When you have a "child" table that, for whatever reason, only has a single real column in it, then you can use `ElementCollection` for the mapping to avoid some of the hassle w/ creating a real entity and repo. This is especially useful when using Spring Data Rest and you want to be able to easily add/edit/delete the values in this association.

SingleColumnDatabaseMapping.java

//All of the fancy annotations are mostly here if you want to generate the DDL via Hibernate
@Size(min = 10)  // If you want to limit the max size of the array
@ElementCollection(fetch = FetchType.EAGER)
@CollectionTable(name = 'IssueRequestor', joinColumns = [@JoinColumn(name = 'IssueID')],
        uniqueConstraints = [ @UniqueConstraint(name = 'IssueRequestor_uc_issueId_requestor',
                                                columnNames = ['IssueID', 'requestor'])])
@Column(name = 'requestor', length = 150)
Set<String> requestors = []