Question

My Entity mapping is as follows:

public class EntertainmentContentBean implements Serializable, Cloneable {
.
.
.
@ManyToMany
    @Cache(usage = CacheConcurrencyStrategy.TRANSACTIONAL)
    @JoinTable(schema = "etmt", name = "content_operator", joinColumns = @JoinColumn(name = "content_id"), inverseJoinColumns = @JoinColumn(name = "operator_id"))
    public Set<Operator> getOperators() {
        return operators;
    }
.
.
.

}

I’ve a specific requirement where I want to retrieve EntertainmentContentBean records based on following criteria:

• If no operator records are present
• If operator records are present, then operator list should contain the operator object passed are the parameter

I tried following query but it is not returning expected records:

SELECT NEW MAP (content AS content, id AS record_id)
        FROM EntertainmentContentBean contentEntry
        WHERE (contentEntry.operators is empty or (select op from Operator op where lower(op.key) = lower(:operator)) MEMBER OF contentEntry.operators))

Answer 1

I ended up using subquery to get the desired results.