Eclipse中select中的java子查询

Question

根据EclipseLinkdocumentation，它支持select子句中的子查询（即使JPA不需要它）

当我尝试在JPA Criteria API中使用此功能时：

myCriteriaQuery
.multiselect(Arrays.asList(mySubquery, ...))
.where(...)

有一个错误：

java.lang.ClassCastException: org.eclipse.persistence.internal.jpa.querydef.SubQueryImpl cannot be cast to org.eclipse.persistence.internal.jpa.querydef.SelectionImpl

    at org.eclipse.persistence.internal.jpa.querydef.CriteriaQueryImpl.createCompoundQuery(CriteriaQueryImpl.java:511)
    at org.eclipse.persistence.internal.jpa.querydef.CriteriaQueryImpl.getDatabaseQuery(CriteriaQueryImpl.java:447)
    at org.eclipse.persistence.internal.jpa.querydef.CommonAbstractCriteriaImpl.translate(CommonAbstractCriteriaImpl.java:198)
    at org.eclipse.persistence.internal.jpa.querydef.CriteriaQueryImpl.translate(CriteriaQueryImpl.java:691)
    at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1551)

有没有提示为什么它不起作用