名称 JPQL 的异常 NamedQuery

Question

当我尝试执行这个查询时，我得到了这个异常

线程“主”java.lang.IllegalArgumentException 中的异常： NamedQuery of name: odcalls.call not found.

这是我的命名查询

 @NamedQuery(name="odcalls.call", 
             query="SELECT C.count(id)," 
                        + "C.date(CalllocalTime)," 
                        + "C.hour(CalllocalTime) from ODCalls as C " 
                  + "where "
                  + " C.date(CallLocalTime) between date_sub(curdate(), Interval 12 month) and date_sub(curdate(),Interval 1 day) : Date " 
                  + " and C.FirstQueue != 0 : String " 
                  + " and C.Calltype in (1) : int " 
                  + "GROUP BY C.hour(CallLocalTime), C.date(CallLocalTime)")

这是我的 DAO

     public class ODCallsImpl implements IDao <ODCalls> {
         EntityManager em = EntitiyManagerUtil.getInstance().getEntityManager();
         private List<ODCalls> calls = new ArrayList<ODCalls>();

         @SuppressWarnings("unchecked"  @Override
         @PersistenceContext
         public List<ODCalls> getAll() {
              calls = em.createNamedQuery("odcalls.call",ODCalls.class).getResultList();
              em.close();
              return calls;
         }

Answer 1

尝试在您的实体类中声明您的@NamedQuery。

@Entity 
@Table(name="odcalls", schema= "sogedes-db")
@NamedQueries({
    @NamedQuery(name="odcalls.call", 
             query="SELECT C.count(id)," 
                        + "C.date(CalllocalTime)," 
                        + "C.hour(CalllocalTime) from ODCalls as C " 
                  + "where "
                  + " C.date(CallLocalTime) between date_sub(curdate(), Interval 12 month) and date_sub(curdate(),Interval 1 day) : Date " 
                  + " and C.FirstQueue != 0 : String " 
                  + " and C.Calltype in (1) : int " 
                  + "GROUP BY C.hour(CallLocalTime), C.date(CallLocalTime)")
}) 
    public class ODCalls {  
    @Id 
    @GeneratedValue(strategy=GenerationType.IDENTITY) 
    @Column(name="ID") 
    private String id; 
    @Column(name="CallLocalTime") 
    @Temporal(TemporalType.TIMESTAMP)   
    private Date calllocaltime; 
    @Column(name="CallType") 
    private int calltype;