MyBatis批量更新动态sql

Posted 2021-01-02 JAGNIG

<update id="updateDataKetState">
        update ${tablespace}.IDEA_DATAKEY_STATE 
        <trim prefix="set" suffixOverrides=",">
            <trim prefix="STATENAME = case" suffix="end,">
                <foreach collection="datas"  item="data" >
                <if test="data.stateName !=null and data.stateName !=‘‘">
                    when UUID=#{data.uuid} then #{data.stateName}
                </if>
                </foreach>
            </trim>
            <trim prefix="STATEINFO = case" suffix="end,">
                <foreach collection="datas"  item="data" >
                <if test="data.stateInfo !=null">
                    when UUID=#{data.uuid} then #{data.stateInfo}
                </if>
                </foreach>
            </trim>
            <trim prefix="STATENO = case" suffix="end,">
                <foreach collection="datas"  item="data" >
                <if test="data.stateNo !=null and data.stateNo !=‘‘">
                    when UUID=#{data.uuid} then #{data.stateNo}
                </if>
                </foreach>
            </trim>
        </trim>
        where UUID in
        <foreach collection="datas" item="data" open="(" close=")" separator=",">
                #{data.uuid}
        </foreach>
    </update>

<trim>属性说明
1.prefix,suffix 表示在trim标签包裹的部分的前面或者后面添加内容
2.如果同时有prefixOverrides,suffixOverrides 表示会用prefix,suffix覆盖Overrides中的内容。
3.如果只有prefixOverrides,suffixOverrides 表示删除开头的或结尾的xxxOverides指定的内容