Spring 数据 JPA @Query 注释，nativeQuery = true，

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 它工作时，所以对我来说问题不在于 SQL 而在于我的 @Query.

Answer 1

将 SELECT z.* FROM 更改为 SELECT z FROM 假设 RekvalZamestn class 映射到 table rekv_z.

Answer 2

您的查询，采用单行格式（将多个 space 压缩为一个 space，原因是 space），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

如果像这样将所有字符串连接在一行中，很明显您在 WHERE 子句之前缺少 space。

Spring 数据 JPA @Query 注释，nativeQuery = true，

Spring Data JPA @Query annotation, nativeQuery = true,

java

spring-data-jpa