MySQL交叉连接查询的Hibernate异常

Question

我正在尝试执行批量删除对象Feature,它与另一个类FeatureMetadata具有鸟类ManyToOne关系.我抛出了一个SQLGrammerException.

我正在使用的hql:

String hql = "delete from Feature F where F.featuresMetadata.stateGeoId = :stateGeoId";

启用show SQL,生成以下内容:

 delete from FEATURE cross join FEATURESMETADATA featuresme1_ where STATEGEOID=?

直接在db客户端中运行SQL会产生以下异常:

 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'cross join FEATURESMETADATA featuresme1_ where stategeoid='01'' at line 1

由于生成的SQL抛出异常,我尝试将方言从MySQL5InnoDBDialect更改为MySQLInnoDBDialect,但没有变化.

有人可以帮忙吗？

Answer 1

您可能没有加入此类HQL查询.引自参考文档:

在批量HQL查询中不能指定隐式或显式的连接.子查询可以在where子句中使用,子子查询本身可以包含连接.

所以我觉得这样的事情应该有效:

delete from Feature F where F.id in 
    (select f2.id from Feature f2 where f2.featuresMetadata.stateGeoId = :stateGeoId)