JPA Data Repositories with SqlResultSetMapping and native queries

Question

I was stuck with the following situation:

My entities are related to each other, but in such a way that i could not use JPQL. I was forced to use native SQL. Now I w

Answer 1

Add the missing resultClass

@NamedNativeQuery(name = "findAllDataMapping", resultClass = Entity.class, query="sql")

Or

@NamedNativeQuery(name = "findAllDataMapping", resultClass = MyVO.class, resultSetMapping ="findAllDataMapping" query = "sql")

and lastly call the query in your repository

@Query(nativeQuery = true, name = "findAllDataMapping")
List<MyVO> findAllOfMyVO(@Param("param1") String param1, @Param("param2") String param2);

Answer 2

You need to mark your query as a query :) And you need to use MyVO instead of MyEntity, because that is the entity you have your resulsts mapped to

@Repository
public interface MyRepository extends JpaRepository<MyVO, Long> {

    @Query(nativeQuery = true)
    List<MyVO> findAllOfMyVO(@Param("param1") String param1, @Param("param2") String param2);
}

Answer 3

You are almost there, but for the below parts

1. The whole @SqlResultSetMapping and @NamedNativeQuery has to be present in the Entity and not the value Object. In your case it should be in the MyEntity class and **not ** the MyVO class. This should resolve your exception.

2. That will still not do. After you do the above, change the below

   @NamedNativeQuery(name = "findAllDataMapping", to
   @NamedNativeQuery(name = "MyEntity.findAllDataMapping",

3. Finally, in some cases you need to be explicit in your definition of @ColumnResult(name = "userFirstName"). If it is a complex field like ZonedDateTime or Boolean you may have to explicity state @ColumnResult(name = "date_created", type = ZonedDateTime.class).

Hope that helps.