cambyzju opened a new pull request, #11798:
URL: https://github.com/apache/doris/pull/11798
# Proposed changes
Issue Number: close #7288
## Problem summary
The key points to reproduce the problem:
1. create table with string NOT NULL column;
2. call left join with group_concat;
The reason is because:
1. aggregate function framework pick combined null function by arguments
type;
2. as the input argument is NOT NULL, so the origin group_concat is selected;
3. as a result, we need to consider insert_result_into with input column =
ColumnNullabe(ColumnString);
## Checklist(Required)
1. Does it affect the original behavior:
- [ ] Yes
- [ ] No
- [ ] I don't know
4. Has unit tests been added:
- [ ] Yes
- [ ] No
- [ ] No Need
5. Has document been added or modified:
- [ ] Yes
- [ ] No
- [ ] No Need
6. Does it need to update dependencies:
- [ ] Yes
- [ ] No
7. Are there any changes that cannot be rolled back:
- [ ] Yes (If Yes, please explain WHY)
- [ ] 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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