在本机查询的运行时 (Hibernate/JPA) 临时将 FetchType.LAZY 更改为 FetchType.EAGER

Question

I have following repository method

@Query(value = "SELECT * FROM property p JOIN address a USING(a_id) JOIN address pa ON p.post_a_id = pa.a_id " +
        "JOIN section s ON s.p_id = p.p_id " +
        "WHERE p.organization_id = :orgId AND p.name ILIKE " +
        "ANY(SELECT UNNEST(ARRAY(SELECT CONCAT('%', UNNEST(STRING_TO_ARRAY(:search, ' ')), '%'))))",
        nativeQuery = true)
Page<Property> findPropertiesByOrganizationIdAndName(@Param("orgId") Long organizationId,
                                                     @Param("search") String search,
                                                     Pageable pageable);

But it gets LazyInitializationException when it tries to get Section entity

how to dynamically change fetch type of Section enity but with native sql?

Property Entity:

@Entity
@Table
public class Property extends CreatedDateAuditedEntity {
         @OneToMany(mappedBy = "property", cascade = CascadeType.REMOVE)
         @Fetch(value = FetchMode.SUBSELECT)
         private Set<Section> sections = new HashSet<>();
}

Section entity:

@Entity
public class Section extends CreatedDateAuditedEntity {

@ManyToOne(cascade = CascadeType.MERGE, fetch = FetchType.LAZY)
@JoinColumn(name = "p_id", referencedColumnName = "p_id", updatable = false, nullable = false)
private Property property;

}

Answer 1

You need to create a CustomDialect that extends from the class of the dialect you are using and in the registrar the functions that you cannot use with JPQL in the following way:

 public CustomDialect() {
    super();

    registerFunction(
        "func_custom",
        new StandardSQLFunction(
            "func_custom",
            StandardBasicTypes.STRING
        )
    );
}

and where do you set the dialect:

<property name="hibernate.dialect" value="your.package.CustomDialect"/>