Question

我的@Repository：

有问题

@Repository
public interface RekvZmRepository extends CrudRepository<RekvalZamestn, RekvalZamestnPk> {
@Query(value = "SELECT z.* FROM rek_zm d INNER JOIN proj_a a ON d.id = a.prj_idcislo"
  + "                                   INNER JOIN proj_e e ON a.id = e.id"
  + "                                   INNER JOIN rekv_z z ON d.id = z.id"
  + "WHERE  d.id = ?1 AND a.id = ?2 AND e.id = ?3", nativeQuery = true)
public List<RekvalZamestn> getRekvOsOnDoh(Long dhzmrk, Long prj, Long prje);
}

当我运行它时，结果是：

org.springframework.dao.InvalidDataAccessResourceUsageException: could not
extract ResultSet; SQL [n/a]; nested exception is
org.hibernate.exception.SQLGrammarException: could not extract ResultSet

当我运行SQL时，它会起作用，所以对我来说，问题不在于SQL，而在于@Query。

Answer 1

您的查询，以单行格式（由于，erm，空格的原因将多个空格缩小到一个空格）等同于

SELECT z.* FROM rek_zm d INNER JOIN proj_a a ON d.id = a.prj_idcislo INNER JOIN proj_e e ON a.id = e.id INNER JOIN rekv_z z ON d.id = z.idWHERE  d.id = ?1 AND a.id = ?2 AND e.id = ?3

如果你像这样连接一行中的所有字符串，很明显你在WHERE子句之前缺少一个空格。

Answer 2

假设SELECT z.* FROM类映射到表SELECT z FROM，

将RekvalZamestn更改为rekv_z。

Spring Data JPA @Query注释，nativeQuery = true，

2 个答案: