[SPARK-34775][SQL] Push down limit through window when partitionSpec is not empty #31926
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Will add new Unit test later |
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cc @wangyum |
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Can one of the admins verify this patch? |
wangyum
requested changes
Mar 30, 2021
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It seems Impala supports this optimization: |
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We're closing this PR because it hasn't been updated in a while. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable. |
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This is a followup from #31691. Push down limit through Window when the partitionSpec of all window functions is not empty and the same order is used.
What changes were proposed in this pull request?
Push down limit through Window when the partitionSpec of all window functions is not empty
Why are the changes needed?
Improve query performance.
Does this PR introduce any user-facing change?
No.
How was this patch tested?
Unit test.