src/main/resources/mapper/MessageMapper.xml

@@ -11,6 +11,15 @@
    </select>

    <!-- 根据userId获取最大id和条数 -->
    <select id="getUnreadMessageCount" parameterType="Long" resultType="map" databaseId="postgresql">
        select NVL(count(*), 0)        count,
               NVL(max(message_id), 0) maxId
        FROM sys_message
        WHERE receive_user_id = #{userId}
          and is_read = '0'
    </select>

    <!-- 根据userId获取最大id和条数 -->
    <select id="getUnreadMessageCount" parameterType="Long" resultType="map" databaseId="kingbasees">
        select NVL(count(*), 0)        count,
               NVL(max(message_id), 0) maxId