如何使工作 SQL 查询成为 spring 数据中的本机查询

Question

我创建了一个 SQL 查询：

SELECT ORDER_NUM, STUFF2, STUFF3 FROM table1 t1 WHERE (STUFF3 = 'poor') AND NOT EXISTS (SELECT ORDER_NUM FROM table2 t2 WHERE t1.ORDER_NUM = t2.ORDER_NUM)

查询正常，我得到了想要的结果；但是，我现在正尝试在我的 spring 数据应用程序中使用此工作查询作为本机查询，使用 @Query 注释。

@Query(value = "SELECT ORDER_NUM, STUFF2, STUFF3 FROM table1 t1 WHERE (STUFF3 = ?0) AND NOT EXISTS (SELECT ORDER_NUM FROM table2 t2 WHERE t1.ORDER_NUM = t2.ORDER_NUM)", nativeQuery = true)
List<eOrder> findByStuff3(String stuff3);

我复制了完全相同的查询并将其放在我的存储库中（如上所示）但是该值绑定为 NULL，并且没有显示任何记录。是否缺少使此查询适用于我的 spring 应用程序的步骤？

Answer 1

尝试将您的查询更改为：

@Query(值="SELECT ORDER_NUM, STUFF2, STUFF3 FROM table1 t1 WHERE (STUFF3 = :stuff3) AND NOT EXISTS (SELECT ORDER_NUM FROM table2 t2 WHERE t1.ORDER_NUM = t2.ORDER_NUM)", nativeQuery = true) 列出 findByStuff3(@Param("stuff3") String stuff3);

Answer 2

通过进一步研究，我能够解决我遇到的问题。我在我的存储库中使用的本机查询确实有效，代码中有一个简单的错误，而不是 0，我用 1 替换了它并且效果很好！

旧版本：

@Query(value = "SELECT ORDER_NUM, STUFF2, STUFF3 FROM table1 t1 WHERE (STUFF3 = ?0) AND NOT EXISTS (SELECT ORDER_NUM FROM table2 t2 WHERE t1.ORDER_NUM = t2.ORDER_NUM)", nativeQuery = true)
List<eOrder> findByStuff3(String stuff3);

修改版本：

@Query(value = "SELECT ORDER_NUM, STUFF2, STUFF3 FROM table1 t1 WHERE (STUFF3 = ?1) AND NOT EXISTS (SELECT ORDER_NUM FROM table2 t2 WHERE t1.ORDER_NUM = t2.ORDER_NUM)", nativeQuery = true)
List<eOrder> findByStuff3(String stuff3);

我还遇到了另一种方法，使用 JPQL 也同样有效我能够在我的 spring 应用程序中查询运行 :

@Query(value = "SELECT t1.ORDER_NUM, t1.STUFF2, t1.STUFF3 FROM table1 t1 WHERE (t1.STUFF3 = ?0) AND NOT EXISTS (SELECT t2.ORDER_NUM FROM table2 t2 WHERE t1.ORDER_NUM = t2.ORDER_NUM)", nativeQuery = true)
List<eOrder> findByStuff3(String stuff3);

如何使工作 SQL 查询成为 spring 数据中的本机查询

How to make a working SQL query a native query in spring data

mysql

spring

spring-mvc

nativequery