Guillaume Toison ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=70121%3... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZjc2ZDA4NzZj... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16744?atlOrigin=eyJpIjoiZjc2ZD... ) HHH-16744 ( https://hibernate.atlassian.net/browse/HHH-16744?atlOrigin=eyJpIjoiZjc2ZD... ) Wrong class created when reusing a join column for different entities in multiple ManyToOne ( https://hibernate.atlassian.net/browse/HHH-16744?atlOrigin=eyJpIjoiZjc2ZD... ) Issue Type: Bug Affects Versions: 6.2.4 Assignee: Unassigned Components: hibernate-core Created: 03/Jun/2023 13:47 PM Priority: Major Reporter: Guillaume Toison ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=70121%3... ) Consider the following abridged model (please note the reused food_id column and the self-referencing @ManyToOne in Fruit and Cheese ): class Container { } class FruitContainer extends Container { @ManyToOne @JoinColumn(name = "food_id" ) @Fetch(FetchMode.SELECT) private Fruit fruit; } class CheeseContainer extends Container { @ManyToOne @JoinColumn(name = "food_id" ) @Fetch(FetchMode.SELECT) private Cheese cheese; } class Food { } class Fruit extends Food { @ManyToOne @Fetch(FetchMode.SELECT) private Fruit bestPairedWith; } class Cheese extends Food { @ManyToOne @Fetch(FetchMode.SELECT) private Cheese bestPairedWith; } When batch-loading several Container objects, Hibernate seems to create the wrong class (a Cheese instead of a Fruit ) I’m not sure if reusing a column in different branches of an inheritance tree is supported but this seemed to work in Hibernate 5. In Hibernate 6 an initializer seems to be associated with the column during the batch load but it only works for one of the types. ( https://hibernate.atlassian.net/browse/HHH-16744#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16744#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100225- sha1:e03cc87 )