Database UTF-8 encoding problem when trying to retrieve data from spring boot application

My Oracle Database does not support utf-8 encoding, however some tables column values still consists of utf-8 characters. it is inserted using N text literal. So my goal is to be able to filter this utf-8 characters from spring boot application. Currently when I try to filter data utf-8 characters are read as '?' question marks in database. my initial thought to fix was to achieve following oracle query in my Spring boot applicationSELECT * FROM entity WHERE text like N'%utf-8-characters%' (this query works correctly on database)

I was unable to find hql code for replacing N string literal

  @Query("SELECT e FROM Entity e WHERE " +"(:filter is null or :filter = '' or "+"LOWER(e.text) LIKE CONCAT('%',LOWER(:filter), '%')  "+"ORDER BY e.modifiedDate DESC")  Page<Entity> findAllByOrderByModifiedDateDesc(@Nullable String filter, Pageable pageable);

I also tried native query, it worked if I hardcode filter for example, but could not pair with incoming argument.works but hardcoded -> WHERE text LIKE N'%აა%'invalid -> WHERE text LIKE N:filter

@Query(value = "SELECT * FROM entity WHERE text LIKE CONCAT('%',CONCAT(:filter,'%')) ORDER BY modified_date",nativeQuery = true)Page<Entity> findAllByOrderByModifiedDateDesc(@Nullable String filter, Pageable pageable);

adding encoding properties wont work because as I said database itself does not reads utf-8 characters

spring.datasource.url=jdbc:oracle:thin:@111.11.1.111:1111:DB?useUnicode=true&characterEncoding=UTF-8server.servlet.encoding.charset=UTF-8server.servlet.encoding.enabled=trueserver.servlet.encoding.force=true

neither does beans like CharacterEncodingFilter.