Oracle Database 11 g - Online Public Access Catalog

CHAPTER 7 ■ DATA PUMP 325SELECT dbms_random.value(100000000,999999999) into v_ssn FROM dual;return v_ssn;end;end;/You can customize functions similar to the remap_ssn function to custom-tailor sensitivetables for your corporate databases.■Tip Perform data remapping during the export operation so that the data at rest on the file system doesnot include any sensitive information. It is much easier to steal a dump file than it is to get privileges to accessthe database.Remapping a TableOracle Database 11g provides the ability to import a table into another table using the REMAP_TABLE option. The REMAP_TABLE option can be used to change the name of a specific table(partitioned and nonpartitioned) during import.Some restrictions that you may need to consider are as follows:• If partitioned tables were exported in transportable mode, then each partition andsubpartition must be promoted to its own table. The transportable mode is a newOracle Database 11g feature that specifies whether a table/partition/subpartition istransportable.• Tables will not be remapped if they already exist even if the TABLE_EXISTS_ACTION is set totruncate or append.• The export has to be performed in a nontransportable mode.The following are two examples of specifying the REMAP_TABLE parameter, one withoutpartitions and the other with partitions where exports occur in the transportable mode:impdp dumpfile=oratmp:docs.dmp \remap_table=rodba.docs.docs2 userid=rodba/oracle123impdp dumpfile=oratmp:docs.dmp \remap_table=rodba.docs:part1.docs3 userid=rodba/oracle123Notice that the REMAP_TABLE option is designated as [schema.]old_tablename[.partition]:new_tablename.