How to do a like case-insensitive and accent insensitive in Oracle 10gR2 and JPA?

Question

In a J2EE project, using JPA, how can I force a like query to be case insensitive and accent insensitive?

I know about changing session variables NLS_COMP and NLS_SO

Answer 1

You could use NLS_UPPER for that without altering the session:

select 1
from dual
where nls_upper('große', 'NLS_SORT = XGerman') like '%OSSE%';

NLS_UPPER documentation