JPQL @Query - 无法准备语句异常

Question

当我尝试执行此 JPQL 时：

@Query("SELECT COUNT(v) FROM Vote v JOIN FETCH Restaurant WHERE v.restaurant.id=?1" )
Integer getVoteCountByRestaurantId(int id);

我有这个例外

nested exception is org.hibernate.exception.SQLGrammarException: could not prepare statement"

我试着改成

@Query("SELECT COUNT(v.id) FROM Vote v JOIN FETCH Restaurant WHERE v.restaurant.id=?1" )

但是异常是一样的，我哪里做错了？

Answer 1

试试这个：

@Query("SELECT COUNT(v.id) FROM Vote v JOIN v.restaurant r WHERE r.id=?1" )

JPQL @Query - Could not prepare statement exception