JPA/Hibernate原生查询无法识别EmbeddedId参数

Question

我正在使用Hibernate/JPA来执行本机MySql查询。我想获得柜台的价值。

例如，下面的查询崩溃：

"SELECT sizeList FROM myCounter WHERE myColA=?1 AND myColB=?2 AND LIMIT 1" 

错误：

java.lang.IllegalArgumentException: Parameter with that name [1] did not exist 

来源：

方法：

@Override 
public Long getSizeList(String myColA, String myColB) { 
    Query q = em.createNativeQuery("MyCounter.getSizeList"); 
    q.setParameter(1, myColA); 
    q.setParameter(2, myColB); 
    return (Long) q.getSingleResult(); 
} 

实体：

@Entity 
@Table(name = "myCounter") 
@XmlRootElement 
@NamedNativeQueries({ 
@NamedNativeQuery(name = "MyCounter.getSizeList", query = "SELECT sizeList FROM myCounter WHERE myColA=?1 AND myColB=?2 AND LIMIT 1", resultClass = MyCounter.class)}) 
public class MyCounter implements Serializable { 

private static final long serialVersionUID = 1L; 
@EmbeddedId 
protected MyCounterPK myCounterPK; 
@Column(name = "sizeList") 
private BigInteger sizeList; 

public PostListCounterPTTESLTTT() { 
} 

... 

public BigInteger getSizeList() { 
    return sizeList; 
} 

} 

嵌入式：

@Embeddable 
public class MyCounterPK implements Serializable { 
@Basic(optional = false) 
@NotNull 
@Size(min = 1, max = 255) 
@Column(name = "myColA") 
private String myColA; 
@Basic(optional = false) 
@NotNull 
@Size(min = 1, max = 50) 
@Column(name = "myColB") 
private String myColB; 

public MyCounterPK() { 
} 

... 

} 

有谁知道如何在这种情况下使用的setParameter（）？

我尝试：

//case 1: 
"SELECT sizeList FROM myCounter WHERE myColA=?1 AND myColB=?2 AND LIMIT 1" 
q.setParameter(1, myColA); //the same error 

//case 2: 
"SELECT sizeList FROM myCounter WHERE myColA=?1 AND myColB=?2 AND LIMIT 1" 
q.setParameter("1", myColA); //the same error 

//case 3: 
"SELECT sizeList FROM myCounter WHERE myColA=:myColA AND myColB=:myColB AND LIMIT 1" 
q.setParameter("myColA", myColA); //the same error 

Answer 1

而不是

Query q = em.createNativeQuery("MyCounter.getSizeList"); 

试试这个：

Query q = em.createNamedQuery("MyCounter.getSizeList");