split partitions

[ndisang]

I was also looking a ask a question about partition split. I have this example that i saw somewhere out there...

ALTER TABLE my_table SPLIT PARTITION my_table_part AT (3)
INTO (PARTITION my_table_part_1,
PARTITION my_table_part_2);

then follows this select/verification
COLUMN high_value FORMAT A20
SELECT table_name,
partition_name,
high_value,
num_rows
FROM user_tab_partitions
ORDER BY table_name, partition_name;

TABLE_NAME PARTITION_NAME HIGH_VALUE NUM_ROWS
----------- ------------ --------- ---------- ------------- ----------
MY_TABLE MY_TABLE_PART_1 3 2
MY_TABLE MY_TABLE_PART_2 MAXVALUE 2

My questions is...where does the (3) as in At (3) above come from?
I would have thought it comes from the HIGH_VALUE column of the table to be split?
but my does not return anything..
SQL> select high_value from user_tab_partitions where table_name ='AAS_AON_FCT_2004_Q4';

no rows selected
Thanks