Convert delimited list of numbers from function to use in SELECT IN () quer

Question

Hey guys,
I have to create a view based on some conditions. I have to get only the rows with specific IDs. I do the calculations for the logic using a function which returns a delimited list of the IDs. When I use this string in the query, it gives me a "Invalid Number" error.
Here's the skeleton
Select table1.col, table2.col1, table2.col2, table2.col3
from table1, table2
where table2.col1 in (function(table1.col))
function() returns 12,34,564,7657 ....
The reason that I am using a function to get the IDs is that the logic involved is complicated to get the right IDs. Any help would be appreciated
Thanks,
-P

Answer 1

You can do this.
select emp.* from  emp,
table (sys.dbms_debug_vc2coll (7499,7788,7934))
where empno = column_value
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM     DEPTNO
      7499 ALLEN      SALESMAN        7698 20-FEB-81       1600        300         30
      7788 SCOTT      ANALYST         7566 19-APR-87       3630                    20
      7934 MILLER     CLERK           7782 23-JAN-82       1300