获取最后一条消息使用id desc排序规则

core/src/main/resources/mapper/ImMessageMapper.xml

@@ -173,7 +173,7 @@
                                           (receivers is null ||
                                           (receivers is null ||
                                            (receivers != null and FIND_IN_SET(#{currentFkClientId}, receivers)))))
                                            (receivers != null and FIND_IN_SET(#{currentFkClientId}, receivers)))))
 
 
-        ORDER BY id DESC
+        ORDER BY im_message.id DESC
         LIMIT 1
         LIMIT 1
     </select>
     </select>