Naming the value column of a map relation via @Column(name="foo_id") does not work. Example property (full entity attached):

@ElementCollection
@CollectionTable(name = "job_task_user", joinColumns =

)
@MapKeyJoinColumn(name = "task_id", nullable = false)
@Column(name="user_id", nullable = false)
private Map<Task, User> userTasks;

Expected: Column is named "user_id"
Result: Column name is the default name ("usertasks")