Spring Data JPA @Query注釋，nativeQuery = true，

Question

我的@Repository有問題：

@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);
}

當我運行它時，結果是：

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

當我運行SQL它可以工作，所以對我而言，問題不在於SQL而@Query我的@Query 。

Answer 1

您的查詢以單行格式（由於erm，space的原因將多個空格縮小到一個空格）等同於

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

如果你像這樣連接一行中的所有字符串，很明顯你在WHERE子句之前缺少一個空格。

Answer 2

將SELECT z.* FROM更改為SELECT z FROM假設RekvalZamestn類映射到表rekv_z 。