Time_bucket_gapfill如何定义一周的范围

Question

我的timescaledb有一个time_bucket_gapfill问题。设置初始值时，我想查询这一天之后7天的数据，但是timescaledb总是从星期一开始计数。如何自定义7天的时间范围？

这是我的代码

   SELECT 
time_bucket_gapfill('7 day', time,
                   start =>'2016-01-02',finish => '2016-12-31') AS "day", 
locf(sum(pub_flg)) as pub_flg
    FROM public.tb_lp_media_pub
    where media_id=3236
    GROUP BY "day"
    ORDER BY "day" asc;

This is my result

This is real weeks

This is the result of adding the where condition

This is my table structure with some data