[GitHub] [doris] htyoung opened a new issue, #14043: [Bug] grouping sets + case when or coalesce get wrong result

[GitBox]

htyoung opened a new issue, #14043:
URL: https://github.com/apache/doris/issues/14043

   ### Search before asking
   
   - [X] I had searched in the 
[issues](https://github.com/apache/incubator-doris/issues?q=is%3Aissue) and 
found no similar issues.
   
   
   ### Version
   
   version：1.1.3-rc02
   
   ### What's Wrong?
   
   Test SQL: 
   select 
        coalesce(col1,"all") as `col1` 
        ,count(*) as `cnt`
   from (
        select null as col1
        union all
        select "a" as col1
   ) t
   group by
        grouping sets
        (
                (col1)
                ,()
        )
   ;
   
   ### What You Expected?
   
   The expected result is:
   
   col1  cnt
   all     2
   all     1
   a       1
   
   but the actual result is :
   col1  cnt
   NULL     2
   all     1
   a       1
   
   so, I test the similar sql with hive, mysql(8.0+ and 5.7+) also get the 
expected result.
   <img width="949" alt="image" 
src="https://user-images.githubusercontent.com/9734567/200318848-4cd3f10e-fbba-47ce-92bf-925b5c4c2732.png";>
   <img width="402" alt="image" 
src="https://user-images.githubusercontent.com/9734567/200319156-df0e4dec-ce61-48f7-a48f-9cfeed6c9fa5.png";>
   
![image](https://user-images.githubusercontent.com/9734567/200319236-051a80b9-d498-4890-b731-385ee45a9159.png)
   
   
   ### How to Reproduce?
   
   just run the test sql directly
   
   ### Anything Else?
   
   _No response_
   
   ### Are you willing to submit PR?
   
   - [ ] Yes I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [X] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   


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