morrySnow opened a new pull request, #12196:
URL: https://github.com/apache/doris/pull/12196
## Problem summary
There are some bugs in Nereids' StatsCalculator.
- Project: return child column stats directly, so its parents cannot find
column stats from project's slot.
- Aggregate: do not return column that is `Alias`, its parents cannot find
some column stats from Aggregate's slot.
- All: use `SlotReference` as key of column to stats map. So we need change
SlotReference's `equals` and `hashCode` method to just using `ExprId` as we
discussed.
## 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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