yujun777 commented on PR #55778:
URL: https://github.com/apache/doris/pull/55778#issuecomment-3268679885
if add non-nullable, will affect optimize.
for example: for sql
```
select cast(days_add(c_datetime, interval 100 second) as date) <=>
'2020-10-10'
```
if not add non-nullable, will get c_datetime's range
```
AND[
(c_datetime#1 >= 2020-10-09 23:58:20.000),
(c_datetime#1 <= 2020-10-10 23:58:19.999),
( not seconds_add(c_datetime#1, 100) IS NULL)
]
```
if add non-nullable, can't get c_datetime's range
```
AND[
(non_nullable(seconds_add(c_datetime#1, 100)) >= 2020-10-10
00:00:00.000),
(non_nullable(seconds_add(c_datetime#1, 100)) <= 2020-10-10
23:59:59.999),
( not seconds_add(c_datetime#1, 100) IS NULL)
]
```
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