Hibernate EntityManager SecondaryTable

Hibernate　Annotationで一つのクラスで二つのテーブルにマッピングする。
Customer.java
CustomerTest.java

テーブル
customer
customerdetail

Customer.java

package com.test;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SecondaryTable;
import javax.persistence.Table;
import javax.persistence.TableGenerator;

@Entity
@Table(name = "Customer")
@SecondaryTable(name = "CustomerDetail")
public class Customer {
    private long customerId;
    private String customerName;
    private String customerAddress;
    private int creditScore;
    private int rewardPoints;

    @Id
    @TableGenerator(name = "customerid", table = "emppktbl", pkColumnName = "empkey", pkColumnValue = "customervalue", allocationSize = 1)
    @GeneratedValue(strategy = GenerationType.TABLE, generator = "customerid")
    @Column(name = "CustomerId")
    public long getCustomerId() {
        return customerId;
    }

    public void setCustomerId(long customerId) {
        this.customerId = customerId;
    }

    public String getCustomerName() {
        return customerName;
    }

    public void setCustomerName(String customerName) {
        this.customerName = customerName;
    }

    @Column(table = "CustomerDetail")
    public String getCustomerAddress() {
        return customerAddress;
    }

    public void setCustomerAddress(String customerAddress) {
        this.customerAddress = customerAddress;
    }

    @Column(table = "CustomerDetail")
    public int getCreditScore() {
        return creditScore;
    }

    public void setCreditScore(int creditScore) {
        this.creditScore = creditScore;
    }

    @Column(table = "CustomerDetail")
    public int getRewardPoints() {
        return rewardPoints;
    }

    public void setRewardPoints(int rewardPoints) {
        this.rewardPoints = rewardPoints;
    }
}

CustomerTest.java

package com.test;

import static org.junit.Assert.*;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

public class CustomerTest {

    static EntityManagerFactory entityManagerFactory;

    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
        entityManagerFactory = Persistence
                .createEntityManagerFactory("org.hibernate.tutorial.jpa");
    }

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

    @Before
    public void setUp() throws Exception {
    }

    @After
    public void tearDown() throws Exception {
    }

    @Test
    public void test() {
        EntityManager entityManager = entityManagerFactory
                .createEntityManager();
        entityManager.getTransaction().begin();

        try {
            Customer customer1 = new Customer();
            customer1.setCustomerName("customer1");
            customer1.setCustomerAddress("newyork");
            customer1.setCreditScore(12345);
            customer1.setRewardPoints(100);
            entityManager.persist(customer1);

            Customer customer2 = new Customer();
            customer2.setCustomerName("customer2");
            customer2.setCustomerAddress("tokyo");
            customer2.setCreditScore(67890);
            customer2.setRewardPoints(200);
            entityManager.persist(customer2);

            entityManager.getTransaction().commit();
        }
        catch (Exception e) {
            entityManager.getTransaction().rollback();
        }
    }
}

Customer.sql

create table Customer 
(
    CustomerId int8 not null, 
    customerName varchar(255), 
    primary key (CustomerId)
)

CustomerDetail.sql

create table CustomerDetail 
(
    creditScore int4, 
    customerAddress varchar(255), 
    rewardPoints int4, 
    CustomerId int8 not null, 
    primary key (CustomerId)
)