我想将实体映射到另一个实体（1：1）并使用 Hibernate 在 sql 表达式中指定条件。
我有带有表位置和主题的 ERA 计划。对象与职位有 1:N 的关系。每个职位都有创建日期。我想通过休眠将最后创建的位置（来自 N 的具有相同 subject_id 的位置）作为实体映射到实体主题中。
我尝试了@Formula，但没有成功。
@Entity
public class Position {
..
}
@Entity
public class Subject {
..
@Basic(fetch = FetchType.LAZY)
@Formula("select p.* from position p inner join (select subject_id, max(position_date) maxdate from position where subject_id = 3743073 group by subject_id ) pmaxgrouped on p.subject_id = pmaxgrouped.subject_id and p.position_date = pmaxgrouped.maxdate")
private Position lastPosition;
}
Hibernate 不匹配结果 sql 查询。
SELECT *
FROM
(SELECT giposobj0_.POSOBJ_ID AS POSOBJ1_1688_,
giposobj0_.SYS_AGENDA_ID AS SYS2_1688_,
giposobj0_.SYS_INS_DATE AS SYS3_1688_,
giposobj0_.SYS_LOGIN_ID_INS AS SYS4_1688_,
giposobj0_.SYS_LOGIN_ID_UPD AS SYS5_1688_,
giposobj0_.SYS_UPD_DATE AS SYS6_1688_,
giposobj0_.SYS_LOGIN_ID_OWNER AS SYS7_1688_,
giposobj0_.SYS_ORGUNIT_ID AS SYS8_1688_,
giposobj0_.SYS_PUBKIND_LEVEL AS SYS9_1688_,
giposobj0_.POSOBJ_CODE AS POSOBJ10_1688_,
giposobj0_.POSOBJ_IMEI AS POSOBJ11_1688_,
giposobj0_.POSOBJ_LASTSTATUS AS POSOBJ12_1688_,
giposobj0_.POSOBJ_MODEL AS POSOBJ13_1688_,
giposobj0_.POSOBJ_NOTIF AS POSOBJ14_1688_,
SELECT p.*
FROM position p
INNER JOIN
(SELECT giposobj0_.posobj_id,
MAX(giposobj0_.position_date) giposobj0_.maxdate
FROM position
WHERE giposobj0_.posobj_id = 3743073
GROUP BY giposobj0_.posobj_id
) giposobj0_.pmaxgrouped
ON p.posobj_id = pmaxgrouped.posobj_id
AND p.position_date = pmaxgrouped.maxdate AS formula11_
FROM eira_gi.VS_POSOBJ giposobj0_
WHERE giposobj0_.POSOBJ_IMEI=111111111111111
);