在Oracle 10gR2中设定指定的恢复点实现轻松闪回

SQL> CONNECT / AS SYSDBA

Connected.

SQL> GRANT SELECT ANY DICTIONARY TO oe; 
Grant succeeded.
SQL> CONNECT OE/OE

Connected.
SQL> -- Tables must have row movement enabled to flash back

SQL> ALTER TABLE warehouses 2 ENABLE ROW MOVEMENT;
Table altered.
SQL> CREATE RESTORE POINT my_update;
Restore point created.
SQL> COLUMN name FORMAT a25

SQL> COLUMN time FORMAT a32

SQL> 
SQL> SELECT name, scn, time, 
guarantee_flashback_database 2 FROMv$restore_point;
NAME SCN TIME GUA 

------------------------- ---------- ------------------------------ 

MY_UPDATE 734934 10-AUG-06 03.32.29.000000000 PM NO 
SQL> UPDATE warehouses 2 SET warehouse_name = 'Bellevue, WA';
9 rows updated.
SQL> COMMIT;
Commit complete.
SQL> SELECT warehouse_id, warehouse_name 2 FROM warehouses;
WAREHOUSE_ID WAREHOUSE_NAME 

------------ ----------------------------------- 
1 Bellevue, WA 2 Bellevue, WA 3 Bellevue, WA 4 Bellevue, 
WA 5 Bellevue, WA 6 Bellevue, WA 7 Bellevue, WA 8 Bellevue,
WA 9 Bellevue, WA 9 rows selected.SQL> CONNECT / AS SYSDBA Connected.

SQL> GRANT SELECT ANY DICTIONARY TO oe;
Grant succeeded.
SQL> CONNECT OE/OE

Connected.
SQL> -- Tables must have row movement enabled to flash back

SQL> ALTER TABLE warehouses 2 ENABLE ROW MOVEMENT;
Table altered.
SQL> CREATE RESTORE POINT my_update;
Restore point created.
SQL> COLUMN name FORMAT a25

SQL> COLUMN time FORMAT a32

SQL> 
SQL> SELECT name, scn, time, 
guarantee_flashback_database 2 FROMv$restore_point;
NAME SCN TIME GUA 

------------------------- ---------- ------------------------------- 

MY_UPDATE 734934 10-AUG-06 03.32.29.000000000 PM NO 
SQL> UPDATE warehouses 2 SET warehouse_name = 'Bellevue, WA';
9 rows updated.
SQL> COMMIT;
Commit complete.
SQL> SELECT warehouse_id, warehouse_name 2 FROM warehouses;
WAREHOUSE_ID WAREHOUSE_NAME 

------------ -----------------------------------
1 Bellevue, WA 2 Bellevue, WA 3 Bellevue, 
WA 4 Bellevue, WA 5 Bellevue, WA 6 Bellevue, WA 7 Bellevue,
WA 8 Bellevue, WA 9 Bellevue, WA 9 rows selected.
SQL> FLASHBACK TABLE warehouses 2 TO RESTORE POINT my_update;
Flashback complete.
SQL> SELECT warehouse_id, warehouse_name 2 FROM warehouses;
WAREHOUSE_ID WAREHOUSE_NAME 

------------ ----------------------------------- 
1 Southlake, Texas 2 San Francisco 3 New Jersey 4 Seattle, 
Washington 5 Toronto 6 Sydney 7 Mexico City 8 Beijing 9 Bombay 
9 rows selected.


SQL> FLASHBACK TABLE warehouses 2 TO RESTORE POINT my_update;
Flashback complete.
SQL> SELECT warehouse_id, warehouse_name 2 FROM warehouses;
WAREHOUSE_ID WAREHOUSE_NAME 

------------ ----------------------------------- 
1 Southlake, Texas 2 San Francisco 3 New Jersey 4 Seattle, 
Washington 5 Toronto 6 Sydney 7 Mexico City 8 Beijing 9 Bombay 
9 rows selected.