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using the remap_table import option

Oracle Tips by Burleson Consulting
August 14, 2008

 

Question: I want to rename my tables from an existing data pump .dmp file. I noted the new data pump import (impdp) option called remap_table. Can remap_table be used to re-name a set of tables on import?
 
Answer: The remap_table parameter allows you to rename a table within a schema, and the remap_table syntax is very simple. Here, we rename the employees table to the emps table:
 
impdp scott/tiger tables=(emp) remap_table=employees:emps
 
According to the docs, you must use the Oracle “network_link” parameter and the “transportable” parameter to use remap_table parameter.
 
  • network_link – This specifies a database link to the source database and enables import’s network mode. 
 
  • transportable – when set to “always” it Instructs the import job to use the transportable option. If transportable is not possible, the job will fail.
 
Also note these renaming features in data pump imports:
  • 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.


 

 

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