基準クエリのない手動メソッド
このコードを使用して、2 つの主キーを持ち、それ自体が外部キーである別のテーブル ThirdPartyHasOwner との左結合を使用して、Thirdparty を含む結果セットを取得しました。以下のコードは正しい結果データセットを取得します。
Query query = emManager.createQuery("SELECT c FROM ThirdParty c LEFT JOIN ThirdPartyHasOwner b ON b.id.third_party_Id = c.id WHERE b.id.ownerId=1");
List<ThirdParty> thirdParties = query.getResultList();
Criteria Builder と Criteria Query を使用
ただし、条件ビルダーとクエリを使用すると、結果セットは間違ったデータセットを返します。コードは以下に示されているので、上記の手動クエリと基準クエリの両方が同じクエリを返すかどうかを確認する<property name="eclipselink.logging.level" value="FINE"/>ために、基準クエリのない上記のコードと基準クエリのある以下のコードの両方が同じクエリを返したプロパティを追加しましたコードとコンソールの両方の結果以下に与えられる
CriteriaBuilder cb = emManager.getCriteriaBuilder();
CriteriaQuery<ThirdParty> cq = cb.createQuery(ThirdParty.class);
Root<ThirdParty> a = cq.from(ThirdParty.class);
Join<ThirdParty, ThirdPartyHasOwner> b = a.join("thirdPartyHasOwners", JoinType.LEFT);
ParameterExpression<Integer> balance = cb.parameter(Integer.class);
Path<Integer> path = b.get("id").get("ownerId");
cq.where(cb.gt(path, balance));
cq.select(a);
TypedQuery<ThirdParty> queryS = emManager.createQuery(cq);
List<ThirdParty> results = queryS.setParameter(balance, 1).getResultList();
コンソールの結果 ( 1 つ目はCriteria Query用、2 つ目は手動メソッド用)
[EL Fine]: sql: 2017-01-04 06:42:44.026--ServerSession(514728045)--Connection(1288428548)--Thread(Thread[http-bio-8080-exec-3,5,main])--SELECT t1.Id, t1.ADDRESS, t1.CONTACTNO, t1.CREATEDDATE, t1.EMAIL, t1.NAME FROM third_party t1 LEFT OUTER JOIN third_party_has_owner t0 ON (t0.THIRD_PARTY_ID = t1.Id) WHERE (t0.owner_id > ?)
bind => [1]
[EL Fine]: sql: 2017-01-04 06:48:26.109--ServerSession(514728045)--Connection(1288428548)--Thread(Thread[http-bio-8080-exec-3,5,main])--SELECT t1.Id, t1.ADDRESS, t1.CONTACTNO, t1.CREATEDDATE, t1.EMAIL, t1.NAME FROM third_party t1 LEFT OUTER JOIN third_party_has_owner t0 ON (t0.THIRD_PARTY_ID = t1.Id) WHERE (t0.owner_id = ?)
bind => [1]
手動クエリと基準クエリの両方の結果(結果変数には基準クエリを使用した結果である間違ったデータがあり、サードパーティ変数には手動メソッドの結果である正しいデータ セットがあります)
最後になりましたが、私が使用しjavax.persistence.persistence-apiているのは eclipselinkです
サード パーティのモデル クラス
/**
* The persistent class for the third_party database table.
*
*/
@Entity
@Table(name="third_party")
@NamedQuery(name="ThirdParty.findAll", query="SELECT t FROM ThirdParty t")
public class ThirdParty implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="Id")
private int id;
private String address;
private String contactNo;
@Temporal(TemporalType.TIMESTAMP)
private Date createdDate;
private String email;
private String name;
//bi-directional many-to-one association to ThirdPartyHasOwner
@OneToMany(mappedBy="thirdParty")
private List<ThirdPartyHasOwner> thirdPartyHasOwners;
//bi-directional many-to-one association to ThirdSeatAllocation
@OneToMany(mappedBy="thirdParty")
private List<ThirdSeatAllocation> thirdSeatAllocations;
public ThirdParty() {
}
public int getId() {
return this.id;
}
public void setId(int id) {
this.id = id;
}
public String getAddress() {
return this.address;
}
public void setAddress(String address) {
this.address = address;
}
public String getContactNo() {
return this.contactNo;
}
public void setContactNo(String contactNo) {
this.contactNo = contactNo;
}
public Date getCreatedDate() {
return this.createdDate;
}
public void setCreatedDate(Date createdDate) {
this.createdDate = createdDate;
}
public String getEmail() {
return this.email;
}
public void setEmail(String email) {
this.email = email;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public List<ThirdPartyHasOwner> getThirdPartyHasOwners() {
return this.thirdPartyHasOwners;
}
public void setThirdPartyHasOwners(List<ThirdPartyHasOwner> thirdPartyHasOwners) {
this.thirdPartyHasOwners = thirdPartyHasOwners;
}
public ThirdPartyHasOwner addThirdPartyHasOwner(ThirdPartyHasOwner thirdPartyHasOwner) {
getThirdPartyHasOwners().add(thirdPartyHasOwner);
thirdPartyHasOwner.setThirdParty(this);
return thirdPartyHasOwner;
}
public ThirdPartyHasOwner removeThirdPartyHasOwner(ThirdPartyHasOwner thirdPartyHasOwner) {
getThirdPartyHasOwners().remove(thirdPartyHasOwner);
thirdPartyHasOwner.setThirdParty(null);
return thirdPartyHasOwner;
}
public List<ThirdSeatAllocation> getThirdSeatAllocations() {
return this.thirdSeatAllocations;
}
public void setThirdSeatAllocations(List<ThirdSeatAllocation> thirdSeatAllocations) {
this.thirdSeatAllocations = thirdSeatAllocations;
}
public ThirdSeatAllocation addThirdSeatAllocation(ThirdSeatAllocation thirdSeatAllocation) {
getThirdSeatAllocations().add(thirdSeatAllocation);
thirdSeatAllocation.setThirdParty(this);
return thirdSeatAllocation;
}
public ThirdSeatAllocation removeThirdSeatAllocation(ThirdSeatAllocation thirdSeatAllocation) {
getThirdSeatAllocations().remove(thirdSeatAllocation);
thirdSeatAllocation.setThirdParty(null);
return thirdSeatAllocation;
}
}
サードパーティのモデル クラスに所有者がいる
/**
* The persistent class for the third_party_has_owner database table.
*
*/
@Entity
@Table(name="third_party_has_owner")
@NamedQuery(name="ThirdPartyHasOwner.findAll", query="SELECT t FROM ThirdPartyHasOwner t")
public class ThirdPartyHasOwner implements Serializable {
private static final long serialVersionUID = 1L;
@EmbeddedId
private ThirdPartyHasOwnerPK id;
@Temporal(TemporalType.DATE)
private Date createdDate;
//bi-directional many-to-one association to Owner
@ManyToOne
private Owner owner;
//bi-directional many-to-one association to ThirdParty
@ManyToOne
@JoinColumn(name="third_party_Id")
private ThirdParty thirdParty;
public ThirdPartyHasOwner() {
}
public ThirdPartyHasOwnerPK getId() {
return this.id;
}
public void setId(ThirdPartyHasOwnerPK id) {
this.id = id;
}
public Date getCreatedDate() {
return this.createdDate;
}
public void setCreatedDate(Date createdDate) {
this.createdDate = createdDate;
}
public Owner getOwner() {
return this.owner;
}
public void setOwner(Owner owner) {
this.owner = owner;
}
public ThirdParty getThirdParty() {
return this.thirdParty;
}
public void setThirdParty(ThirdParty thirdParty) {
this.thirdParty = thirdParty;
}
}
それで、基準クエリで何か間違ったことをしたのですか、それとも奇妙なバグですか?