所以我有以下代码：
Query query = session.createQuery("select p.festivalDay from Performance p where p.startingTimestamp < :startingTimestamp " +
"and p.endingTimestamp> :endingTimestamp" +
"and p.artist= :artist");
query.setTimestamp("beginningTimestamp", cal.getTime());
cal.set(endHour, endMonth, endDay, endHour, endMinute);
query.setTimestamp("endingTimestamp", cal.getTime());
query.setParameter("artist", a);
由于某种原因，此查询永远不会返回任何结果，艺术家是来自艺术家类的对象，节日日是节日日之一。
时间戳比较和艺术家比较似乎都失败了（我只用时间戳尝试了查询，我只用艺术家尝试了它）。（“a”显然是一个 Artist 对象）
这是我的性能模型：
@Entity
@Table(name = "T_Performance")
public class Performance{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
private Date startingTimestamp;
private Date endingTimestamp;
private Date soundCheckUur;
@ManyToOne
@Cascade(org.hibernate.annotations.CascadeType.ALL)
@JoinColumn(name = "podiumId")
private Podium podium;
@ManyToOne
@Cascade(org.hibernate.annotations.CascadeType.ALL)
@JoinColumn(name = "artistId", nullable = false)
private Artist artist;
@ManyToOne
@Cascade(org.hibernate.annotations.CascadeType.ALL)
@JoinColumn(name = "festivalDayId", nullable = false)
private FestivalDay festivalDay;
public Optreden(){
}
public Optreden(Date startingTimestamp, Date endingTimestamp, Date soundCheckHour) {
this.startingTimestamp = startingTimestamp;
this.endingTimestamp = endingTimestamp;
this.soundCheckHour = soundCheckHour;
}
public void setPodium(Podium podium) {
this.podium = podium;
}
public void setArtist(Artist artist) {
this.artist = artist;
}
public void setFestivalDay(FestivalDay festivalDay) {
this.festivalDay = festivalDay;
}
}
我的模型没有任何问题，我已经将一些名称更改为他们的英文版本，所以如果您认为您发现模型中有错误，我可能只是忘记翻译了。