How to interpose a partition within two existing partitions?

Question

Hello,
the following question concerns Oracle 10g.
Suppose I have a simple partitioned thus table :
CREATE TABLE table2000
x int,
y int,
z date
PARTITION BY RANGE(z)
PARTITION PART_DEFAULT VALUES LESS THAN (MAXVALUE)
NOCACHE
NOPARALLEL
NOMONITORING;
I use a stored procedure which creates a new partition based on a date argument each time it is called and works by splitting
the default partition above (PART_DEFAULT):
CREATE OR REPLACE PROCEDURE CREATE_PARTITION_X(
     vTable IN VARCHAR2,
     vDate IN VARCHAR2
) IS
V varchar2(300);
BEGIN
v :='ALTER TABLE '|| vTable ||' SPLIT PARTITION PART_DEFAULT AT (to_date('''||vDate || ''',''YYYYMMDD'')) INTO (PARTITION PART_'||vDate ||',PARTITION PART_DEFAULT)';
execute immediate v ;
END CREATE_PARTITION_X;
To create partitions I run:
/* CREATE A PARTITION FOR "JAN 01 2009" DATA (note partition name corresponds to January 02 2009) */
1. SQL> CREATE_PARTITION_X('table2000','20090102');
/* CREATE A PARTITION FOR "JAN 03 2009" DATA */
2. SQL> CREATE_PARTITION_X('table2000','20090104');
/* CREATE A PARTITION FOR "JAN 04 2009" DATA */
3. SQL> CREATE_PARTITION_X('table2000','20090105');
Here is the problem: noting that I have skipped the partition creation for JANUARY 02 data, I run the following to create a suitable partition
SQL> exec CREATE_PARTITION_X('table2000','20090103');
But I get the error:
ORA-14080: partition cannot be split along the specified high bound
My question is: how do I create/interpose this 'missing' partition into this table?

Answer 1

In fact, more precisely than just splitting, one must split the existing partition that is chronologically greater than the one I want to insert.
So originally I had this:
SQL> select table_name,partition_name from user_tab_partitions WHERE table_name='TABLE2000';
TABLE_NAME ** PARTITION_NAME
=================================
TABLE2000 ** PART_20090102
TABLE2000 ** PART_20090104
TABLE2000 ** PART_20090105
TABLE2000 ** PART_DEFAULT
Then I split the partition PART_20090104 into PART_20090104 and PART_20090103 thusly:
SQL> ALTER TABLE table2000 SPLIT PARTITION PART_20090104 AT (to_date('20090103','YYYYMMDD')) INTO (PARTITION PART_20090104, PARTITION PART_20090103);
Table modified.
Now I have what I want:
SQL> select table_name,partition_name from user_tab_partitions WHERE table_name='TABLE2000';
TABLE_NAME ** PARTITION_NAME
====================================
TABLE2000 ** PART_20090102
TABLE2000 ** PART_20090103
TABLE2000 ** PART_20090104
TABLE2000 ** PART_20090105
TABLE2000 ** PART_DEFAULT
My one remaining question is this : is there a specific exception for this ORA-14080 so that I may react to such an error situation?