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Oracle10g Grid Computing with RAC
Chapter 17 -
Oracle’s Grid Integration Technologies

New Parameters for Data Pump Import

The following are descriptions of some of the new commands in Data Pump import:

flashback_scn  – This specifies the system change number (SCN) that import uses to enable the Flashback utility. The import operation is performed with data that is consistent as of this SCN. This parameter is only relevant when importing through a database link.

flashback_time – This will use a SCN that is most closely matched to the specified time to enable the Flashback utility.  The import operation is performed with data that is consistent as of this SCN. This parameter is only relevant when importing through a database link.

query  – This allows you to filter the data that is imported by applying a query to SELECT statements executed on the source system.

network_link – This specifies a database link to the source database and enables import’s network mode.  This parameter is required if any of the following parameters are specified:

  • flashback_scn

  • flashback_time

  • estimate

  • transport_tablespace

  • query

remap_datafile – This changes the name of the source datafile to the target datafile name in all DDL statements in which the source datafile is referenced.  This is useful when you perform database migration to another system with different file naming conventions.

remap_schema  – This replaces the FROMUSER and TOUSER parameters in the original import utility, and loads all objects from the source schema into the destination schema (the default for this parameter is NONE).

remap_tablespace– It re-maps all objects selected for import with persistent data in the source tablespace to be created in the destination tablespace on the target system.  This is very useful when you want to change the default tablespace for a user.

For more information, see the book Oracle 11g Grid and Real Application Clusters 30% off if you buy it directly from Rampant TechPress . 

Written by top Oracle experts, this RAC book has a complete online code depot with ready to use RAC scripts.

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