starocean999 opened a new pull request, #20209:
URL: https://github.com/apache/doris/pull/20209
## Proposed changes
The top project of (T1, T2, T3) is different after reorder
we need merge **Project1** and **Project2** as **Project4** after reorder
```
T1 join T2 join T3:
Project1(a, e + f)
join(a = e)
Project2(a, b + d as e)
join(a = c)
T1(a, b)
T2(c, d)
T3(e, f)
```
after reorder:
```
T1 join T3 join T2:
Project4(a, b + d + f)
join(a = c)
Project3(a, b, f)
join(a = e)
T1(a, b)
T3(e, f)
T2(c, d)
```
## 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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