Database Install/Upgrade/Opatch (MOSC)

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Adventures in upgrading (downgrading).

edited Feb 25, 2020 4:11AM in Database Install/Upgrade/Opatch (MOSC) 7 commentsAnswered

In my usual OCD fashion, reading the manual leaves me with several questions. 

Having completed a test environment upgrade from 12.1.0.2 EE to 18.0 EE, I’m now looking at rehearsing a downgrade.   Below is from E88788-10, August 2019, section “Downgrading a CDB or Non-CDB Oracle Database”, beginning on page 6-9 of the pdf.

1. Log in to the system as the owner of the Oracle Database Oracle home directory.

2. At a system prompt, change to the directory ORACLE_HOME/rdbms/admin, where

ORACLE_HOME is the Oracle home on your system.

It is completely unclear if they are referring to the ORACLE_HOME the db is currently running from (18.0), or the one it will run from after downgrading (12.1.0.2)

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