mybatis更新文章閱讀次數

<!-- 更新閱讀次數 -->
    <update id="updateReadCount" parameterType="com.sjq.cg.purchaseplan.pojo.PortalArtile">
        update portal_article
        SET read_count = IFNULL(read_count,0) + #{readCount}
        where article_id = #{articleId}
    </update>