NLS_LANG environment variable in /etc/default/clickhouse. For more information, see the Oracle NLS_LANG FAQ.
Example
What if I have a problem with encodings when using Oracle via ODBC?
This page provides guidance on what to do if you have a problem with encodings when using Oracle via ODBC
If you use Oracle as a source of ClickHouse external dictionaries via Oracle ODBC driver, you need to set the correct value for the