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 Export with VPD Tips

Oracle Database Tips by Donald BurlesonMarch 12, 2015

Question:  How do I export a have that has a VPD (fined grained access control policy applied against the table?

Answer:  It is the VPD policy filter that prevents the rows from being exported with exp or expdp To avoid export errors on tables with VPD, you have two choices::

   1:  Grant the exempt access policy privilege to the exporting user ID.

   2:  Temporarily disable the VPD policy.

There are two types of errors associated with exporting when you have VPD FGAC protection on a table:

- ORA-39181 :only partial table data may be exported due to fine grain access control. 

- EXP-79 "Data in table %s is protected. Conventional path may only be exporting partial table."

ORA-39181 :only partial table data may be exported due to fine grain access control.  This error appears trying to Datapump export a table with FGAC (VPD) policy enabled against it.  When expdp is run as the schema owner, if fine grained policies are discovered on tables and if the exporting user has unrestricted access, then the entire table data is exported.

Cause: This is expected behavior.  ORA-39181 is caused by an unprivileged user who tries to export a table with a fine grain access control policy applied. The table owner is subject to access control and may not be able to export all rows in the table. Only the rows that can be seen by that user are exported. In order to preserve integrity of the table, the user importing the table should have enough privilege to recreate the table with the security policies at import time.

Action: It is strongly recommended that the database administrator handles the export of this table. This as an informational message.  VPD and Oracle Label Security are not enforced during DIRECT path export and similarly, database users granted the EXEMPT ACCESS POLICY privilege, either directly or through a database role, are exempt from VPD enforcements. However, the following policy enforcement options remain in effect even when EXEMPT ACCESS POLICY is granted:

* INSERT_CONTROL, UPDATE_CONTROL, DELETE_CONTROL, WRITE_CONTROL, LABEL_UPDATE, and LABEL_DEFAULT

EXEMPT ACCESS POLICY is a strong privilege and must be granted with care. For example , grant it to the role exp_full_database role as this role is granted to admin users only.


   
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Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

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