Fresh off the heels of my earlier composite partitioning post, I just ran into this confusing issue:

SQL> alter table p_objects
  2          add partition p201410
  3                  values less than (to_date('2014/11/01','yyyy/mm/dd'))
  4          (
  5                  subpartition p201410_spdts values ('DTS')
  6                  , subpartition p201410_spfoo values ('FOO')
  7                  , subpartition p201410_spbar values ('BAR')
  8                  , subpartition p201410_spsys values ('SYS')
  9                  , subpartition p201410_spsysaux values ('SYSAUX')
 10          )
 11  tablespace tbs1
 12  ;
tablespace tbs1
*
ERROR at line 11:
ORA-14048: a partition maintenance operation may not be combined with other
operations

The error doesn't quite make it easy to determine what the problem is. Turns out that the tablespace/storage clause of the ALTER TABLE ... ADD PARTITION has to come prior to the subpartitions definition. Simply moving that part of the statement a few rows up yields success:

SQL> alter table p_objects
  2          add partition p201410
  3                  values less than (to_date('2014/11/01','yyyy/mm/dd'))
  4          tablespace tbs1
  5          (
  6                  subpartition p201410_spdts values ('DTS')
  7                  , subpartition p201410_spfoo values ('FOO')
  8                  , subpartition p201410_spbar values ('BAR')
  9                  , subpartition p201410_spsys values ('SYS')
 10                  , subpartition p201410_spsysaux values ('SYSAUX')
 11          )
 12  ;

Table altered.

Again, probably obvious to most of you. It wasn't as obvious to decipher when I was trying to add a partition with over 6,300 subpartitions. As always: