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Posted to github@datafusion.apache.org by "lyne7-sc (via GitHub)" <gi...@apache.org> on 2026/08/08 13:58:06 UTC
[PR] fix: clear stale sliding aggregate state for empty RANGE frames [datafusion]
lyne7-sc opened a new pull request, #24185:
URL: https://github.com/apache/datafusion/pull/24185
## Which issue does this PR close?
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- Closes #24184.
## Rationale for this change
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Sliding aggregate window functions can return incorrect results when a bounded `RANGE` frame transitions from non-empty to empty and then back to non-empty.
The empty frame does not clear the previous accumulator state, so stale values are included in subsequent results.
## What changes are included in this PR?
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There is no need to duplicate the description in the issue here, but it is sometimes worth providing a summary of the individual changes in this PR.
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- Retract the previous frame from the accumulator when the current frame is empty.
- Add a slt covering
## Are these changes tested?
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Yes.
## Are there any user-facing changes?
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Bug fix only.
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Re: [PR] fix: clear stale sliding aggregate state for empty RANGE frames [datafusion]
Posted by "codecov-commenter (via GitHub)" <gi...@apache.org>.
codecov-commenter commented on PR #24185:
URL: https://github.com/apache/datafusion/pull/24185#issuecomment-5226533230
## [Codecov](https://app.codecov.io/gh/apache/datafusion/pull/24185?dropdown=coverage&src=pr&el=h1&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apache) Report
:x: Patch coverage is `71.42857%` with `4 lines` in your changes missing coverage. Please review.
:white_check_mark: Project coverage is 81.05%. Comparing base ([`634f0b3`](https://app.codecov.io/gh/apache/datafusion/commit/634f0b3004af274b0a3d8230710090447c53f352?dropdown=coverage&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apache)) to head ([`26e1d35`](https://app.codecov.io/gh/apache/datafusion/commit/26e1d356d6d95934a79376167035fca55eefbdd4?dropdown=coverage&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apache)).
:warning: Report is 7 commits behind head on main.
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| [...sion/physical-expr/src/window/sliding\_aggregate.rs](https://app.codecov.io/gh/apache/datafusion/pull/24185?src=pr&el=tree&filepath=datafusion%2Fphysical-expr%2Fsrc%2Fwindow%2Fsliding_aggregate.rs&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apache#diff-ZGF0YWZ1c2lvbi9waHlzaWNhbC1leHByL3NyYy93aW5kb3cvc2xpZGluZ19hZ2dyZWdhdGUucnM=) | 71.42% | [1 Missing and 3 partials :warning: ](https://app.codecov.io/gh/apache/datafusion/pull/24185?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apache) |
<details><summary>Additional details and impacted files</summary>
```diff
@@ Coverage Diff @@
## main #24185 +/- ##
==========================================
- Coverage 81.06% 81.05% -0.01%
==========================================
Files 1107 1106 -1
Lines 382191 382266 +75
Branches 382191 382266 +75
==========================================
+ Hits 309805 309863 +58
- Misses 54083 54089 +6
- Partials 18303 18314 +11
```
</details>
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Re: [PR] fix: clear stale sliding aggregate state for empty RANGE frames [datafusion]
Posted by "lyne7-sc (via GitHub)" <gi...@apache.org>.
lyne7-sc commented on PR #24185:
URL: https://github.com/apache/datafusion/pull/24185#issuecomment-5231463297
@viirya thanks for your review!
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Re: [PR] fix: clear stale sliding aggregate state for empty RANGE frames [datafusion]
Posted by "viirya (via GitHub)" <gi...@apache.org>.
viirya merged PR #24185:
URL: https://github.com/apache/datafusion/pull/24185
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