Date range Partitioning

Question

Hello Gurus,
I have one table which i partioned by yearly.
select partition_name, num_rows from dba_tab_partitions where table_name='TEST_OMAN';
PARTITION_NAME NUM_ROWS
CHANGE_DATE_DEC2005 1278654
CHANGE_DATE_DEC2006 2867545
CHANGE_DATE_DEC2007 3657438
CHANGE_DATE_DEC2008 4563575
CHANGE_DATE_DEC2009 0
CHANGE_DATE_DEC2010 154
Here, is the procedure i used to partioned the table.
CREATE TABLE OMANPRD.TEST_OMAN (
NID NUMBER,
TICKET_NBR VARCHAR2(20),
CHANGE_DATE DATE,
CHANGE_DESC VARCHAR2(4000),
OPERATOR VARCHAR2(255),
TYPE VARCHAR2(255),
LAST_MODIFIED DATE
PARTITION BY RANGE (CHANGE_DATE)
(PARTITION CHANGE_DATE_DEC2010 VALUES LESS THAN (MAXVALUE));
ALTER TABLE OMANPRD.TEST_OMAN
EXCHANGE PARTITION CHANGE_DATE_DEC2010
WITH TABLE OMANPRD.TEST_OMAN2
WITHOUT VALIDATION
UPDATE GLOBAL INDEXES;
ALTER TABLE OMANPRD.TEST_OMAN
SPLIT PARTITION CHANGE_DATE_DEC2010 AT (TO_DATE('31-DEC-2005 23:59:59', 'DD-MON-YYYY HH24:MI:SS'))
INTO (PARTITION CHANGE_DATE_DEC2005,
PARTITION CHANGE_DATE_DEC2010)
UPDATE GLOBAL INDEXES;
ALTER TABLE OMANPRD.TEST_OMAN
SPLIT PARTITION CHANGE_DATE_DEC2010 AT (TO_DATE('31-DEC-2006 23:59:59', 'DD-MON-YYYY HH24:MI:SS'))
INTO (PARTITION CHANGE_DATE_DEC2006,
PARTITION CHANGE_DATE_DEC2010)
UPDATE GLOBAL INDEXES;
ALTER TABLE OMANPRD.TEST_OMAN
SPLIT PARTITION CHANGE_DATE_DEC2010 AT (TO_DATE('31-DEC-2007 23:59:59', 'DD-MON-YYYY HH24:MI:SS'))
INTO (PARTITION CHANGE_DATE_DEC2007,
PARTITION CHANGE_DATE_DEC2010)
UPDATE GLOBAL INDEXES;
ALTER TABLE OMANPRD.TEST_OMAN
SPLIT PARTITION CHANGE_DATE_DEC2010 AT (TO_DATE('31-DEC-2008 23:59:59', 'DD-MON-YYYY HH24:MI:SS'))
INTO (PARTITION CHANGE_DATE_DEC2008,
PARTITION CHANGE_DATE_DEC2010)
UPDATE GLOBAL INDEXES;
ALTER TABLE OMANPRD.TEST_OMAN
SPLIT PARTITION CHANGE_DATE_DEC2010 AT (TO_DATE('31-DEC-2009 23:59:59', 'DD-MON-YYYY HH24:MI:SS'))
INTO (PARTITION CHANGE_DATE_DEC2009,
PARTITION CHANGE_DATE_DEC2010)
UPDATE GLOBAL INDEXES;
Now, there is some records which has change_date not in the corrrect date format or Null value which i want to send them to defualt table.
Right now I think those all record which has change_date null value and wrong date format are going to CHANGE_DATE_DEC2010 154 which i want to remove it from that partition and send it to defualt table partition.
I have tried
ALTER TABLE OMANPRD.TEST_OMAN
SPLIT PARTITION CHANGE_DATE_DEC2010 AT (TO_DATE(' ', 'DD-MON-YYYY HH24:MI:SS'))
INTO (PARTITION CHANGE_DATE_DEFAULT,
PARTITION CHANGE_DATE_DEC2010)
UPDATE GLOBAL INDEXES;
but it gives me a error.
Please,put some light on it
Danny

Answer 1

ORA-14019: partition bound element must be one of: string, datetime or interval literal, number, or MAXVALUE
But there is some records which has no CHANGE_DATE column value.
I have tried (TO_DATE(' ','DD-MON-YYYY HH24:MI:SS'))
or (TO_DATE('0','DD-MON-YYYY HH24:MI:SS'))
or (TO_DATE('null','DD-MON-YYYY HH24:MI:SS'))
but same error