ORA-39346: data loss in character set conversion for object SCHEMA_EXPORT/TABLE/COMMENT

In Unicode AL32UTF8, special characters, invalid characters might cause errors like “ORA-39346: data loss in character set conversion”.

When importing a schema exported from one 12cR1 AL32UTF8 database to another database  with same AL32UTF8 characterset, this ORA -error was generated :

ORA-39346: data loss in character set conversion for object SCHEMA_EXPORT/TABLE/COMMENT

The error message clearly shows the problem data is from “SCHEMA_EXPORT/TABLE/COMMENT”.

Using MDU tool ( Database  Migration Assistant for Unicode ) to scan database Dictionary Objects, we can see the problem data is from SYS.COM$.

Subscribe to get access

Read more of this content when you subscribe today.

Using MDU tool ( Database  Migration Assistant for Unicode ) to scan database Dictionary Objects again, we can see all green including SYS.COM$.

Do another export and import again, everything works fine.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.