我想作为@Vlad Mihalcea博客 https://vladmihalcea.com/how-to-customize-the-jdbc-batch-size-for-each-persistence-context-with-hibernate/JPA定制JDBC批处理大小不工作
EntityManager entityManager = entityManagerFactory.createEntityManager();
entityManager.getTransaction().begin();
entityManager.unwrap(Session.class).setJdbcBatchSize(5);
for(int i = 0;i<10;i++){
Charge c = new Charge();
c.setAccountNumber("acct"+i);
entityManager.persist(c);
}
entityManager.getTransaction().commit();
<bean id="entityManagerFactoryDefault"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="charg" />
<property name="persistenceUnitName" value="MaterializedView" />
<property name="persistenceXmlLocation" value="classpath*:META-INF/jpa-persistence.xml" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="generateDdl" value="false" />
<property name="showSql" value="true"/>
<property name="database">
<util:constant static-field="org.springframework.orm.jpa.vendor.Database.ORACLE" />
</property>
</bean>
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.default_batch_fetch_size">500</prop>
<prop key="hibernate.jdbc.fetch_size">10</prop>
<prop key="hibernate.jdbc.batch_versioned_data">true</prop>
<prop key="hibernate.order_updates">true</prop>
<prop key="hibernate.order_inserts">true</prop>
<prop key="hibernate.jdbc.batch_size">30</prop>
<prop key="hibernate.id.new_generator_mappings">false</prop>
</props>
</property>
</bean>
提到的配置JDBC批处理大小,但它触发10个插入查询。
我得到这个查询 休眠:从双 休眠选择charge.nextval:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值 休眠(?,?):插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值 (?,?)休眠:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值 休眠(?,?):插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值 休眠(?,?):插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值 休眠(?,?):插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(?,?) Hibernate:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(?,?) Hibernate:插入CHARGE(ACCOUNT NUMBER CHARGE_ID)值(,) 休眠:??插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(,) 休眠:??插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(,)
我使用休眠5.2? .10。最终版本和序列作为战略。 有人可以纠正我,如果我的代码错了