[hibernate-issues] [JIRA] (HHH-16408) query.setMaxResults(1) with EntityGraph and @ElementCollection gives wrong result in Hibernate 6

Fouad Almalki ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMGE2MzIwOGU4... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16408?atlOrigin=eyJpIjoiMGE2Mz... ) HHH-16408 ( https://hibernate.atlassian.net/browse/HHH-16408?atlOrigin=eyJpIjoiMGE2Mz... ) query.setMaxResults(1) with EntityGraph and @ElementCollection gives wrong result in Hibernate 6 ( https://hibernate.atlassian.net/browse/HHH-16408?atlOrigin=eyJpIjoiMGE2Mz... ) Change By: Fouad Almalki ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Given: {code:java}@Table(name = "users") @Entity public class UserEntity { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name = "id") Integer id; @NotNull @Column(name = "username") String username; @ElementCollection @CollectionTable(name = "users_roles_mapping", joinColumns = @JoinColumn(name = "user_id")) @Column(name = "role_name") Set<String> roles; // ... }{code} {code:sql} -- MSSQL 2022 CREATE TABLE users ( id INT NOT NULL IDENTITY, username VARCHAR(50) NOT NULL, CONSTRAINT pk_users PRIMARY KEY (id) ); CREATE TABLE roles ( name VARCHAR(50) NOT NULL, CONSTRAINT pk_roles PRIMARY KEY (name) ); CREATE TABLE users_roles_mapping ( user_id INT NOT NULL, role_name VARCHAR(50) NOT NULL, CONSTRAINT pk_users_roles_mapping PRIMARY KEY (user_id, role_name), CONSTRAINT fk_users_roles_mapping_user FOREIGN KEY (user_id) REFERENCES users (id), CONSTRAINT fk_users_roles_mapping_role FOREIGN KEY (role_name) REFERENCES roles (name) ); INSERT INTO users (username) VALUES ('user1'); INSERT INTO roles (name) VALUES ('role1'), ('role2'); INSERT INTO users_roles_mapping (user_id, role_name) VALUES (1, 'role1'), (1, 'role2');{code} {code:java}public Set<String> getUserRoles() { EntityGraph<UserEntity> entityGraph = entityManager.createEntityGraph(UserEntity.class); entityGraph.addAttributeNodes("roles"); Query query = entityManager.createQuery("SELECT u FROM UserEntity u WHERE u.id = 1"); query.setMaxResults(1); query.setHint(EntityGraphType.FETCH.getKey(), entityGraph); UserEntity userEntity = (UserEntity) query.getSingleResult(); return userEntity.getRoles(); }{code} {{getUserRoles}} returns 2 roles in Hibernate {{5.6.15.Final}} and returns 1 role (which is wrong) in Hibernate {{6.1.7}}. ( https://hibernate.atlassian.net/browse/HHH-16408#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16408#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#100221- sha1:57c27f3 )