1
Java 8をSpring 4.3.1.RELEASE,JPA 2およびHibernate 5.2.1.FinalおよびMySQLと使用しています。同じクエリの複数を実行するHibernate
hibernate.dialect = org.hibernate.dialect.MySQLDialect
hibernate.show_sql = true
hibernate.format_sql = true
私はシンプルSELECT文を行い、次のコードを、持っている：
import java.util.List;
import org.springframework.stereotype.Repository;
import com.jobs.spring.domain.Category;
@Repository("categoryDao")
public class CategoryDaoImpl extends JpaDao<String, Category> implements CategoryDao {
@Override
public List<Category> findAll() {
List<Category> categories = (List<Category>) entityManager.createQuery("Select t from " + entityClass.getSimpleName() + " t order by name").getResultList();
return categories;
}
}
私は、コードをデバッグする場合は、このメソッドは一度だけ呼ばれていますが、以下の出力からわかるように、 Hibernateは同じSQL文を複数回実行しています。
10:52:13,960 INFO [stdout] (default task-4) Hibernate: 10:52:13,962 INFO [stdout] (default task-4) select 10:52:13,962 INFO [stdout] (default task-4) category0_.id as id1_0_, 10:52:13,962 INFO [stdout] (default task-4) category0_.ICON as ICON2_0_, 10:52:13,963 INFO [stdout] (default task-4) category0_.CATERGORY as CATERGOR3_0_ 10:52:13,963 INFO [stdout] (default task-4) from 10:52:13,964 INFO [stdout] (default task-4) category category0_ 10:52:13,964 INFO [stdout] (default task-4) order by 10:52:13,965 INFO [stdout] (default task-4) category0_.CATERGORY 10:52:14,399 INFO [stdout] (default task-4) Hibernate: 10:52:14,400 INFO [stdout] (default task-4) select 10:52:14,400 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:14,401 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:14,402 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:14,402 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:14,403 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:14,403 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:14,404 INFO [stdout] (default task-4) from 10:52:14,404 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:14,405 INFO [stdout] (default task-4) where 10:52:14,406 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:14,813 INFO [stdout] (default task-4) Hibernate: 10:52:14,814 INFO [stdout] (default task-4) select 10:52:14,815 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:14,815 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:14,816 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:14,816 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:14,817 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:14,817 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:14,818 INFO [stdout] (default task-4) from 10:52:14,819 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:14,819 INFO [stdout] (default task-4) where 10:52:14,820 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:15,219 INFO [stdout] (default task-4) Hibernate: 10:52:15,220 INFO [stdout] (default task-4) select 10:52:15,221 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:15,221 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:15,222 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:15,222 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:15,223 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:15,223 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:15,224 INFO [stdout] (default task-4) from 10:52:15,225 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:15,225 INFO [stdout] (default task-4) where 10:52:15,226 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:15,637 INFO [stdout] (default task-4) Hibernate: 10:52:15,637 INFO [stdout] (default task-4) select 10:52:15,638 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:15,638 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:15,639 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:15,640 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:15,640 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:15,641 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:15,641 INFO [stdout] (default task-4) from 10:52:15,642 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:15,642 INFO [stdout] (default task-4) where 10:52:15,643 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:16,079 INFO [stdout] (default task-4) Hibernate: 10:52:16,080 INFO [stdout] (default task-4) select 10:52:16,080 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:16,081 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:16,081 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:16,082 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:16,082 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:16,083 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:16,084 INFO [stdout] (default task-4) from 10:52:16,084 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:16,085 INFO [stdout] (default task-4) where 10:52:16,085 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:16,819 INFO [stdout] (default task-4) Hibernate: 10:52:16,819 INFO [stdout] (default task-4) select 10:52:16,820 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:16,820 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:16,821 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:16,822 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:16,822 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:16,823 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:16,824 INFO [stdout] (default task-4) from 10:52:16,824 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:16,825 INFO [stdout] (default task-4) where 10:52:16,825 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:17,943 INFO [stdout] (default task-4) Hibernate: 10:52:17,944 INFO [stdout] (default task-4) select 10:52:17,945 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:17,945 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:17,946 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:17,946 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:17,947 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:17,947 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:17,948 INFO [stdout] (default task-4) from 10:52:17,949 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:17,949 INFO [stdout] (default task-4) where 10:52:17,950 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:19,460 INFO [stdout] (default task-4) Hibernate: 10:52:19,461 INFO [stdout] (default task-4) select 10:52:19,462 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:19,462 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:19,463 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:19,463 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:19,464 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:19,464 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:19,465 INFO [stdout] (default task-4) from 10:52:19,465 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:19,466 INFO [stdout] (default task-4) where 10:52:19,467 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:20,521 INFO [stdout] (default task-4) Hibernate: 10:52:20,521 INFO [stdout] (default task-4) select 10:52:20,522 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:20,523 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:20,523 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:20,524 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:20,524 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:20,525 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:20,525 INFO [stdout] (default task-4) from 10:52:20,526 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:20,526 INFO [stdout] (default task-4) where 10:52:20,527 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:20,965 INFO [stdout] (default task-4) Hibernate: 10:52:20,966 INFO [stdout] (default task-4) select 10:52:20,966 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:20,967 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:20,968 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:20,968 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:20,969 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:20,969 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:20,970 INFO [stdout] (default task-4) from 10:52:20,970 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:20,971 INFO [stdout] (default task-4) where 10:52:20,971 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:21,364 INFO [stdout] (default task-4) Hibernate: 10:52:21,365 INFO [stdout] (default task-4) select 10:52:21,365 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:21,366 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:21,366 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:21,367 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:21,367 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:21,368 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:21,368 INFO [stdout] (default task-4) from 10:52:21,369 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:21,370 INFO [stdout] (default task-4) where 10:52:21,370 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:21,774 INFO [stdout] (default task-4) Hibernate: 10:52:21,774 INFO [stdout] (default task-4) select 10:52:21,775 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:21,775 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:21,776 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:21,777 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:21,777 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:21,778 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:21,778 INFO [stdout] (default task-4) from 10:52:21,779 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:21,779 INFO [stdout] (default task-4) where 10:52:21,780 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:22,194 INFO [stdout] (default task-4) Hibernate: 10:52:22,195 INFO [stdout] (default task-4) select 10:52:22,195 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:22,196 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:22,196 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:22,197 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:22,197 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:22,198 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:22,199 INFO [stdout] (default task-4) from 10:52:22,199 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:22,200 INFO [stdout] (default task-4) where 10:52:22,200 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:22,590 INFO [stdout] (default task-4) Hibernate: 10:52:22,590 INFO [stdout] (default task-4) select 10:52:22,591 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:22,591 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:22,592 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:22,592 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:22,593 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:22,594 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:22,594 INFO [stdout] (default task-4) from 10:52:22,595 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:22,595 INFO [stdout] (default task-4) where 10:52:22,596 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=? 10:52:23,009 INFO [stdout] (default task-4) Hibernate: 10:52:23,010 INFO [stdout] (default task-4) select 10:52:23,010 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_0_, 10:52:23,011 INFO [stdout] (default task-4) subcategor0_.id as id1_21_0_, 10:52:23,012 INFO [stdout] (default task-4) subcategor0_.id as id1_21_1_, 10:52:23,012 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID as CATEGORY4_21_1_, 10:52:23,013 INFO [stdout] (default task-4) subcategor0_.ICON as ICON2_21_1_, 10:52:23,013 INFO [stdout] (default task-4) subcategor0_.SUBCATEGORY as SUBCATEG3_21_1_ 10:52:23,014 INFO [stdout] (default task-4) from 10:52:23,015 INFO [stdout] (default task-4) subcategory subcategor0_ 10:52:23,015 INFO [stdout] (default task-4) where 10:52:23,016 INFO [stdout] (default task-4) subcategor0_.CATEGORY_ID=?
誰かがHibernateに期待どおりに一度だけクエリを実行させる方法をアドバイスできれば、私はそれを感謝します。
は、以下のアドバイスをありがとうCategory.java
@Entity
@Table(name="category")
@XmlRootElement(name="category")
public class Category extends AbstractDomain<String> {
@Id
private String id;
@Size(min=3, max=55)
@Column(name = "CATERGORY", nullable = false)
private String name;
@JsonIgnore
@OneToMany(cascade = CascadeType.ALL, fetch=FetchType.EAGER, mappedBy = "category")
private Set<SubCategory> subCategories;
@JsonIgnore
@Basic(fetch=FetchType.LAZY)
@Lob
@Column(name = "ICON", nullable = true)
private byte[] icon;
@Transient
private byte[] icon64;
@XmlElement
public byte[] getIcon64() {
return icon64;
}
public void setIcon64(byte[] icon64) {
this.icon64 = icon64;
}
@XmlElement
public byte[] getIcon() {
return icon;
}
public void setIcon(byte[] icon) {
this.icon = icon;
}
@XmlElement
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
@XmlElement
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<SubCategory> getSubCategories() {
return subCategories;
}
public void setSubCategories(Set<SubCategory> subCategories) {
this.subCategories = subCategories;
}
}
UPDATE：
UPDATE
は、ここに私のModelオブジェクトです。
public List<Category> findAll() {
List<Category> categories = (List<Category>) entityManager.createQuery("Select t from " + entityClass.getSimpleName() + " t JOIN FETCH com.jobs.spring.domain.SubCategory order by t.name").getResultList();
return categories;
}
しかし、それでもまだエラーを取得：
List<Category> categories = (List<Category>) entityManager.createQuery("Select c from Category c JOIN FETCH c.subCategories s order by c.name").getResultList();
：私は次のようにコードを更新
11:29:42,188 INFO [stdout] (default task-2) Hibernate:
11:29:42,188 INFO [stdout] (default task-2) select
11:29:42,188 INFO [stdout] (default task-2) category0_.id as id1_0_,
11:29:42,188 INFO [stdout] (default task-2) category0_.ICON as ICON2_0_,
11:29:42,188 INFO [stdout] (default task-2) category0_.CATERGORY as CATERGOR3_0_
11:29:42,188 INFO [stdout] (default task-2) from
11:29:42,188 INFO [stdout] (default task-2) category category0_
11:29:42,189 INFO [stdout] (default task-2) inner join
11:29:42,189 INFO [stdout] (default task-2) subcategory subcategor1_
11:29:42,189 INFO [stdout] (default task-2) on
11:29:42,189 INFO [stdout] (default task-2) order by
11:29:42,189 INFO [stdout] (default task-2) category0_.CATERGORY
11:29:42,536 WARN [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-2) SQL Error: 1064, SQLState: 42000
11:29:42,537 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-2) You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'order by category0_.CATERGORY' at line 1
11:29:43,306 ERROR [io.undertow.request] (default task-2) UT005023: Exception handling request to /jbosswildfly-1.0/category/list: org.springframework.web.util.NestedServletException: Request processing failed; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
UPDATE
を私は次のようにコードを更新しますエラーは発生しませんが、カテゴリの重複だけが返されます。サブカテゴリーはありません。だから私は薄い私はSELECTのものを変更する必要があります。
私が試してみました：
SELECT * (unexpected token: * near line 1)
SELECT c, s (same as SELECT c)
ここで 'findAll（）'メソッドを使用します。 JPA 2.0でfindAll（）がすでに実装されているとします。メソッド名を変更してチェックしてください。 –
こんにちはRajith、応答のおかげで。私はあなたの質問を完全に理解していません。 'findAll（）'はRESTfulなサービスから呼び出されます。上記の説明をクラス全体を含むように変更しました。 – Richard