CAUTION: REMAP_SCHEMA And TABLE_EXISTS_ACTION Used With DataPump Import Can be Very Dangerous
(Doc ID 1326843.1)
Last updated on MAY 17, 2021
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.4 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
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Using REMAP_SCHEMA and TABLE_EXISTS_ACTION together during DataPump import (impdp) is extremely dangerous.
Please find the below test case to understand the issue.
Even with the correct argument in the remap_schema, the table in schema TEST_EXP2 is affected and the object of TEST_EXP1 is now exported to TEST_EXP3.
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