您可以使用元數據表來獲取特定子分區名稱:
SQL> insert into log values (1, sysdate, 'FOO');
1 row(s) inserted.
SQL> SELECT p.partition_name, s.subpartition_name, p.high_value, s.high_value
2 FROM user_tab_partitions p
3 JOIN
4 user_tab_subpartitions s
5 ON s.table_name = p.table_name
6 AND s.partition_name = p.partition_name
7 AND p.table_name = 'LOG';
PARTITION_NAME SUBPARTITION_NAME HIGH_VALUE HIGH_VALUE
--------------- ------------------ ------------ ----------
OLDVALUES OLDVALUES_OTHERS 2010-01-01 DEFAULT
OLDVALUES OLDVALUES_LOGIN 2010-01-01 'FOO'
SYS_P469754 SYS_SUBP469753 2012-10-01 DEFAULT
SYS_P469754 SYS_SUBP469752 2012-10-01 'FOO'
SQL> alter table log drop subpartition SYS_SUBP469752;
Table altered.
如果要動態刪除分區,它可能會非常棘手與ALL_TAB_SUBPARTITIONS
觀點,因爲HIGH_VALUE
找到它列可能不容易查詢。在這種情況下,你可以使用DBMS_ROWID
找到一個給定行的子分區object_id
:
SQL> insert into log values (4, sysdate, 'FOO');
1 row(s) inserted.
SQL> DECLARE
2 l_rowid_in ROWID;
3 l_rowid_type NUMBER;
4 l_object_number NUMBER;
5 l_relative_fno NUMBER;
6 l_block_number NUMBER;
7 l_row_number NUMBER;
8 BEGIN
9 SELECT rowid INTO l_rowid_in FROM log WHERE id = 4;
10 dbms_rowid.rowid_info(rowid_in =>l_rowid_in ,
11 rowid_type =>l_rowid_type ,
12 object_number =>l_object_number,
13 relative_fno =>l_relative_fno ,
14 block_number =>l_block_number ,
15 row_number =>l_row_number );
16 dbms_output.put_line('object_number ='||l_object_number);
17 END;
18/
object_number =15838049
SQL> select object_name, subobject_name, object_type
2 from all_objects where object_id = '15838049';
OBJECT_NAME SUBOBJECT_NAME OBJECT_TYPE
--------------- --------------- ------------------
LOG SYS_SUBP469757 TABLE SUBPARTITION
如果你谷歌的「drop subpartition for」,你實際上會找到一個涵蓋該語法的專利申請。 8 {{}軟件專利會變得更加邪惡嗎? http://www.patentstorm.us/applications/20080313133/description.html –
它於2013年發佈http://www.google.com/patents/US8356014(新鏈接,因爲我在hstoerr的鏈接中看不到任何內容) – jmsu