[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-7216) "java.lang.IllegalStateException: No supertype found" thrown on query with "COUNT" aggregate function

"java.lang.IllegalStateException: No supertype found" thrown on query with "COUNT" aggregate function ----------------------------------------------------------------------------------------------------- Key: HHH-7216 URL: https://hibernate.onjira.com/browse/HHH-7216 Project: Hibernate ORM Issue Type: Bug Components: core, entity-manager, query-criteria Affects Versions: 4.1.1 Reporter: Tomas Milo Priority: Critical Labels: criteria, jpa2, query I have 2 entities: {code} @Entity public class Transaction { @Id @Column private Integer trId; ... } {code} {code} @Entity public class Form { @Id @OneToOne @JoinColumn( name = "trId" ) private Transaction transaction; @Column private String firstname; ... } {code} And query: {code} private EntityManager em; ... CriteriaBuilder cb = em.getCriteriaBuilder(); CriteriaQuery<Long> c = cb.createQuery( Long.class ); Root<Form> form = c.from( Form.class ); c.select( cb.count( form ) ); TypedQuery<Long> q = em.createQuery( c ); int count = q.getResultList().get( 0 ).intValue(); {code} Following exception was thrown on execution of "TypedQuery<Long> q = em.createQuery( c );": Caused by: java.lang.IllegalStateException: No supertype found at org.hibernate.ejb.metamodel.AbstractIdentifiableType.requireSupertype(AbstractIdentifiableType.java:85) at org.hibernate.ejb.metamodel.AbstractIdentifiableType.getIdType(AbstractIdentifiableType.java:173) at org.hibernate.ejb.criteria.expression.function.AggregationFunction$COUNT.renderArguments(AggregationFunction.java:110) at org.hibernate.ejb.criteria.expression.function.ParameterizedFunctionExpression.render(ParameterizedFunctionExpression.java:94) at org.hibernate.ejb.criteria.expression.function.BasicFunctionExpression.renderProjection(BasicFunctionExpression.java:71) at org.hibernate.ejb.criteria.QueryStructure.render(QueryStructure.java:250) at org.hibernate.ejb.criteria.CriteriaQueryImpl.render(CriteriaQueryImpl.java:338) at org.hibernate.ejb.criteria.CriteriaQueryCompiler.compile(CriteriaQueryCompiler.java:216) at org.hibernate.ejb.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:623) I think the problem is in the org.hibernate.ejb.metamodel.AbstractIdentifiableType.getIdType() function, which is not prepared for "mapped identifier" (as is org.hibernate.ejb.metamodel.MetadataContext.applyIdMetadata procedure).