优化查询性能

@@ -26,4 +26,6 @@ public interface IInBoxDao {
     InBox selectNewUserGuideInBox(@Param("tableName")String tableName, @Param("businessType") Integer businessType, @Param("uid") Integer uid);
     
     int insertBatch(@Param("tableName") String tableName, @Param("list") List<InBox> list);
+
+    List<InBox> selectInboxsEx(@Param("tableName")String tableName,  @Param("uid") int uid);
 }

@@ -79,4 +79,13 @@
         
         
     </insert>
+
+
+    <select id="selectInboxsEx" resultMap="BaseResultMap">
+        SELECT
+        <include refid="Base_Column_List"/>
+        FROM ${tableName}  where uid = #{uid} and is_del='N'
+        order by id desc
+        limit 1
+    </select>
 </mapper>
\ No newline at end of file

@@ -418,7 +418,7 @@ public class InBoxServiceImpl implements IInBoxService {
         RedisKeyBuilder inboxKey = CacheEnum.USERS_INBOX_VO_LAST_INFO.generateKey(uid);
         InBox inbox = redisTemplate.get(inboxKey, InBox.class);
         if (null == inbox) {
-            List<InBox> inBoxes = inBoxDao.selectInboxs(getTableName(uid), null, uid, 0, 1); //查询最新一条未读消息
+            List<InBox> inBoxes = inBoxDao.selectInboxsEx(getTableName(uid), uid); //查询最新一条未读消息
             if(CollectionUtils.isNotEmpty(inBoxes)){
                 result.put("lastMessage", inBoxes.get(0).getContent());
                 result.put("createTime", inBoxes.get(0).getCreateTime());