Spring Boot / Hibernate Select's before insert

Issue

When I'm trying to insert a row in the following table, Hibernate does a SELECT before each insert and I'd like to avoid that. I think that Hibernate does this SELECT before the insert to see if that object is new or not. That's why I have implemented Persistable interface and I have overridden the methods of this. The entity has combine id.

select groupreleq0_.equipment_id as equipmen3_22_0_, groupreleq0_.program_group_id as program_4_22_0_, groupreleq0_.description as descript1_22_0_, groupreleq0_.quantity as quantity2_22_0_ from group_m2m_equipment groupreleq0_ where groupreleq0_.equipment_id=? and groupreleq0_.program_group_id=?
select groupreleq0_.equipment_id as equipmen3_22_0_, groupreleq0_.program_group_id as program_4_22_0_, groupreleq0_.description as descript1_22_0_, groupreleq0_.quantity as quantity2_22_0_ from group_m2m_equipment groupreleq0_ where groupreleq0_.equipment_id=? and groupreleq0_.program_group_id=?
select groupreleq0_.equipment_id as equipmen3_22_0_, groupreleq0_.program_group_id as program_4_22_0_, groupreleq0_.description as descript1_22_0_, groupreleq0_.quantity as quantity2_22_0_ from group_m2m_equipment groupreleq0_ where groupreleq0_.equipment_id=? and groupreleq0_.program_group_id=?
select groupreleq0_.equipment_id as equipmen3_22_0_, groupreleq0_.program_group_id as program_4_22_0_, groupreleq0_.description as descript1_22_0_, groupreleq0_.quantity as quantity2_22_0_ from group_m2m_equipment groupreleq0_ where groupreleq0_.equipment_id=? and groupreleq0_.program_group_id=?
insert into group_m2m_equipment (description, quantity, equipment_id, program_group_id) values (?, ?, ?, ?)
insert into group_m2m_equipment (description, quantity, equipment_id, program_group_id) values (?, ?, ?, ?)
insert into group_m2m_equipment (description, quantity, equipment_id, program_group_id) values (?, ?, ?, ?)
insert into group_m2m_equipment (description, quantity, equipment_id, program_group_id) values (?, ?, ?, ?)

@AllArgsConstructor
@NoArgsConstructor
@EqualsAndHashCode
@Embeddable
@Getter
@Setter
public class GroupEquipmentPK implements Serializable {

    protected Long programGroupId;
    protected Long equipmentId;

}

@Entity
@AllArgsConstructor
@NoArgsConstructor
@Getter
@Setter
@Table(name = "group_m2m_equipment")
public class GroupRelEquipment implements Serializable, Persistable<GroupEquipmentPK> {

    @EmbeddedId
    private GroupEquipmentPK groupEquipmentPK = new GroupEquipmentPK();

    @ManyToOne(cascade = {CascadeType.PERSIST})
    @JsonIgnore
    @MapsId("equipmentId")
    private Equipment equipment;

    @ManyToOne(cascade = {CascadeType.PERSIST})
    @JsonIgnore
    @MapsId("programGroupId")
    private ProgramGroup programGroup;

    @Column(name = "description")
    private String description;

    @Column(name = "quantity ")
    private Integer quantity;

    @Transient
    private boolean isNew = true;

    public GroupRelEquipment(GroupEquipmentPK groupEquipmentPK, Equipment equipment, ProgramGroup programGroup, String description, Integer quantity) {
        this.groupEquipmentPK = groupEquipmentPK;
        this.equipment = equipment;
        this.programGroup = programGroup;
        this.description = description;
        this.quantity = quantity;
    }


    @Override
    public GroupEquipmentPK getId() {
        return this.groupEquipmentPK;
    }

    @Override
    public boolean isNew() {
        return isNew;
    }

    @PrePersist
    @PostLoad
    void markNotNew() {
        this.isNew = false;
    }
}

Solution

Hibernate does a SELECT query before the INSERT to check if this value is already exists... I found a solution for that by calling EntityManager object and use .persist() method insteed .save() and that's how I avoided those SELECTS

Answered By - Ugleethyn