Need to alter maxvalue for one Partition table

Question

Hi Guru's,
We have a table xyz with monthly partitions but tablespaces are in yearly basis.
we created the required partitions using exchange partition. Now the Partition for Dec 2007 is having range of MAXVALUE.
But our requirement is to add partition for 2008 now.
So we want to create 12 monthly partitions for 2008 and with a tablespace for that.
but how to change the MAXVALUE to 2008010100 for the partition DEC2007.
Appreciate any quick help !!

Answer 1

You can split the last partition to change the partition boundaries.
SQL> r
  1  create table t(a date)
  2  partition by range(a)(
  3  partition p1 values less than (to_date('01.12.2007','dd.mm.yyyy')),
  4* partition p2 values less than (maxvalue))
Table created.
SQL> alter table t split partition p2 at (to_date('01.01.2008','dd.mm.yyyy'))
  2  into (partition p2,partition p3);
Table altered.
SQL> set lines 200
SQL> r
  1  select PARTITION_NAME,HIGH_VALUE from user_tab_partitions
  2* where table_name='T'
PARTITION_NAME                 HIGH_VALUE
P1                             TO_DATE(' 2007-12-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA
P2                             TO_DATE(' 2008-01-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA
P3                             MAXVALUE