Time is part of your problem. If your varchar columns are
defined in bytes, then your data may be too big to move. Certain characters
go from single byte to multi byte thus expanding the size of your data. That
has killed several conversions in my career. The amount of work was too much.
Liz
Elizabeth Reen
CPB Database Group Manager
From: [External] oracle-l-bounce@xxxxxxxxxxxxx <oracle-l-bounce@xxxxxxxxxxxxx>
On Behalf Of [External] Upendra nerilla
Sent: Wednesday, January 16, 2019 3:12 PM
To: Oracle-L <oracle-l@xxxxxxxxxxxxx>
Subject: Characterset change
Hello Oracle Experts -
Environment: Redhat 6.7, EE 12.1
DB size: 4TB
We have been looking into switching the Characterset of a DB from
"WE8ISO8859P15" to "AL16UTF8".
This is a standalone Enterprise Edition database (non-RAC, No Data Guard).
We have looked at DB Migration Assistant and DataPump as possible options. Both
involves quite a bit of downtime,
wondering if there is a better way to perform this activity? Would
Transportable tablespace be an option?
Thanks much in advance
-Upendra
