oracle partition by group_id and subpartition monthly

Question

I want to create a table like this.

create table some_data ( 
  id number(19,0),
  group_id number(19,0),
  value float,
  timestamp timestamp
);

For this table i would like to have the data stored like

 group_id=1
    jan-2015
    feb-2015
    ...
group_id=2
    jan-2015
    feb-2015
    ...    

and so on. So I assume i have to create a partition by range for the group_id and then a subpartition also by range with the timestamp column, right?

So it should look like this:

create table some_data ( 
  id number(19,0),
  group_id number(19,0),
  value float,
  timestamp timestamp
)
PARTITION BY RANGE (group_id)
SUBPARTITION BY RANGE ("TIMESTAMP") 
INTERVAL (NUMTOYMINTERVAL(1,'MONTH'))
(
 PARTITION part_1 values LESS THAN (TO_DATE('01.02.2015','DD.MM.YYYY'))
 );

Is this right? And also the question: With this partition, if a new group_id is added, will oracle create automatically a new partition for the new group_id and the new suppartitions for new data with new months?

Answer 1

Interval partitioning is not supported on subpartition level:

http://docs.oracle.com/cd/E11882_01/server.112/e41084/statements_7002.htm#SQLRF54559

You can define it like this:

create table some_data ( 
  id number(19,0),
  group_id number(19,0),
  value float,
  timestamp timestamp  -- not good naming
)
PARTITION BY RANGE ("TIMESTAMP")
INTERVAL (NUMTOYMINTERVAL(1,'MONTH'))
SUBPARTITION BY RANGE (group_id) -- it could be hash or list as well
   subpartition template(
     ...
   )
(
 PARTITION part_1 values LESS THAN (TO_DATE('01.02.2015','DD.MM.YYYY'))
);