We are migrating from Wildfly 12 to 15. It seems that new Hibernate version "eagarly" loads lazy dependendent entity when checking its id.
@Entity
@Table(name = "HOUSE")
public class House {
private Long id;
private String name;
private Street street;
@Id
public Long getId() {return id;}
public void setId(Long id) {this.id = id;}
@Column
public String getName() {return name;}
public void setName(String name) {this.name = name;}
@ManyToOne(fetch = FetchType.LAZY, optional = false)
@JoinColumn(name = "STREET")
public Street getStreet() {return street;}
public void setStreet(Street street) {this.street = street;}
}
@Entity
@Table(name = "FNN_STREET")
public class Street {
private Long id;
private String name;
private Collection<House> houses;
@Id
public Long getId() {return id;}
public void setId(Long id) {this.id = id;}
@Column
public String getName() {return name;}
public void setName(String name) {this.name = name;}
@OneToMany(mappedBy = "street", fetch = FetchType.LAZY, cascade = CascadeType.REMOVE)
public Collection<House> getHouses() {return houses;}
public void setHouses(Collection<House> houses) {this.houses = houses;}
}
Test code:
House house = em.find(House.class, 2L);
LOGGER.info(house.getStreet().getId());
This code produces two queries in Wildfly 15 + Hibernate 5.3.7:
select ... from house where id=?;
select ... from street where id=?;
All previous Wildfly releases produced just one query due to lazy fetching on many-to-one relation: select ... from house where id=?;
How can one get proxy id without loading entire entity?
