You may have read my previous blog post about Upgrading a non-CDB to Oracle Database 21c. And I referred to a potential Pitfall: Upgrade to 21c fails when ORDIM is present but no SDO. In this blog post I would like to explain how to avoid this pitfall beforehand and explain what needs to be done.

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What’s the problem?
In my previous blog post I showed you the ideal and normal way. But during my tests I came across an issue I was not aware of – and I simply had no …
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