有没有办法知道物化视图刷新完成需要多长时间？

Question

我通过 dblink 为表创建了一些物化视图。第一次创建物化视图时，由于数据巨大，花费了近 20 多分钟的时间。所以，我想知道，为了进一步刷新这些物化视图，刷新需要多长时间才能完成。我尝试在网络上搜索，大多数答案都是为了获取最后刷新时间。

Answer 1

select last_refresh_date,
       last_refresh_end_time,
        extract ( day from diff ) days,
        extract ( hour from diff ) hours,
        extract ( minute from diff ) minutes,
        extract ( second from diff ) seconds
from (
    SELECT mview_name,
           last_refresh_date,
           last_refresh_end_time,
           numtodsinterval(last_refresh_end_time - last_refresh_date, 'day') as diff
    FROM user_mviews
);

LAST_REFRESH_DATE	LAST_REFRESH_END_TIME	天数	小时	分钟	秒
2024-07-22 13:15:00	2024-07-22 13:15:21	0	0	0	21
2024-07-22 13:15:00	2024-07-22 13:15:27	0	0	0	27
2024-07-22 13:15:00	2024-07-22 13:15:00	0	0	0	0
2024-07-24 20:28:54	2024-07-24 20:28:54	0	0	0	0
2024-07-25 02:42:45	2024-07-25 02:42:49	0	0	0	4
2024-07-22 13:15:00	2024-07-22 13:15:01	0	0	0	1
2024-07-22 13:15:00	2024-07-22 13:29:38	0	0	14	38
2024-07-22 13:15:00	2024-07-22 13:28:27	0	0	13	27
2024-04-08 01:50:53	2024-04-08 01:50:53	0	0	0	0
2024-04-08 01:56:10	2024-04-08 01:56:10	0	0	0	0