Christian Beikov ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HHH-15553 ( https://hibernate.atlassian.net/browse/HHH-15553?atlOrigin=eyJpIjoiOTMyMD... ) Re: Not possible to fetch content from mapping tables, that only have <composite-id> attributes. ( https://hibernate.atlassian.net/browse/HHH-15553?atlOrigin=eyJpIjoiOTMyMD... ) There is no “single PR” that fixes this particular issue. Like I tried to point out, this was fixed as part of the major type system re-design in Hibernate 6, so this is not something that can be “backported”. I would have to be implemented for Hibernate 5.6. Having said that, I’d like to point out, that this should work also in 5.6 if you are using the annotation model: @Entity public class CompIdVOImpl implements CompIdVO, Serializable { @Id @Column(length = 32) private String id1; @Id @Column(length = 32) private String id2; public CompIdVOImpl() { } public CompIdVOImpl( String id1, String id2) { this.id1 = id1; this.id2 = id2; } @Override public String getId1() { return id1; } @Override public void setId1( String id1) { this.id1 = id1; } @Override public String getId2() { return id2; } @Override public void setId2( String id2) { this.id2 = id2; } } ( https://hibernate.atlassian.net/browse/HHH-15553#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-15553#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#100209- sha1:392b984 )