Tomáš Müller ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5b50823... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNmJlY2UzZjQw... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16513?atlOrigin=eyJpIjoiNmJlY2... ) HHH-16513 ( https://hibernate.atlassian.net/browse/HHH-16513?atlOrigin=eyJpIjoiNmJlY2... ) Wrong query generated for a parent-child relation within the same table ( https://hibernate.atlassian.net/browse/HHH-16513?atlOrigin=eyJpIjoiNmJlY2... ) Change By: Tomáš Müller ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5b50823... ) While migrating to the latest version of Hibernate, we have discovered an issue with how queries are generated for parent-child relations within the same table. Here is a simple example , we. We have an entity that may point (optionally) points to itself to provide a parent-child relation: {noformat} @Entity @Table(name = "subpart") public class SchedulingSubpart { private Long id; private SchedulingSubpart parentSubpart; @Id @Column(name = "id") public Long getId() { return id; } public void setId(Long id) { this.id = id; } @ManyToOne(optional = true) @JoinColumn(name = "parent") public SchedulingSubpart getParentSubpart() { return parentSubpart; } public void setParentSubpart(SchedulingSubpart parentSubpart) { this.parentSubpart = parentSubpart; } } {noformat} For the following HQL {{ select s.id, p.id from SchedulingSubpart s inner join s.parentSubpart p }} generates the following SQL gets generated {noformat} select s1_0.id from subpart s1_0 join subpart p1_0 on p1_0.id=s1_0.parent {noformat} And returning the This is not correct. The same id is returned for the subpart entity and its parent (p1_0.id is not returned). See [^SchedulingSubpart.java] [^ORMStandaloneTestCase.java] for more details. ( https://hibernate.atlassian.net/browse/HHH-16513#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16513#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#100223- sha1:cdc0af3 )