EmmyMiao87 opened a new pull request #5569:
URL: https://github.com/apache/incubator-doris/pull/5569
## Proposed changes
The underlying sort node of the window function can also be colocate sorted.
When the data distribution of the child fragment is less than or equal
to the sorting column,
the sorting node can perform local sorting.
This can reduce unnecessary data transmission, thereby improving query
performance.
For example:
The table schema: k1, k2, k3, k4
The table is distrubited by: k1, k2
Query: select k1, sum(k2) over(partition by k1 order by k2) from
test_colocate;
The colocate plan is following:
| PLAN FRAGMENT 1 |
| DATA PARTITION: k1, k2 |
| |
| 2:ANALYTIC NODE |
| | |
| 1:SORT NODE |
| | order by: `k1`, `k2` |
| | |
| 0:OlapScanNode |
| TABLE: test_colocate |
## Types of changes
What types of changes does your code introduce to Doris?
_Put an `x` in the boxes that apply_
- [ ] Bugfix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Documentation Update (if none of the other choices apply)
- [ ] Code refactor (Modify the code structure, format the code, etc...)
## Checklist
_Put an `x` in the boxes that apply. You can also fill these out after
creating the PR. If you're unsure about any of them, don't hesitate to ask.
We're here to help! This is simply a reminder of what we are going to look for
before merging your code._
- [x] I have created an issue on (Fix #ISSUE) and described the bug/feature
there in detail
- [x] Compiling and unit tests pass locally with my changes
- [x] I have added tests that prove my fix is effective or that my feature
works
- [ ] If these changes need document changes, I have updated the document
- [ ] Any dependent changes have been merged
## Further comments
Document and more unit test will be added later.
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