wangyum commented on pull request #33702:
URL: https://github.com/apache/spark/pull/33702#issuecomment-899929979
> can we create a list of duplicate safe aggregations, and only allow it for
them? e.g.) min max
+1. This is a real case of our cluster. The view1 is a left outer join:
```sql
SELECT COALESCE((SELECT MAX(CK_DATE) FROM view1 WHERE 1=1),
CAST('2018-01-01' AS DATE));
```
Without this optimization | With this optimization
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