Associated entity with OneToOne mapping coming in as null - Hibernate

Hibernate ORM
1

I have two entities: TableA and TableB. When I fetch TableA, TableB is always null. What am I doing wrong?
This is how I am getting it:

CriteriaBuilder builder = session.getCriteriaBuilder();
CriteriaQuery criteriaQuery = builder.createQuery(TableA.class);
Root from = criteriaQuery.from(TableA.class);
criteriaQuery.select(from);

This is the Query made:

select generatedAlias0 from TableA as generatedAlias0

TableA:

@Entity
@Table(name = “TableA”)
public class TableA implements Serializable {

@Id
@Column(name = "id", nullable = false)
private Integer id = null;

@Id
@Column(name = “active”, nullable = false)
private Integer active = null;

private Integer parentId = null;

private String myColA = null;

@OneToOne(fetch = FetchType.EAGER)
@JoinColumns({
        @JoinColumn(name = "id", referencedColumnName = "parentId"),
        @JoinColumn(name = "active", referencedColumnName = "active")}
)
@Where(clause = "active=1")
private TableB TableB = null;

private Boolean ignorePlanCutoff = null;

}

TableB:

@Entity
@Table(name = “TableB”)
public class TableB implements Serializable {

@Id
@Column(name = "id", nullable = false)
private Integer id = null;

@Id
@Column(name = “active”, nullable = false)
private Integer active = null;

private Integer parentId = null;

private Boolean colB = null;

}

Both these entities have composite IDs, not showing that here for brevity.

2

What SQL query is executed? How does your data look like?

3

I put the mappedBy in TableA and JoinColumn in TableB which solved the issue. Thank you for responding.