Should it be possible to force an eager association to be loaded by a separate query using @Fetch(FetchMode.SELECT)?
I thought that Hibernate supported that for an EAGER association, but I see the documentation for FetchMode.SELECT <https://docs.jboss.org/hibernate/orm/5.4/userguide/html_single/Hibernate_User_Guide.html#fetching-fetch-annotation> says: "SELECT The association is going to be fetched lazily using a secondary select for each individual entity, collection, or join load. It’s equivalent to JPA FetchType.LAZY fetching strategy." The reason I ask is because I am trying to wrap up HHH-13085, which will change derived IDs mapped as a one-to-one association, currently loaded by a separate query, to instead be loaded in the same query that loads the dependent entity. I want to ensure that it is possible to revert back to loading that one-to-one association in a separate query after HHH-13085 is fixed. Currently, a StackOverflowError is thrown when loading an entity with an ID that is an bidirectional eager one-to-one association has FetchMode.SELECT mapped. @Entity(name = "Foo")public class Foo implements Serializable { @Id @GeneratedValue private Long id; @OneToOne(mappedBy = "foo", cascade = CascadeType.ALL) private Bar bar; } @Entity(name = "Bar")public class Bar implements Serializable { @Id @OneToOne(fetch = FetchType.EAGER) @Fetch(FetchMode.SELECT) @JoinColumn(name = "BAR_ID") private Foo foo; } According to the documentation, it sounds like @Fetch(FetchMode.SELECT) should make the association lazy. Is that really correct? Could someone please clarify the expected behavior? I created HHH-14390 <https://hibernate.atlassian.net/browse/HHH-14390> for the StackOverflowError. I've pushed some FailureExpected tests <https://github.com/hibernate/hibernate-orm/commit/b40d1251e385a5fdb018f9583a83c472d6da4e8f> that reproduce this issue. Thanks, Gail _______________________________________________ hibernate-dev mailing list -- hibernate-dev@lists.jboss.org To unsubscribe send an email to hibernate-dev-le...@lists.jboss.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
