alter table move into temporary tablespace.

I'm trying to shrink a datafile, which has plenty of free space:

SQL> alter database datafile '/u02/oradata/s_amp.dbf' resize 1000M; alter database datafile '/u02/oradata/s_amp.dbf' resize 1000M
*

ERROR at line 1:
ORA-03297: file contains used data beyond requested RESIZE value

This tablespace only has a few tables, so I:

alter tablespace temp permanent;

alter table x move tablespace temp (for all tables) alter table x move tablespace s_amp (for all tables) rebuild indexes

Now, not only has the ORA-03297 not gone away, but I can no longer alter TEMP to be a temporary tablespace:

SQL> alter tablespace temp temporary;
alter tablespace temp temporary
*

ERROR at line 1:
ORA-01662: tablespace 'TEMP' is non-empty and cannot be made temporary

How can I correct this?

SQL> select * from dba_segments where tablespace_name='TEMP';

OWNER                          SEGMENT_NAME
------------------------------ 
---------------------------------------------------------------------------------
PARTITION_NAME                 SEGMENT_TYPE       TABLESPACE_NAME                
HEADER_FILE HEADER_BLOCK      BYTES        BLOCKS
------------------------------ ------------------ 
------------------------------ ----------- ------------ ---------- 

   EXTENTS INITIAL_EXTENT NEXT_EXTENT MIN_EXTENTS MAX_EXTENTS PCT_INCREASE FREELISTS FREELIST_GROUPS RELATIVE_FNO BUFFER_ ---------- -------------- ----------- ----------- ----------- ------------ ---------- --------------- ------------ -------

SYS                            14.1042
                               TEMPORARY          TEMP                                    
14         1042  494141440         30160
       464        1064960     1064960           1  2147483645            0          
1               1              14 DEFAULT


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