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Database downgrade from 12.2.0.1 to earlier release fails with error:"ORA-20000: All SQL patches must be rolled back before downgrade" (Doc ID 2396071.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 12.2.0.1 to 12.2.0.1 [Release 12.2]
Information in this document applies to any platform.

Symptoms

When attempting to downgrade database from 12.2.0.1 to 11.2.0.4 it failed with below error



Changes

 

Cause

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