ashb commented on a change in pull request #15397:
URL: https://github.com/apache/airflow/pull/15397#discussion_r644668430
##########
File path: airflow/www/views.py
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@@ -2298,8 +2298,10 @@ def duration(self, session=None):
else:
base_date = dag.get_latest_execution_date() or timezone.utcnow()
- dates = dag.date_range(base_date, num=-abs(num_runs))
- min_date = dates[0] if dates else timezone.utc_epoch()
+ min_date = next(
+ dag.time_table.iter_next_n(base_date, 1),
+ timezone.utc_epoch(),
+ )
Review comment:
I think this needs to be something like:
```
SELECT execution_date FROM dag_run WHERE execution_date <= $base_date ORDER
BY execution_date DESC OFFSET ? LIMIT 1
```
with `abs(num_runs)` as the offset.
I _think_
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