2月7日，指定执行人收到消息优化

src/main/resources/cashMapper/MessageMapper.xml

@@ -38,8 +38,9 @@
                     #{item}
                 </foreach>
             </if>
+            <!-- 只有当 executor 不为 null 时才添加过滤条件 -->
             <if test="executor != null">
-                AND m.executor = #{executor}
+                AND (m.executor = #{executor} OR m.executor IS NULL)
             </if>
         </where>
         ORDER BY m.cz_time DESC