JPA: Errors in named query

Question

I get the exception org.hibernate.HibernateException: Errors in named queries: ElaborazionePagamentiMaggioriOneri.estrai but the named query looks correct to me. I also get

org.hibernate.hql.ast.QuerySyntaxException: ElaborazionePagamentiMaggioriOneri is not mapped [FROM ElaborazionePagamentiMaggioriOneri e  WHERE e.dataInizioLancio IS NULL AND e.dataFineLancio IS NULL AND e.distinta IS NULL]

My entity is the following:

@Entity(name="ELABORAZIONE_PAGAMENTI")
@Table(name="ELABORAZIONE_PAGAMENTI")
@NamedQuery(name="ElaborazionePagamentiMaggioriOneri.estrai", 
query="FROM ElaborazionePagamentiMaggioriOneri e  WHERE e.dataInizioLancio IS NULL AND e.dataFineLancio IS NULL AND e.distinta IS NULL")
public class ElaborazionePagamentiMaggioriOneri {
    @Id
    @GeneratedValue
    @Column(name="ID_ELABORAZIONE")
    private long idElaborazione;

    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="ID_INTERVALLO")
    private Intervallo intervallo;

    @Column(name="IMPORTO_MINIMO")
    private BigDecimal importoMinimo;

    @Column(name="IMPORTO_MASSIMO")
    private BigDecimal importoMassimo;

    @Column(name="LIMITE_DISPOSIZIONI")
    private Long limiteDisposizioni;

    @Column(name="DATA_INIZIO_LANCIO")
    private Calendar dataInizioLancio;

    @Column(name="DATA_FINE_LANCIO")
    private Calendar dataFineLancio;

    @OneToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="ID_DISTINTA")
    private DistintaMaggioriOneri distinta;

What is the origin of the error? I have double checked the JPQL syntax.

Answer 1

Entity name used with @Entity and the name of the entity you are using inside Select query should be same, if you are not using entity name with @Entity then class name should be used with the Select query. Check this properly.

Answer 2

The problem is that if you put the annotation @Entity(name="ELABORAZIONE_PAGAMENTI") you set the name of the entity to be ELABORAZIONE_PAGAMENTI. There are two solutions:

• modify the named query into FROM ELABORAZIONE_PAGAMENTI e WHERE e.dataInizioLancio IS NULL AND e.dataFineLancio IS NULL AND e.distinta IS NULL
• modify the @Entity annotation by removing the name property

Answer 3

You are missing SELECT in your query.

query="SELECT e FROM ElaborazionePagamentiMaggioriOneri e  WHERE

Answer 4

In addition to missing SELECT, the "is not mapped" error is probably because you don't have the class registered in persistence.xml.