I do have MySQL database with french special characters. When connecting with spring data application encoding works just fine, when using quarkus I can't get correct encoding. This is URL that I'm using for connection:
quarkus.datasource.jdbc.url=jdbc:mysql://localhost:4306/db?characterEncoding=UTF-8&useUnicode=yes
or
quarkus.datasource.jdbc.url=jdbc:mysql://localhost:4306/db?characterEncoding=UTF-8&useUnicode=true