Spring Data JPA - 该语句没有返回结果集

Question

在我的应用程序中，我有一个在父/子关系中与自身相关的模型。 帖子可以有也是帖子的父母。 我写了一个查询来删除目标帖子及其后代。 当我在 Spring 之外执行查询时，它运行良好。 但是在 Spring 中运行时，查询执行成功但抛出以下异常：

WARN  SqlExceptionHelper:144 - SQL Error: 0, SQLState: null
ERROR SqlExceptionHelper:146 - The statement did not return a result set.
ERROR [dispatcherServlet]:182 - Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.orm.jpa.JpaSystemException: could not extract ResultSet; nested exception is org.hibernate.exception.GenericJDBCException: could not extract ResultSet] with root cause
com.microsoft.sqlserver.jdbc.SQLServerException: The statement did not return a result set.

我的查询从扩展 JpaRepository 的接口运行

@Query(value = "WITH ParentTree AS (\n" +
            "  SELECT Parent.post_key,\n" +
            "    1 AS Level\n" +
            "  FROM community_post AS Parent\n" +
            "    WHERE Parent.post_key = ?1\n" +
            "    UNION ALL\n" +
            "      SELECT Child.post_key,\n" +
            "        pt.Level + 1\n" +
            "      FROM community_post AS Child\n" +
            "      INNER JOIN ParentTree AS pt\n" +
            "        ON Child.post_parent = pt.post_key\n" +
            "      WHERE Child.post_parent IS NOT NULL\n" +
            ")\n" +
            "DELETE FROM community_post\n" +
            "  WHERE post_key IN (\n" +
            "      SELECT post_key\n" +
            "      FROM ParentTree\n" +
            "  )", nativeQuery = true)
    void recursiveDelete(long targetKey);

Answer 1

我认为您也想添加 @Modifying 注释。 请参阅此处的文档。 这是因为 SQL Delete 不返回结果集。

编辑 1：

如果您熟悉 JDBC API，那么它归结为 execute（或 executeQuery）与 executeUpdate。 看起来 Spring 期望你用 @Query 注释的方法会返回一个结果集，所以当它没有时它会很失望。 相关的问题/答案在这里。

Answer 2

如果@Query缺少@Modifying注释，请添加它。