PSQLException: The column name clazz_ was not found in this ResultSet - postgresql

Question

I am trying to fetch a PlaceEntity. I've previously stored a bunch of GooglePlaceEntity objects where
#Entity
#Table(name = "place")
#Inheritance(
strategy = InheritanceType.JOINED
)
public class PlaceEntity extends AbstractTimestampEntity {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
}
and
#Entity
#Table(name = "google_place")
public class GooglePlaceEntity extends PlaceEntity {
// Additional fields ..
}
However, neither do I want to send information stored in google_place nor do I want to load it unnecessarily. For this reason I am only fetching
public interface PlaceRepository extends JpaRepository<PlaceEntity, Long> {
#Query(value = "" +
"SELECT * " +
"FROM place " +
"WHERE earth_distance( " +
" ll_to_earth(place.latitude, place.longitude), " +
" ll_to_earth(:latitude, :longitude) " +
") < :radius",
nativeQuery = true)
List<PlaceEntity> findNearby(#Param("latitude") Float latitude,
#Param("longitude") Float longitude,
#Param("radius") Integer radius);
}
and what I get is this:
org.postgresql.util.PSQLException: The column name clazz_ was not found in this ResultSet.
at org.postgresql.jdbc.PgResultSet.findColumn(PgResultSet.java:2588) ~[postgresql-9.4.1208-jdbc42-atlassian-hosted.jar:9.4.1208]
at org.postgresql.jdbc.PgResultSet.getInt(PgResultSet.java:2481) ~[postgresql-9.4.1208-jdbc42-atlassian-hosted.jar:9.4.1208]
at com.zaxxer.hikari.pool.HikariProxyResultSet.getInt(HikariProxyResultSet.java) ~[HikariCP-2.7.8.jar:na]
at org.hibernate.type.descriptor.sql.IntegerTypeDescriptor$2.doExtract(IntegerTypeDescriptor.java:62) ~[hibernate-core-5.2.14.Final.jar:5.2.14.Final]
at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:47) ~[hibernate-core-5.2.14.Final.jar:5.2.14.Final]
...
I am able to run this statement in pure PostgreSQL:
SELECT * FROM place WHERE
earth_distance(
ll_to_earth(place.latitude, place.longitude),
ll_to_earth(17.2592522, 25.0632745)
) < 1500;
but not using the JpaRepository.
And by the way, fetching a GooglePlaceEntity is working however:
#Query(value = "" +
"SELECT * " +
"FROM place JOIN google_place ON google_place.id = place.id " +
"WHERE earth_distance( " +
" ll_to_earth(place.latitude, place.longitude), " +
" ll_to_earth(:latitude, :longitude) " +
") < :radius",
nativeQuery = true)
List<GooglePlaceEntity> findNearby(#Param("latitude") Float latitude,
#Param("longitude") Float longitude,
#Param("radius") Integer radius);

Answer 1

In case of #Inheritance(strategy = InheritanceType.JOINED), when you retrieve data without nativeQuery=True in JPA repository, Hibernate will execute SQL like the following:
SELECT
table0_.id as id1_1_,
table0_.column2 as column2_2_1_,
... (main_table cols)
table0_1_.column1 as column1_1_0_,
... (table1 to N-1 cols)
table0_N_.column1 as column1_1_9_,
... (tableN-th cols)
CASE WHEN table0_1_.id is not null then 1
... (table1 to N-1 cols)
WHEN table0_N_.id is not null then N
WHEN table0_.id is not null then 0
END as clazz_
FROM table table0_
left outer join table1 table0_1_ on table0_.id=table0_1_.id
... (other tables join)
left outer join table2 table0_N_ on table0_.id=table0_N_.id
From the above SQL you can see clazz specification. If you want to map ResultSet to your super instance (PlaceEntity), you should specify clazz_ column in SELECT by yourself.
In your case it will be:
#Query(value = "" +
"SELECT *, 0 AS clazz_ " +
"FROM place " +
"WHERE earth_distance( " +
" ll_to_earth(place.latitude, place.longitude), " +
" ll_to_earth(:latitude, :longitude) " +
") < :radius",
nativeQuery = true)

Answer 2

You should use the name of the class instead of the table name on the query. Change place to PlaceEntity.
#Query(value = "" +
"SELECT * " +
"FROM place JOIN google_place ON google_place.id = place.id " +
"WHERE earth_distance( " +
" ll_to_earth(place.latitude, place.longitude), " +
" ll_to_earth(:latitude, :longitude) " +
") < :radius",
nativeQuery = true)
List<GooglePlaceEntity> findNearby(#Param("latitude") Float latitude,
#Param("longitude") Float longitude,
#Param("radius") Integer radius);