timezone

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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Zero Downtime Upgrade of Timezone Data in Oracle 21c and 23c?

There is a feature in Oracle Database 21c I planned to write about for a very long time: Zero Downtime Upgrade of Timezone Data in Oracle 21c and 23c. This sounds very promising – but let us take a closer look together in this blog post.

Time Zone Upgrade?

There is of course an ongoing discussion whether and when you should upgrade the DST version of your database to a current value. Since we all live in a more and more globalized world, this topic becomes more and more important. Even more important …

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