Oracle10g的新特性flashback drop

SYS AS SYSDBA on 29-MAR-05 >connect eygle/eygle
Connected.

EYGLE  on 29-MAR-05 >create table t1 as select * from dba_users;

Table created.

EYGLE  on 29-MAR-05 >drop table t1;

Table dropped.

EYGLE  on 29-MAR-05 >show recyclebin;
ORIGINAL NAME    RECYCLEBIN NAME                OBJECT TYPE  DROP TIME
---------------- ------------------------------ ---------- ----------------
T1               BIN$83T2+h92CJvgNAgAIMR+0Q==$0 TABLE    2005-03-29:21:52:00
EYGLE  on 29-MAR-05 > FLASHBACK TABLE t1 TO BEFORE DROP;

Flashback complete.
EYGLE  on 29-MAR-05 >desc t1
 Name                                      Null?    Type
 --------------------------------  ----------------------------
 USERNAME                                  NOT NULL VARCHAR2(30)
 USER_ID                                   NOT NULL NUMBER
 PASSWORD                                           VARCHAR2(30)
 ACCOUNT_STATUS                            NOT NULL VARCHAR2(32)
 LOCK_DATE                                          DATE
 EXPIRY_DATE                                        DATE
 DEFAULT_TABLESPACE                        NOT NULL VARCHAR2(30)
 TEMPORARY_TABLESPACE                      NOT NULL VARCHAR2(30)
 CREATED                                   NOT NULL DATE
 PROFILE                                   NOT NULL VARCHAR2(30)
 INITIAL_RSRC_CONSUMER_GROUP                        VARCHAR2(30)
 EXTERNAL_NAME                                      VARCHAR2(4000)

EYGLE  on 29-MAR-05 >show recyclebin;

EYGLE  on 29-MAR-05 >show recyclebin;
ORIGINAL NAME  RECYCLEBIN NAME                OBJECT TYPE  DROP TIME
-------------- ---------------------------- ------------ ---------------
T             BIN$29ycNBfhan/gNAgAIMR+0Q==$0 TABLE     2004-06-02:15:26:35
EYGLE  on 29-MAR-05 >purge table t;

Table purged.

EYGLE  on 29-MAR-05 >show recyclebin;