JPA entity has no primary key?

Question

I have an Entity class:

@Entity
@Table(name=\"CMC_MAP_SERVER_INFO\")
@NamedQuery(name=\"CmcMapServerInfo.getMapServer\", query=\"SELECT c FROM CmcMapServerIn         


        

Answer 1

Another way would be specify that the class itself can be used as unique identifier with @IdClass. So in this case just annotate the class with @IdClass(CmcMapServerInfo.class) and it should be independent of underlying database.