CteInsertStrategy 只能与支持 CTE 的方言一起使用，这些方言也可以采用 UPDATE 或 DELETE 语句

Question

带有 PostgreSQL JDBC 驱动程序 42.3.5 的 Hibernate 6.0.1 导致以下异常：

java.lang.UnsupportedOperationException:
CteInsertStrategy can only be used with Dialects that support CTE that can take UPDATE or DELETE statements as well
at org.hibernate.query.sqm.mutation.internal.cte.CteInsertStrategy.<init>(CteInsertStrategy.java:123)
at org.hibernate.query.sqm.mutation.internal.cte.CteInsertStrategy.<init>(CteInsertStrategy.java:107)
at org.hibernate.dialect.PostgreSQLDialect.getFallbackSqmInsertStrategy(PostgreSQLDialect.java:704)
...

出了什么问题，我该如何解决？

MyEntity.java

import jakarta.persistence.*;

@Entity
@Table(name = "my_entity")
public class MyEntity {

    private Long id;

    @Id
    @SequenceGenerator(name = "id_sequence", sequenceName = "my_id_sequence")
    @GeneratedValue(strategy = GenerationType.AUTO, generator = "id_sequence")
    public Long getId() {
        return this.id;
    }
    public void setId(Long id) {
        this.id = id;
    }

}

MyTest.java

import static org.junit.Assert.assertNotNull;

import org.hibernate.*;
import org.hibernate.cfg.*;
import org.junit.*;

public class MyTest {

    private static Configuration configuration;
    private static SessionFactory sessionFactory;

    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
        configuration = new Configuration().configure();
        sessionFactory = configuration.buildSessionFactory();
    }

    @AfterClass
    public static void tearDownAfterClass() throws Exception {
        sessionFactory.close();
    }

    private Session session;

    @Before
    public void setUp() throws Exception {
        session = sessionFactory.openSession();
    }

    @After
    public void tearDown() throws Exception {
        session.close();
    }

    @Test
    public void test() {
        Transaction transaction = session.beginTransaction();
        MyEntity entity = new MyEntity();
        session.persist(entity);
        assertNotNull(entity.getId());
        transaction.commit();
    }

}

hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration SYSTEM "classpath://org/hibernate/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
  <session-factory>
    <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
    <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>  
    <property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/mydb</property>
    <property name="hbm2ddl.auto">update</property>
    <property name="hibernate.connection.username">postgres</property>
    <property name="hibernate.temp.use_jdbc_metadata_defaults">false</property>
    <property name="hibernate.c3p0.min_size">1</property>
    <property name="hibernate.c3p0.max_size">30</property>
    <property name="hibernate.c3p0.timeout">120</property>
    <property name="hibernate.c3p0.max_statements">100</property>
    <mapping class="haba713.MyEntity" />
  </session-factory>
</hibernate-configuration>

build.gradle

plugins {
    id 'java-library'
}

repositories {
    mavenCentral()
}

ext {
    hibernateVersion = '6.0.1.Final'
}

dependencies {
    implementation 'org.postgresql:postgresql:42.3.5'
    implementation 'org.hibernate.orm:hibernate-c3p0:' + hibernateVersion
    implementation 'org.hibernate.orm:hibernate-core:' + hibernateVersion
    testImplementation 'junit:junit:4.13.2'
}

查看完整源代码here。

Answer 1

use_jdbc_metadata_defaults 配置属性必须 true 以便 Hibernate 检测正确版本的 PostgreSQL 方言。

删除此行

<property name="hibernate.temp.use_jdbc_metadata_defaults">false</property>

来自 hibernate.cfg.xml 解决了问题。

（感谢 Hibernate Zulip channel 的 Christian 解决了这个问题。）

CteInsertStrategy 只能与支持 CTE 的方言一起使用，这些方言也可以采用 UPDATE 或 DELETE 语句

CteInsertStrategy can only be used with Dialects that support CTE that can take UPDATE or DELETE statements as well

java

postgresql

hibernate

jpa

common-table-expression