Can pipelined functions' return values be used in WHERE clause?

Question

If I have function MY_FUNC that returns a REFCURSOR with columns COL1, COL2, COL3
can I use the values returned in the output cursor in my WHERE clause as well as in the SELECT clause?
e.g.
SELECT COL1, COL2, COL3
FROM TABLE(MY_FUNC(param1, param2))
WHERE COL1 = 24 AND COL2=25
Would that be proper SQL?

Answer 1

Hi,
SQL> Create OR Replace Package Pkg_Test_ Is
  2 
  3     Type my_typ Is Table Of Number;
  4 
  5     Function fnc_test Return my_typ Pipelined;
  6 
  7  End;
  8  /
Package created
SQL> Create OR Replace Package Body Pkg_Test_ Is
  2 
  3     Function fnc_test Return my_typ
  4        Pipelined Is
  5        va_typ my_typ := my_typ();
  6     Begin
  7        For i IN 1 .. 10 Loop
  8           va_typ.Extend;
  9           va_typ(va_typ.Count) := i;
10           Pipe Row(va_typ(va_typ.Count));
11        End Loop;
12        Return;
13     End;
14 
15  End;
16  /
Package body created
SQL> SELECT *
  2    FROM Table(PKG_TEST_.FNC_TEST)
  3   WHERE COLUMN_VALUE > 5
  4  /
COLUMN_VALUE
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          10Regards,
Christian Balz