Mybatis动态update

<update id="updateOne" parameterType="com.inspur.search.data.EntityRelation"> 

    UPDATE ENTITY_RELATION 

        <trim prefix="set" suffixOverrides=","> 

        <if test="srcId!=null">SRC_ID=#{srcId},</if> 

        <if test="srcType!=null">SRC_TYPE=#{srcType},</if> 

        <if test="destId!=null">DEST_ID=#{destId},</if> 

        <if test="destType!=null">DEST_TYPE=#{destType},</if> 

        <if test="relType!=null">REL_TYPE=#{relType},</if> 

        <if test="status!=null">STATUS=#{status},</if> 

        <if test="snId!=null">SN_ID=#{snId},</if> 

    </trim> 

    WHERE id=#{id}

</update>

trim标签内

prefix sql语句加前缀

suffix 加后缀

prefixOverrides 去除多余的前缀

suffixOverrides 去除多余的后缀