HappenLee opened a new pull request, #32377:
URL: https://github.com/apache/doris/pull/32377
## Proposed changes
Fix p0 case
Before:
```
select * from join_null_value_left_table a join join_null_value_right_table
b on a.k2<=> b.k2
and a.k4<=>NULL and b.k4 is not NULL order by a.k1,b.k1
empty result
```
After:
```
select * from join_null_value_left_table a join join_null_value_right_table
b on a.k2<=> b.k2
and a.k4<=>NULL and b.k4 is not NULL order by a.k1,b.k1
1 \N null \N \N 8.9 3 \N null 2019-09-09 \N 8.9
```
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