Urgent : ADO / OraOLEDB gives random PLS-00306: wrong number or types of arguments

Question

Hi people,
Using our production environment of Win2K AS, IIS 5.0 --> Win2K AS, COM+ / ADO, Oracle OLE DB 9i --> Solaris Oracle 9i we have a month of trace logs telling us that some calls to our PL/SQL package methods have the "PLS-00306: wrong number or types of arguments".
Closer examination of our development systems also revealed these errors that seem to occur fairly randomly. (No recompiles in the database [at least according to USER_OBJECT.TIMESTAMP] and no invalid packages or schema objects).
One call on a session will succeed (so there aren't any obvious syntax or data range boundary issues) and then with no obvious reason, a second call to the same package method will fail with the error message in the subject.
Anyone else seen this behaviour and know of a fix?
Thanks
Lachlan Pitts

Answer 1

Hi,
The temp in the package and the temp in the anonymous block that calls the package are two different data types. They (coincidentally) have exactly the same number and type of elements, just as they (coincidentally) have exactly the same name, but they are still different.
Since the type is declare in the package head, you can reference it from oputside the package. You don't have to create a similar type in the calling block: just reference the package type, like this:
declare
  v_out pkg_1.temp;
begin
    pkg_1.DoSomething( 'a', 'b',  v_out);
    dbms_output.put_line(v_out.val1);
end;