Primary key constraint generated for a "Set" based ElementCollection in Hibernate
Issue
-
Defining an
@ElementCollectionwith an@Embeddabletype usingjava.util.Set@Embeddable public class Task implements Serializable { @Column(nullable = false) private String name; .... } @Entity public class Employee ... { ... @ElementCollection @CollectionTable(name = "employee_tasks" ...) private Set<Task> tasks = new HashSet<Task>(); ... } -
Hibernate generates a primary key constraint on the collection table
create table employee_tasks ( Employee_name varchar(255) not null, name varchar(255) not null, primary key (Employee_name, name) ) -
No primary key constraint is generated when using
java.util.List
Environment
- Red Hat JBoss Enteprise Application Platform (EAP) 7
- Hibernate 5
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