How to select Subpartition name in a Select query?

Question

Hi,
I have a table that is partitioned on date range and subpartitioned based on and ID list. Lets assume the table name is something like: MY_TABLE
The partition name would look like: P_20110126160527
The subpartition list is as follows: GB, IN, AU, US etc. The sub partition name for GB would look like
P_20110126160527_GB
I need to run a select query to fetch data from MY_TABLE along with Sub partition name. The result set needs to look like:
Name|Location|SubPartition
Sam|UK|P_20110126160527_GB
Tom|UK|P_20110126160527_GB
Dave|AU|P_20110126160527_AU
The data available in ALL_TAB_SUBPARTITIONS and USER_TAB_SUBPARTITIONS can't be used just because the only join condition available is the TABLE Name but we would also have to join on SUBPARTITION KEY. I am not sure how to achieve this.
Does anyone here have a clue?

Answer 1

In a pinch, you could do something like this.
select col1, col2, col3, 'PARTITION_1' from your_table where key_col in <values for partition_1>
union all
select col1, col2, col3, 'PARTITION_2' from your_table where key_col in <values for partition_2>
union all
select col1, col2, col3, 'PARTITION_3' from your_table where key_col in <values for partition_3>
union all
...Or better yet:
select col1, col2, col3, case when key_col = 'x' then 'PARTITION_1'
                              when key_col = 'y' then 'PARTITION_2'
                              when key_col = 'z' then 'PARTITION_3'
                         end
from ...Of course, none of these would be "dynamic".