Hibernate从hql查询创建多个查询

Question

我有一种奇怪的效果，即在执行特定的hql查询时，休眠会触发多个查询。 目前，我使用hsqldb 1.8进行开发。

@NamedQuery(name=PointOfInterestLabel.FIND_BY_FIGURE, query="Select pl FROM PointOfInterestLabel pl INNER JOIN pl.poi p WHERE p.figure = :figure")

控制台输出：

Hibernate: select pointofint0_.id as id5_, pointofint0_.labelId as labelId5_, pointofint0_.locale as locale5_, pointofint0_.pointOfInterestId as pointOfI4_5_ from PointOfInterestLabel pointofint0_ inner join PointOfInterest pointofint1_ on pointofint0_.pointOfInterestId=pointofint1_.id where pointofint1_.figureId=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?
Hibernate: select pointofint0_.id as id1_1_, pointofint0_.figureId as figureId1_1_, pointofint0_.percentageX as percenta2_1_1_, pointofint0_.percentageY as percenta3_1_1_, pointofint0_.x as x1_1_, pointofint0_.y as y1_1_, figure1_.id as id2_0_, figure1_.fileName as fileName2_0_, figure1_.height as height2_0_, figure1_.legende as legende2_0_, figure1_.originalFileHash as original5_2_0_, figure1_.svgHash as svgHash2_0_, figure1_.width as width2_0_ from PointOfInterest pointofint0_ inner join Figure figure1_ on pointofint0_.figureId=figure1_.id where pointofint0_.id=?

我想选择所有PointOfInterestLabel到给定的数字。 因此，两个表之间的联接就足够了。

数字：

    public class Figure {
    @OneToMany(mappedBy = "figure")
    private List<PointOfInterest> pois = new ArrayList<PointOfInterest>();

兴趣点：

public class PointOfInterest extends GenericEntity {
    @ManyToOne
    @JoinColumn(name="figureId", nullable=false)
    private Figure figure;

    @OneToMany(mappedBy="poi")
    private List<PointOfInterestLabel> labels = new ArrayList<PointOfInterestLabel>();

PointOfInterestLabel：

public class PointOfInterestLabel extends GenericEntity {
    private static final long serialVersionUID = 969499193403830375L;

    @Id
    @GeneratedValue
    private long id;

    @ManyToOne
    @JoinColumn(name="pointOfInterestId")
    private PointOfInterest poi;

那我在做什么错？ 我只希望通过联接将所有PointOfInterestLabel都获得给定的数字。

问候m

Answer 1

我有一个类似的问题。 不确定是否适合您，但无论如何：

Select distinct pl FROM PointOfInterestLabel pl INNER JOIN FETCH pl.poi p WHERE p.figure = :figure

Answer 2

我认为造成这种情况的原因是渴望加入协会。 默认情况下，会急切地获取所有ToOne关联。 您可以通过指定fetchType覆盖它。 如下更改PointOfInterestLabel类-注意fetch属性。

public class PointOfInterestLabel extends GenericEntity {
    private static final long serialVersionUID = 969499193403830375L;

    @Id
    @GeneratedValue
    private long id;

    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="pointOfInterestId")
    private PointOfInterest poi;

Answer 3

您有两个OneToManyAssociations：一个是从Figure到POI，另一个是在POI和POIL之间。 这些都是延迟加载的，因为如果您不指定其他任何内容，则这是这些的默认配置。

您还在查询要从所有3个对应表中选择数据的查询：

Select pl FROM PointOfInterestLabel pl INNER JOIN pl.poi p WHERE p.figure = ?

“ FROM PointOfInteresetLabel”在POIL表中查找“ pl.poi”在POI表中查找“ p.figure”在图形表中查找

如果您未指定即时获取（在关联配置中或在HQL查询中），则会使用N + 1个Select操作加载它们，因此会生成许多SQL查询

尝试：

SELECT pointOfInterest FROM Figure AS figure INNER JOIN FETCH figure.pois AS pointOfInterest INNER JOIN FETCH pointOfInterest.labels AS labels WHERE figure=:figure