morrySnow opened a new pull request, #9589:
URL: https://github.com/apache/incubator-doris/pull/9589
…some slot cannot changed to nullable
# Proposed changes
Issue Number: close #9588
## Problem Summary:
Could reproduced by:
```sql
create table test.tbl1
(k1 int, k2 int, v1 int)
distributed by hash(k1)
properties("replication_num" = "1");
explain select * from test.tbl1 t1 where (select count(*) from test.tbl1 t2
where t1.k1 = t2.k1) > 0;
```
## Checklist(Required)
1. Does it affect the original behavior: (No)
2. Has unit tests been added: (Yes)
3. Has document been added or modified: (No Need)
4. Does it need to update dependencies: (No)
5. Are there any changes that cannot be rolled back: (No)
## Further comments
If this is a relatively large or complex change, kick off the discussion at
[d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you
chose the solution you did and what alternatives you considered, etc...
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