[ JPA ] [ mysql ] column type error Null value was assigned to a property [class .....coliumn명] of primitive type setter of ....; nested exception is org.hibernate.PropertyAccessException: Null value was assigned to a property [class ....coliumn명] of primitive type setter of .....coliumn명 db : mysql char type의 column에 null값의 data가 존재한다고 오류 발생 null 혹은 \u0000 두 경우 모두 오류 발생. type 변경 : char -> varch..