HQL子查询查询选择

Question

当我执行此查询时，我总是收到太多列错误。

SELECT o FROM Overlay o WHERE ( :coordinate ) IN ELEMENTS(o.blocksCoordinates)

如果我在sql中执行此操作，则可以：

Select * from Overlay overlay0_ where (0,0) in (select x, y from ...

坐标是具有x和y值的简单嵌入式实体。

@ElementCollection
private Set<Coordinate> blocksCoordinates = new HashSet<Coordinate>();

我的协调中心实体：

@Embeddable
public class Coordinate implements Serializable {
    private static final long serialVersionUID = -5866341829302555966L;

    protected int x;
    protected int y;

我究竟做错了什么？

Answer 1

反过来尝试：

select o from Overlay o left outer join o.blocksCoordinates as c where c = :coordinate

或使用with关键字：

select o from Overlay o join o.blocksCoordinates as c with c = :coordinate

使用该查询应返回在c =坐标上成功进行连接的所有Overlay。

编辑：或者，尝试使用x和y值：

select o from Overlay o join o.blocksCoordinates as c with c.x = :x and c.y = :y