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。
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 |