【MOS】Why an Object Not Be Exported? ORA-39166 or ORA-31655 (文件 ID 2114233.1)

In this Document

Goal

Solution

References

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APPLIES TO:

Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Oracle Database - Standard Edition - Version 12.1.0.2 and later
Information in this document applies to any platform.

GOAL

This document explains why certain objects cannot be exported, and how to find those objects.

There are certain system generated schemas that are not exportable using exp or expdp because they contain Oracle-managed data and metadata. SYS, MDSYS, and ORDSYS are some examples.

In addition, there are other tables owned by users such as SYS or APEX_040200 which are automatically skipped during export, nor can those be exported intentionally. 

For example, certain tables owned by SYSTEM user like below cannot be exported:

 

SOLUTION

Objects (tables, views, schemas, etc) which fall under either of below conditions are not exported with expdp because they are regarded as system maintained objects.

• Object is listed in ku_noexp_view. 
  This view is a union of ku_noexp_tab and noexp$ tables. 
  Objects that are listed in this view are not exported.
  
  
• Object is ORACLE_MAINTAINED='Y' in ALL_OBJECTS (and DBA_OBJECTS).

 

REFERENCES

NOTE:1912162.1 - 12.1.0.1 EXPDP Does Not Export APEX Schema
BUG:17373592 - EXPDP DOES NOT EXPORT APPLICATION EXPRESS OBJECTS CORRECTLY

About Me

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