JPA + JBOSS Hibernate NamedQuery 不使用列名

Question

下面是我的 JPA 实体的 sn-p。当我在 JBOSS 中使用 Hibernate DB2 方言运行它时，生成的选择查询使用 acctYymm 而不是 ACCT_YYMM 导致 -206 异常。

@Column(name = "ACCT_YYMM")
public String getAcctYymm() {
  return acctYymm;
}

SqlSyntaxErrorException：DB2 SQL 错误：SQLCODE=-206，SQLSTATE=42703，SQLERRMC=CARTUMLRE0_.ACCTYYMM，DRIVER=3.62.56

我尝试将命名策略更改为 EJB3NamingStrategy 和 DefaultComponentSafeNamingStrategy，它们似乎都没有使用列名。我认为在我实现 EmbeddedId 并加入两个表之前不会出现这个问题。会不会有什么关联？

添加我的代码：

Car 和 Pool Entity 共享 PK 可嵌入类

@Embeddable
public class PK implements Serializable {
private String acctYymm;
private String carInit;
private String carNum;

@Column(name = "ACCT_YYMM", nullable = false, length = 4)
public String getAcctYymm() {
    return acctYymm;
}

//skipping getters and setters

@Column(name = "CAR_INIT", nullable = false, length = 4)
public String getCarInit() {
    return carInit;
}

@Column(name = "CAR_NUM", nullable = false, length = 6)
public String getCarNum() {
    return carNum;
}

}

---

@Entity
@NamedQuery(name = "Car.findAll", query = "select umler from CarEntity umler join umler.poolEntity pool where umler.pk.acctYymm = :acctYymm and umler.pk.carInit = :carInit and umler.pk.carNum = :carNum")
@Table(name = "CART_UMLER", schema = "CARSCHEMA", catalog = "")
public class CarEntity implements Serializable{

@EmbeddedId
private PK pk = null;

public PK getPk() {
    return pk;
}

public void setPk(PK pk) {
    this.pk = pk;
}


@OneToOne
@PrimaryKeyJoinColumns({
        @PrimaryKeyJoinColumn(name="ACCT_YYMM", referencedColumnName="ACCT_YYMM"),
        @PrimaryKeyJoinColumn(name="CAR_INIT", referencedColumnName="CAR_INIT"),
        @PrimaryKeyJoinColumn(name="CAR_NUM", referencedColumnName="CAR_NUM")
})
private PoolEntity poolEntity;

private String carTyp;

@Basic
@Column(name = "CAR_TYP", nullable = false, length = 1)
public String getCarTyp() {
    return carTyp;
}

//skipping getters and setters
}

---

@Entity
@Table(name = "POOL", schema = "CARSCHEMA", catalog = "")
public class PoolEntity implements Serializable{

@EmbeddedId
private PK pk = null;

public PK getPk() {
    return pk;
}

public void setPk(PK pk) {
    this.pk = pk;
}

private String poolCd;

@Basic
@Column(name = "POOL_CD", nullable = false, length = 7)
public String getPoolCd() {
    return poolCd;
}

public void setPoolCd(String poolCd) {
    this.poolCd = poolCd;
}

}

Answer 1

如果您仔细查看您的映射，您会发现您混合了属性和基于字段的访问。

你需要将@EmbeddedId注解从字段移到属性：

private PK pk = null;

@EmbeddedId
public PK getPk() {
    return pk;
}

这适用于 PoolEntity poolEntity; 和 PoolEntity pk 属性。

您需要对这些映射保持一致，否则，Hibernate 将找不到它们。