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Oracle® Database Backup and Recovery Reference
10g Release 2 (10.2)

Part Number B14194-02
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untilClause

Syntax

untilClause::=

Description of untilclause.gif follows
Description of the illustration untilclause.gif

Purpose

A subclause that specifies an upper limit by time, SCN, restore point or log sequence number for various RMAN operations.


See Also:

Oracle Database Backup and Recovery Basics to learn how to set the date format used by RMAN

Restrictions and Usage Notes

Keywords and Parameters

Syntax Element Description
UNTIL SCN = integer Specifies an SCN as an upper limit. RMAN selects only files that can be used to restore or recover up to but not including the specified SCN. For example, RESTORE DATABASE UNTIL SCN 1000 chooses only backups that could be used to recover to SCN 1000.
UNTIL RESTORE POINT restore_point_name Specifies a restore point, so that the SCN at which the restore point was created is the upper limit. RMAN selects only files that can be used to restore or recover up to but not including the corresponding SCN.

Note: The database must be mounted when using SET UNTIL RESTORE POINT.

UNTIL SEQUENCE = integer THREAD = integer Specifies a redo log sequence number and thread as an upper limit. RMAN selects only files that can be used to restore or recover up to but not including the specified sequence number. For example, REPORT OBSOLETE UNTIL SEQUENCE 8000 THREAD 1 reports only backups that could be used to recover through log sequence 7999.
UNTIL TIME = 'date_string' Specifies a time as an upper limit. RMAN selects only files that can be used to restore and recover up to but not including the specified time. For example, LIST BACKUP UNTIL TIME 'SYSDATE-7' lists all backups that could be used to recover to a point one week ago.

Examples

Performing Incomplete Recovery Until a Log Sequence Number: Example This example assumes that log sequence 1234 was lost due to a disk failure and the database needs to be recovered by using available archived redo logs.

RUN
{
SET UNTIL SEQUENCE 1234 THREAD 1;
  RESTORE CONTROLFILE ;
  ALTER DATABASE MOUNT;
  RESTORE DATABASE;
  RECOVER DATABASE;  # recovers through log 1233
  ALTER DATABASE OPEN RESETLOGS;
}

Performing Incomplete Recovery to a Specified SCN: Example This example (which assumes a mounted database) recovers the database until a specified SCN:

RUN
{
  ALLOCATE CHANNEL ch1 TYPE sbt;
  RESTORE DATABASE;
  RECOVER DATABASE UNTIL SCN 1000;  # recovers through SCN 999
  ALTER DATABASE OPEN RESETLOGS;
}

Performing Incomplete Recovery to a Restore Point: Example This example (which assumes that the database starts out not mounted) recovers the database until a specified restore point:

STARTUP MOUNT;
RUN
{
  SET UNTIL RESTORE POINT 'before_batch';
  RESTORE DATABASE;
  RECOVER DATABASE;
  ALTER DATABASE OPEN RESETLOGS;
}

Reporting Obsolete Backups: Example This example assumes that you want to be able to recover to any point within the last week. It considers as obsolete all backups that could be used to recover the database to a point one week ago:

REPORT OBSOLETE UNTIL TIME 'SYSDATE-7';