Oracle | Restore Points and Guaranteed Restore Points

Oracle Restore Points Version 26ai

General Information

Library Note

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Oracle Database 26ai will be available on generic Linux platforms in January and soon on AIX and Windows

Purpose Restore points are used with Flashback Database to create points-in-time to which the database can be flashed back at a later time if desired.

Related Data Dictionary Objects

GV_$PARAMETER

GV$RESTORE_POINT

V_$DATABASE

Related Privileges

FLASHBACK ANY TABLE

SELECT ANY DICTIONARY

SELECT CATALOG ROLE

Security Model To create a normal restore point, you must have either SELECT ANY DICTIONARY or FLASHBACK ANY TABLE privilege. To create a guaranteed restore point, you must have the SYSDBA system privileges. To view or use a restore point, you must have the SELECT ANY DICTIONARY or FLASHBACK ANY TABLE system privilege or the SELECT_CATALOG_ROLE role.

Normal Restore Point

Create regular restore point CREATE [CLEAN] RESTORE POINT <restore_point_name> [FOR PLUGGABLE DATABASE <pdb_name>] [AS OF <TIMESTAMP <timestamp_value> | SCN <scn_value>] [<PRESERVE | GUARANTEE FLASHBACK DATABASE>];

conn sys@pdbdev as sysdba

      

      set linesize 121

      col name format a30

      col value format a30

      

      SELECT name, value

      FROM gv_$parameter

      WHERE name LIKE '%flashback%';

      

      SHUTDOWN IMMEDIATE;

      

      STARTUP MOUNT EXCLUSIVE;

      

      ALTER DATABASE ARCHIVELOG;

      

      ALTER DATABASE FLASHBACK ON;

      

      ALTER DATABASE OPEN;

      

      SELECT flashback_on, log_mode

      FROM v_$database;

      

      -- normal restore point

      CREATE RESTORE POINT  before_damage;

      

      set linesize 121

      col name format a15

      col time format a32

      

      SELECT name, scn, time, database_incarnation#, guarantee_flashback_database, storage_size

      FROM gv_$restore_point

      ORDER BY 2;

      

      -- do some serious damage

      conn uwclass/uwclass@pdbdev

      

      TRUNCATE TABLE airplanes;

      DROP TABLE servers;

      

      -- log back in as SYS and repair the DB

      conn sys@pdbdev as sysdba

      

      SHUTDOWN IMMEDIATE;

      

      STARTUP MOUNT;

      

      flashback database to restore point before_damage;

      

      ALTER DATABASE OPEN RESETLOGS;

      

      conn uwclass/uwclass@pdbdev

      

      desc airplanes

      

      SELECT COUNT(*) FROM airplanes;

      

      desc servers

      

      SELECT COUNT(*) FROM servers;

      

      CREATE RESTORE POINT del_rec;

      

      SELECT name, scn, time, database_incarnation#, guarantee_flashback_database, storage_size

      FROM gv_$restore_point

      ORDER BY 2;

      

      ALTER TABLE servers ENABLE ROW MOVEMENT;

      

      DELETE FROM servers WHERE rownum < 101;

      

      COMMIT;

      

      FLASHBACK TABLE servers TO RESTORE POINT del_rec;

      

      SELECT COUNT(*) FROM servers;

Guaranteed Restore Point

Create a guaranteed restore point CREATE RESTORE POINT <restore_point_name> [AS OF <TIMESTAMP | SCN> <timestamp_or_scn_value>] GUARANTEE FLASHBACK DATABASE;

-- This demo assumes previous setup so database is already in archivelog mode with flashback on



      

      CREATE RESTORE POINT before_damage GUARANTEE FLASHBACK DATABASE;

      

      set linesize 121

      col scn format 99999999

      col time format a32

      

      SELECT scn, database_incarnation#, guarantee_flashback_database, storage_size, time, name

      FROM gv_$restore_point

      ORDER BY 1;

Drop Restore Point

Drop an existing regular or guaranteed restore point DROP RESTORE POINT <restore_point_name>;

CREATE RESTORE POINT before_damage;

      

      DROP RESTORE POINT BEFORE_DAMAGE;

      

      DROP RESTORE POINT del_rec;

      

      SELECT scn, database_incarnation#, guarantee_flashback_database, storage_size, time, name

      FROM gv_$restore_point

      ORDER BY 1;