Impossible stored procedure problem?

By my understanding, this should be impossible. Here's a snippet from a stored procedure:

create or replace procedure TESTPROCEDURE (

   INRCGID_PERSON in varChar2:=null,
   INRCGID_PROJECT in varChar2:=null,
   INnDMSFOLDERID in number:=null,
   INnGETALLFOLDERS in number :=1,
   INnGETALLFOLDERS_NOACLCHECK in number :=0,    INnGETSUBFOLDERS in number :=0,
   INnGETFOLDERFORTYPE in number:=0,
   INnGETPARENTFOLDER in number :=0,
   INnFOLDERTYPE in number:=0,
   INvcNODENAME in varchar2:=null,
   INRCGID_FOLDERID in varChar2:=null,
   INRCGID_PARENTFOLDERID in varChar2:=null,    OUTnHASFOLDER out number, --size=10
   OUTcPARENTFOLDERID out varChar2, --size=14    retCur in out globalPkg.RCT1
)
is
getType number;
projectId varchar2(16);
persInGrp number:=0;

begin

if INNGETALLFOLDERS is null then
insert into debug_dump values('NULL',sysdate); else
insert into debug_dump values('NOT NULL',sysdate); end if;

By my understanding, this if statement should ALWAYS insert 'NOT NULL' since the parameter INNGETALLFOLDERS has a default value of 1.

But thats not what is happening. Somehow, we are getting 'NULL' inserted.

This is blowing up the procedure. What do I do? Am I right in saying this can't happen? Or do I have a false assumption here?

This is, as far as I know, running on the latest version of Oracle 9i. Received on Tue May 20 2003 - 17:19:38 CDT