在Hibernate HQL中，如何筛选主表父级的联接表的结果？

Question

我有一个名为“PN”的父表，在它的实体中包含另一个与第一个表相关的实体“PNDETT”的列表。我想执行一个查询，该查询将给出带有where条件的PN列表，但它将根据where条件过滤“PNDETT”列表。我怎样才能做到这一点？

这是PN映射：

@Entity
@Table(name = "PN")
public class Pn implements java.io.Serializable {

private static final long serialVersionUID = 2556879508428749494L;

@Id
@Column(name="ID_PN", unique = true, nullable = false)
private BigDecimal idPN;

@Temporal(TemporalType.TIMESTAMP)
@Column(name="DATA_DOC")
private Date dataDoc;

@Temporal(TemporalType.TIMESTAMP)
@Column(name="DATA_COMP_BANC")
private Date dataCompBanc;

@Column(name="STATO_PN")
private String statoPN;

@Column(name="TESTO_TESTATA")
private String testoTestata;

@Temporal(TemporalType.TIMESTAMP)
@Column(name="DATA_INVIO_SAP")
private Date dataInvioSap;

@Temporal(TemporalType.TIMESTAMP)
@Column(name="DATA_INS")
private Date dataIns;

@Column(name="ID_UTENTE_AGG")
private BigDecimal idUtenteAgg;

@Temporal(TemporalType.TIMESTAMP)
@Column(name="DATA_CONTABILE")
private Date dataContabile;

@Temporal(TemporalType.TIMESTAMP)
@Column(name="DATA_REND_INTEGR")
private Date dataRendIntegr;

@Temporal(TemporalType.TIMESTAMP)
@Column(name="DATA_AGG")
private Date dataAgg;

@OneToMany(fetch = FetchType.LAZY, mappedBy = "pn")
private Set<PnDett> pnDetts = new HashSet<>(0);

@Entity
@Table(name = "PN_DETT")
public class PnDett implements java.io.Serializable {
private static final long serialVersionUID = 2556879508428749494L;

@Id
@Column(name="ID_PN_DETT", unique = true, nullable = false)
private BigDecimal idPNDett;

@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name="ID_PN", nullable=false)
private Pn pn;

@OneToOne
@JoinColumn(name="ID_DOM_TIPO_SCRITTURA")
private DomTipoScrittura domTipoScrittura;

@Column(name="TIPO_DOCUMENTO")
private String tipoDocumento;

@Column(name="ID_CALCOLO")
private String idCalcolo;


@Column(name="CONTO_COGE")
private String contoCoge;

@Column(name = "IMPORTO_AVERE")
private BigDecimal importoAvere;

@Column(name = "IMPORTO_DARE")
private BigDecimal importoDare;

@OneToOne
@JoinColumn(name="ID_UTENTE")
private Utente utente;

@Column(name = "DATA_INS")
private Date dataIns;

@Column(name = "TIPO_DETTAGLIO")
private String tipoDettaglio;

@Column(name = "SE_CANC")
private Integer seCancellato;

Answer 1

为了使过滤器工作，我们可以使用fetch，这将确保初始查询获取所有所需的数据。

select * from Pn firstNote join fetch firstNote.pnDetts pnd where firstNote.dataContabile = :param1 and pnd.seCancellato = :param2 and pnd.importoDare <> 0 or pnd.importoAvere <> 0