jackwener opened a new pull request, #19441:
URL: https://github.com/apache/doris/pull/19441
# Proposed changes
Issue Number: close #xxx
## Problem summary
We shouldn't push top Project of JoinCluster in PushdownProjectThroughJoin
like
```
* Project (id + 1) if this project is top project of Join Cluster
* |
* Join
* / \
* Join Join
* / ....
* Join
```
we just pushdown project inside Join Cluster
## Checklist(Required)
* [ ] Does it affect the original behavior
* [ ] Has unit tests been added
* [ ] Has document been added or modified
* [ ] Does it need to update dependencies
* [ ] Is this PR support rollback (If NO, please explain WHY)
## 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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