Something in dba_segments but not in dba_objects

Question

Hi,
I think I met a bug. It's Oracle 11.1.0.7.0 Enterprise Edition 64bit on Oracle Enterprise Linux Server Release 5 Update 6.
I tried to drop a tablespace but cannot. The 'drop tablespace' returned error ORA-1561 saying there're some objects in the tablespace. So I checked the dba_segments and dba_extents, and there were some tables owned by SYS in the tablespace. Then I tried to drop the tables manually, but the 'drop table' returned with ORA-942 saying the table did not exist. I checked the dba_tables and dba_objects to ensure the existance of the table, but cannot find them.
As the result, I cannot drop the tablespace.
Anyone has any idea what I can do to drop the tablespace?
Here's the log:
[toracle@localhost etc]$ sqlplus /nolog
SQL*Plus: Release 11.1.0.7.0 - Production on Wed Jun 1 12:09:33 2011
Copyright (c) 1982, 2008, Oracle. All rights reserved.
SQL> conn / as sysdba;
Connected.
SQL> select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
PL/SQL Release 11.1.0.7.0 - Production
CORE 11.1.0.7.0 Production
TNS for Linux: Version 11.1.0.7.0 - Production
NLSRTL Version 11.1.0.7.0 - Production
SQL> drop tablespace tbs1 including contents and datafiles cascade constraints;
drop tablespace tbs1 including contents and datafiles cascade constraints
ERROR at line 1:
ORA-01561: failed to remove all objects in the tablespace specified
SQL> l
1 select owner, segment_type, segment_name
2 from dba_segments
3 where tablespace_name = 'TBS1'
4* and rownum < 3
SQL> /
OWNER SEGMENT_TYPE
SEGMENT_NAME
SYS TABLE
DELETEALLIANCE
SYS TABLE
DISTINCT_TXLOGDETAILS
SQL> drop table sys.DELETEALLIANCE;
drop table sys.DELETEALLIANCE
ERROR at line 1:
ORA-00942: table or view does not exist
SQL> select count(*)
2 from dba_objects
3 where object_name = 'DELETEALLIANCE';
COUNT(*)
0
SQL>
Thanks in advance!
Regards,
Chiyuan

Answer 1

column tablespace_name format a20
column "Name" format a45
break on file_id skip 1
ttitle &1SQL> SQL> SQL> SQL>
Enter value for 1: VHBA
SQL> select file_id, block_id, blocks, owner||'.'||segment_name "Name" from sys.dba_extents where tablespace_name = upper('&1')
2 UNION
3 select file_id, block_id, blocks, 'Free' from sys.dba_free_space where tablespace_name = upper('&1')
4 order by 1,2,3
5 /
Enter value for 1: VHBA
old 1: select file_id, block_id, blocks, owner||'.'||segment_name "Name" from sys.dba_extents where tablespace_name = upper('&1')
new 1: select file_id, block_id, blocks, owner||'.'||segment_name "Name" from sys.dba_extents where tablespace_name = upper('VHBA')
Enter value for 1: VHBA
old 3: select file_id, block_id, blocks, 'Free' from sys.dba_free_space where tablespace_name = upper('&1')
new 3: select file_id, block_id, blocks, 'Free' from sys.dba_free_space where tablespace_name = upper('VHBA')
Mon Apr 16 page 1
VHBA
FILE_ID BLOCK_ID BLOCKS Name
26 9 8192 SYS.PARTICRESPONSES
8201 8192 SYS.PARTICRESPONSES
16393 8192 SYS.PARTICRESPONSES
24585 8192 SYS.PARTICRESPONSES
32777 8192 SYS.PARTICRESPONSES
40969 8192 SYS.PARTICRESPONSES
49161 14840 Free
33 9 8192 SYS.PARTICRESPONSES
8201 8192 SYS.PARTICRESPONSES
16393 8192 SYS.PARTICRESPONSES
24585 8192 SYS.PARTICRESPONSES
32777 8192 SYS.PARTICRESPONSES
40969 23032 Free
34 9 8192 SYS.PARTICRESPONSES
8201 8192 SYS.PARTICRESPONSES
16393 8192 SYS.PARTICRESPONSES
24585 8192 SYS.PARTICRESPONSES
32777 8192 SYS.PARTICRESPONSES
40969 8192 SYS.PARTICRESPONSES
49161 8 SYS.PEDOMETER
49169 16 Free
49185 8 SYS.PEDOMETER_STEP
49193 14808 Free
23 rows selected.
SQL> select status, NAME,owner# from obj$ where name in ('PEDOMETER_STEP','PEDOMETER','PARTICRESPONSES');
STATUS NAME OWNER#
1 PARTICRESPONSES 13850
1 PEDOMETER 13850
1 PEDOMETER_STEP 13850
select USER#, NAME from user$ where USER# = 13850;
SQL>
no rows selected
SQL> select owner,segment_name,segment_type, sum(bytes)/1000000 from sys.dba_extents where
tablespace_name = 'VHBA'
group by owner,segment_name,segment_type
order by 3 desc
OWNER SEGMENT_NAME SEGMENT_TYPE SUM(BYTES)/1000000
SYS PARTICRESPONSES TABLE 1140.85069
SYS PEDOMETER TABLE .065536
SYS PEDOMETER_STEP TABLE .065536
SQL>
select USER#, NAME from user$ where name='SYS';
USER# NAME
0 SYS
update obj$ set OWNER# = 0 where name in ('PEDOMETER_STEP','PEDOMETER','PARTICRESPONSES');
SQL>
SQL> drop table sys.PEDOMETER
2 /
Table dropped.
SQL> drop table sys.PEDOMETER_STEP
2 /
Table dropped.
SQL> drop table sys.PARTICRESPONSES
2 /
Table dropped.
column tablespace_name format a20
column "Name" format a45
break on file_id skip 1
ttitle &1
select file_id, block_id, blocks, owner||'.'||segment_name "Name" from sys.dba_extents where tablespace_name = upper('&1')
UNION
select file_id, block_id, blocks, 'Free' from sys.dba_free_space where tablespace_name = upper('&1')
order by 1,2,3
Enter value for 1: VHBA
FILE_ID BLOCK_ID BLOCKS 'FRE
26 9 8192 Free
8201 8192 Free
16393 8192 Free
24585 8192 Free
32777 8192 Free
40969 8192 Free
49161 14840 Free
33 9 8192 Free
8201 8192 Free
16393 8192 Free
24585 8192 Free
32777 8192 Free
40969 23032 Free
34 9 8192 Free
8201 8192 Free
16393 8192 Free
24585 8192 Free
32777 8192 Free
40969 8192 Free
49161 8 Free
49169 16 Free
49185 8 Free
49193 14808 Free
23 rows selected.
SQL> drop tablespace vhba including contents and datafiles;
Tablespace dropped.
SQL>
after updating update obj$ set OWNER# = 0 where name in ('PEDOMETER_STEP','PEDOMETER','PARTICRESPONSES');
if you do not succeed dropping tables , then bounce the database, it will release the lock.
Thanks everyone.
Ashok bansal