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Oracle® Database Backup and Recovery Reference
12c Release 1 (12.1)

E17631-15
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foreignFileSpec

Purpose

Use the foreignFileSpec subclause to provide the information required to perform a cross-platform restore operation. This information includes the name of the backup set that contains the cross-platform backup and details of objects or files that must be restored.

Usage Notes

Specifying a foreignFileSpec is mandatory to perform a cross-platform restore operation. You can restore tablespaces even if the source platform and the destination platform use different endian formats.

Semantics

Syntax Element Description
ALL FOREIGN DATAFILES Specifies that all the data files contained in the cross-platform backup set must be restored. Use FROM BACKUPSET along with ALL FOREIGN DATAFILES to specify the name of the backup set that contains the data files to be restored.
FORMAT formatSpec Specifies a pattern for the restored data files in the destination database.
TO NEW Specifies that the data files must be restored to the location specified by the DB_FILE_CREATE_DEST initialization parameter using Oracle Managed File (OMF) names.
DUMP FILE 'filename' Specifies that the backup set containing the Data Pump export dump file must be restored. The name of the backup set containing the dump file is specified using the FROM BACKUPSET clause. The dump file contains the metadata of the tablespaces that are being transported across platforms. You need this metadata to plug the restored tablespaces into the destination database.

filename represents the name of the file into which the export dump file is restored.

DATAPUMP DESTINATION 'datapump_destination' Specifies the location to which the export dump file must be restored. If you omit this clause, the export dump file is restored to an operating system-dependent default location.

The database must be opened in read-write mode when this clause is used, otherwise an error occurs.

NOIMPORT Specifies that the export dump file must be restored, but not imported into the destination database.

Because the export dump file is not imported, the tablespaces are not plugged in to the destination database. You need to manually import the dump file into the destination database using the Data Pump Import to plug the tablespaces.

FOREIGN DATABASE Specifies that the entire database must be restored from a cross-platform backup set. Use FROM BACKUPSET to specify the backup set that contains the cross-platform database backup.

When FOREIGN DATABASE is used, the database must not be mounted, else an error occurs.

FOREIGN DATAFILE integer Restores the specified data files that are contained in a cross-platform backup. You can choose to restore only some of the data files contained in the cross-platform backup set. Use FROM BACKUPSET to specify the name of the backup set that contains the cross-platform backup.

integer specifies the absolute number of the data file in the source database.

FOREIGN TABLESPACE tablespace_name Specifies the tablespaces that must be restored from the cross-platform backup set. The names of the tablespaces must be the original tablespaces names in the source database. Use FROM BACKUPSET to specify the name of the backup set that contains the cross-platform backup.
BACKUPSET filename Specifies the backup set that contains the cross-platform backup that must be restored.

Most backup sets contain only one backup piece. However, you can create a backup consisting of multiple backup pieces by configuring MAXPIECESIZE to specify the maximum size of each backup piece. When a backup set contains multiple backup pieces, the FROM BACKUPSET clause must include a comma-separated list of all the backup pieces in the backup set. The order of the backup pieces must be must be from the first piece to the last piece. If this order is not followed, the restore operation fails. See Example 3-34 for a RESTORE command that contains multiple backup pieces.

If a cross-platform backup consists of multiple backup sets, then you must use a separate BACKUPSET clause for each backup set that was created as part of the cross-platform backup. See Example 3-34 for a RESTORE command that contains multiple backup pieces.


Examples

Example 4-20 Restoring all Data files from a Cross-Platform Backup

In the following example, the backup set Oelmdipc_1_1 was created in the source database for cross-platform tablespace transport. The RESTORE command, with foreignFileSpec, is used to restore all data files contained in this cross-platform backup in the destination database. The destination database must be open in read-write mode.

RESTORE
    ALL FOREIGN DATAFILES TO NEW
    FROM BACKUPSET '/net/oracle/restores/Oelmdipc_1_1';

See Also:

"RESTORE" for additional examples on restoring cross-platform backups