emp_no IN NUMBER)
RETURN NUMBER
IS
tot_mns_btd Number;
BEGIN
SELECT e.sal - bef_tax_ded(bef_ded_tot)
INTO  tot_mns_btd
FROM  emp
WHERE empno = emp_no;
RETURN tot_mns_btd;
END sal_mns_btd;
If bef_tax_ded is a function in the same package, then what you posted is a correct way to call it.
What is bef_ded_tot? If it's a NUMBER column in emp, then what you posted makes sense. If bef_ded_tot is a local variable inside some other function, then it doesn't make sense.. How to do what you want depends on what you want, and I can't tell you how to do it unless I understand what you want.
Also, the table alias e isn't defined. It doesn't look like you need a table alias.