DST version

ORA-39405 with impdp when you have mixed time zone versions

Today, Gisela, a former team mate from CSS/ACS Support contacted me regarding an issue seen at a customer. She reported an ORA-39405 with impdp when you have mixed time zone versions. But how can this happen? And what are the potential workarounds? Since some of our hosted environments got into the same situation already, this may be worth a blog post and some explanation.

Why does this happen?

You never cared about DST (Daylight Savings Time) files and versions of your database? This isn’t unusual, and in many environments actually not a problem …

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Choose your desired time zone version (DST) upgrade

This morning I received a very reasonable question from a customer who has a time zone mismatch between source and target database. And he wants to transport into a PDB on Exadata. Even though, this sounds trivial at first sight, unfortunately it isn’t. But a bug fix done recently for a German automotive customer is very handy here. So let me show you how you can Choose your desired time zone version (DST) upgrade.

Choose your desired time zone version (DST) upgrade

Photo by Vince Veras on Unsplash

Where does the problem start?

In this particular – and not unusual case – the customer wants to migrate …

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