Kurt Gollhardt ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNjY3YzJmYzE2... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16018?atlOrigin=eyJpIjoiNjY3Yz... ) HHH-16018 ( https://hibernate.atlassian.net/browse/HHH-16018?atlOrigin=eyJpIjoiNjY3Yz... ) ClassCastException on HQL CASE/WHEN w/Entity type - SingleTableEntityPersister vs BasicValuedMapping ( https://hibernate.atlassian.net/browse/HHH-16018?atlOrigin=eyJpIjoiNjY3Yz... ) Issue Type: Bug Affects Versions: 6.1.6 Assignee: Unassigned Components: query-hql Created: 10/Jan/2023 17:38 PM Priority: Major Reporter: Kurt Gollhardt ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) The CaseSearchedExpression constructor casts the type parameter to BasicValuedMapping. This gets a ClassCastException when the type is a SingleTableEntityPersister. For example: select case when true then customer1 else customer2 end from TransactRecord @Entity(name = "TransactRecord" ) class TransactRecord { @JoinColumn(name = "CUSTOMER1" , nullable = true ) @ManyToOne(fetch = FetchType.EAGER) @LazyToOne(LazyToOneOption.FALSE) private CustomerRecord customer1; @JoinColumn(name = "CUSTOMER2" , nullable = true ) @ManyToOne(fetch = FetchType.EAGER) @LazyToOne(LazyToOneOption.FALSE) private CustomerRecord customer2; } @Entity(name = "CustomerRecord" ) class CustomerRecord { // ... } This worked in 5.4.22. Workaround: The Simple Case expression does not have this problem. For example: select case property when value then customer1 else customer2 end from TransactRecord ( https://hibernate.atlassian.net/browse/HHH-16018#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16018#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#100213- sha1:cca7326 )