Drop

Database Migration from non-CDB to PDB – Plug in, upgrade, convert

Posted on July 24, 2019 by Mike.Dietrich Single-/Multitenant 2

This is my next blog post about Database Migration from non-CDB to PDB – Plug in, upgrade, convert. But what is different from the previous one? And why is it necessary? Since Oracle Database 12.2.0.1 you can plugin a non-CDB at first, the upgrade and convert it. And I’ll show you this technique here.

Photo by Dan Freeman on Unsplash

High Level Overview

Endianness change possible:	No
Source database versions:	Oracle 12.2.0.1 or newer (or 12.1.0.2 when CDB has shared UNDO or with a patch adding the UNDO commands to DBMS_PDB.DESCRIBE in 12.1.0.2)
Characteristic:	Plugin into CDB first
Upgrade

DROP PLUGGABLE DATABASE – things you need to know

Directly after my DOAG (German Oracle User Group) Conference presentation about “How Single-/Multitenant will change a DBA’s life” Martin Bach (Enkitec) approached me and told me about his experiences with the DROP PLUGGABLE DATABASE command and future recoverability.

Martin discovered that once you issued the DROP PLUGGABLE DATABASE command you can’t reuse a previously taken backup of this particular PDB anymore and recover the PDB into this existing CDB. I wasn’t aware of this and I’m glad that Martin told me about it.