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Posted to issues@paimon.apache.org by "QuakeWang (via GitHub)" <gi...@apache.org> on 2026/09/20 11:22:38 UTC
[PR] [python] Avoid full-window conversion for first and last aggregates [paimon]
QuakeWang opened a new pull request, #10016:
URL: https://github.com/apache/paimon/pull/10016
### Purpose
Window `first` and `last` aggregates converted the entire window to Python objects before selecting one non-null value.
Scan Arrow chunks from the requested endpoint and convert only the selected value, preserving null and value semantics.
### Tests
- Temporal suite: 76 passed, including chunk, null, nested-value, dictionary, and memory regressions.
- The memory regression fails on the previous implementation.
- Local Python allocation peak for 8,192 binary values of 1 KiB each: 8.38 MiB to about 1.6 KiB.
- Flake8, license headers, Python 3.6 syntax, and git diff --check passed.
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Re: [PR] [python] Avoid full-window conversion for first and last aggregates [paimon]
Posted by "JingsongLi (via GitHub)" <gi...@apache.org>.
JingsongLi merged PR #10016:
URL: https://github.com/apache/paimon/pull/10016
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Re: [PR] [python] Avoid full-window conversion for first and last aggregates [paimon]
Posted by "JingsongLi (via GitHub)" <gi...@apache.org>.
JingsongLi closed pull request #10016: [python] Avoid full-window conversion for first and last aggregates
URL: https://github.com/apache/paimon/pull/10016
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