As I learned from a customer this week, this patch is a must have when you use Partitioning and you attempt to upgrade to Oracle 19.9.0 or earlier. So please apply patch 31088341 before Upgrade to prevent ORA-1403 happening.
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What is the issue?
This applies to all 19c upgrades at least until 19.9.0.
The fix is included from 19.10.0 Release Update onward. So if you are upgrading to 19.10.0 or higher, you can stop reading here (thanks Pablo for the hint!).
You may see this error pattern in catupgrd0.log:
==Error from catupgrd0.log=== =================================================================… Continue reading...
