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我有一个命名的本机查询，看起来像这样：

@NamedNativeQuery(name = "deleteRecipes", query = "DELETE FROM RECIPE WHERE rcp_acc_identifier IN (?1)")

这些是配方表的重要部分：

                                              Table "public.recipe"
         Column          |            Type             |                        Modifiers                        
-------------------------+-----------------------------+---------------------------------------------------------
 rcp_pf_id_photodata     | bigint                      | 
 rcp_pf_id_thumbnaildata | bigint                      | 
Indexes:
    "fk_rcp_pf_id_photodata_idx" btree (rcp_pf_id_photodata)
    "fk_rcp_pf_id_thumbnaildata_idx" btree (rcp_pf_id_thumbnaildata)
Foreign-key constraints:
    "fk_rcp_pf_id_photodata" FOREIGN KEY (rcp_pf_id_photodata) REFERENCES persistable_file(pf_id) ON DELETE CASCADE
    "fk_rcp_pf_id_thumbnaildata" FOREIGN KEY (rcp_pf_id_thumbnaildata) REFERENCES persistable_file(pf_id) ON DELETE CASCADE

当我执行上面的查询时，配方将被删除，但不会删除persistable_file 中的数据。为什么会这样？附加信息：我在创建数据库时没有设置 ON DELETE CASCADE。我稍后通过首先从上面删除两个约束来添加它，然后我使用附加的 ON DELETE CASCADE 指令再次添加了约束。这可能是为什么数据没有被删除的问题吗？

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