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DataPump Import (IMPDP) Throws Errors ORA-31693 ORA-936 On An Existing Table (Doc ID 405206.1)

Last updated on JANUARY 30, 2022

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 10.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.


You try to import using DataPump Utility impdp and the job throws the following errors on already existing tables in the target database:

ORA-31693: Table data object "<OWNER>"."<TABLE NAME>" failed to load/unload and is being skipped due to error:
ORA-00936: missing expression

The Import Data Pump job will fail if:

1. The table has a LONG column (i.e.: the EXTERNAL TABLE access method cannot be used)


2. The table has a unique index and import Data Pump is done with:

(or APPEND, if the table was truncated manually before the import Data Pump started). This means that DIRECT PATH access method cannot be used either.


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