Oracle export & import into earlier release
Oracle Database Tips by Donald BurlesonJanuary 20, 2015
Question: I need to export data from 10g and
import it into 8i and 9i? How can I export from a later release and import
it into an earlier release of Oracle?
Answer: While there is never a guarantee that an
later release expdp dmp file will import into an earlier release of Oracle (this
is called ?forward compatibility?, impossible because Oracle can never know
about future enhancements) and are indeed cases where you can export from a
later release of Oracle and import into an earlier release.
There are two cases where it is possible to import into an
1 - Using the version parameter in Data Pump. See my
between different releases of Oracle with Data Pump export/import
2 - Using a exp dump file with a Data Pump impdp utility.
Using exp with impdp to import into an earlier release
In general, there was a major change
between the older export utility (exp) and the data pump export (expdp),
and Oracle notes that exports from newer releases cannot be imported into
"The version of the Import utility cannot be earlier
than the version of the Export utility used to create the dump file. "
* The Import utility and the database to which data
is being imported (the target database) must be the same version.
* The version of the Export utility must be equal to the earliest
version of the source or target database.
For example, to create an export file for an import
into a later release database, use a version of the Export utility that is
equal to the source database. Conversely, to create an export file for an
import into an earlier release database, use a version of the Export utility
that is equal to the version of the target database.
Original Export and Import do not support all Oracle Database 10g features.
. . .
However, you should still use the original Export and Import utilities in
the following situations:
* You want to import files that were created using the original Export
* You want to export files that will be imported using the original Import
utility (imp). An example of this would be if you wanted to export data from
Oracle Database 10g and then import it into an earlier database release. "
An unsupported solution to importing into an older database
It's not supported, but you might be able to use the
pre-data pump export program (exp, NOT
expdp) and use it to export data. Note that you may need to run the old
$ORACLE_HOME/rebms/admin/catexp.sql from 9i on the 10g dictionary.
Then you might be able to import:
1 - copy the executable to the Oracle_home/bin and
re-name as exp9i.exe
2 - Invoke the exp utility, pointing it to the 10g database with a
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