From perldoc DBI Example 5 requires that you provide a stored procedure (SP_ISNULL in
this example) that acts as a function: it checks whether a value is
null, and returns 1 if it is, or 0 if not.

Here is a table that indicates which examples above are known to work
on various database engines:

                          -----Examples------
                          0  1  2  3  4  5  6
                          -  -  -  -  -  -  -
         Oracle 9         N  Y  N  Y  Y  ?  Y
         Informix IDS 9   N  N  N  Y  N  Y  Y
         MS SQL           N  N  Y  N  Y  ?  Y
         Sybase           Y  N  N  N  N  N  Y
         AnyData,DBM,CSV  Y  N  N  N  Y  Y* Y
[download]

So it looks as if executing Stored Procedures in Oracle
is a bit iffy.

HTH