Spring Data JPA native query result binding - spring

Question

Entity class:
#Entity
#SqlResultSetMapping(
name="hourMapping",
classes=#ConstructorResult(
targetClass=Representation.class,
columns={
#ColumnResult(name="hour", type=BigDecimal.class),
#ColumnResult(name="transactions", type=BigDecimal.class)
}
)
)
#NamedNativeQuery(name="MyEntity.reportByHour", query="SELECT hour,SUM(tran_per_hour) AS transactions FROM MY_ENTITY GROUP BY hour ORDER BY hour"
,resultSetMapping="hourMapping")
#Table(name="MY_ENTITY")
public class MyEntity implements Serializable {
Pojo class:
#Data //Lombok
#JsonAutoDetect(fieldVisibility = Visibility.ANY)
public class Representation {
public Representation(BigDecimal hour, BigDecimal transactions) {
this.hour = hour;
this.transactions = transactions;
}
private BigDecimal hour;
private BigDecimal transactions;
Repository interface:
public interface MyEntityRepository extends JpaRepository<MyEntity, MyEntityPK> {
List<Representation> reportByHour();
}
When I run the endpoint which invokes the native query, I get exception:
Failed to convert from type [java.lang.Object[]] to type [com.representation.Representation] for value '{0, 198}'; nested exception is org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [java.math.BigDecimal] to type [com.representation.Representation]
Now if I just have "hour" field returned from my native query (and relevant changes to POJO constructor etc) it works fine.
Any help appreciated.

Answer 1

Ok, false alarm. My hibernate dependencies were all messed up and causing conflicts so resulting in the above exception.
After fixing these dependency issues, works great!!
Long story short: let spring-boot-* handle most hibernate dependencies instead of overriding or managing your own.