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How to remove given dependent entity fields from query using hibernate criteria?
There are two classes: A and B and, accordingly, tables in the database corresponding to these classes.
Class B has a LOB field that you don't want to fetch with every request.
How is it possible, by pumping out the list of entities A, to pull out the list of B-nis, but without the data field, and all this using criteria query ?
@Entity
@Table(name = "A")
public class A implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id")
private Long id;
@OneToMany(mappedBy = "order", fetch = FetchType.LAZY)
@Cascade(CascadeType.ALL)
private List<B> list = new LinkedList<>();
}
@Entity
@Table(name = "B")
public class B implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id")
private Long id;
@Column(name = "data", nullable = false)
@Lob
private byte[] data;
@ManyToOne(targetEntity = A.class, fetch = FetchType.EAGER)
@JoinColumn(name = "A_id", nullable = false)
private A a;
}
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so fit?
@Entity
@Table(name = "B")
public class B implements Serializable {
...
@Column(name = "data", nullable = false)
@Lob
@javax.persistence.Basic(fetch=FetchType.LAZY)
private byte[] data;
...
}
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