morrySnow opened a new pull request, #11717:
URL: https://github.com/apache/doris/pull/11717
# Proposed changes
When we do write current plan with its child. Currently, nereids memo do
nothing indeed.
This PR fix this situation by add a predicate in rewrite that only replaced
target group and set newGroupExpressionGenerated to false when target is null
or target is same with existed group expression's group.
The rewrite situation is like this:
```
Original:
Project(outside)
|---Project(inside)
|---UnboundRelation
After rewrite:
Project(inside)
|---UnboundRelation
```
## Problem summary
Describe your changes.
## Checklist(Required)
1. Does it affect the original behavior:
- [ ] Yes
- [ ] No
- [ ] I don't know
2. Has unit tests been added:
- [ ] Yes
- [ ] No
- [ ] No Need
3. Has document been added or modified:
- [ ] Yes
- [ ] No
- [ ] No Need
4. Does it need to update dependencies:
- [ ] Yes
- [ ] No
5. 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
[[email protected]](mailto:[email protected]) by explaining why you
chose the solution you did and what alternatives you considered, etc...
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