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Posted to issues@spark.apache.org by "zhengruifeng (Jira)" <ji...@apache.org> on 2021/02/01 05:54:00 UTC

[jira] [Created] (SPARK-34307) TakeOrderedAndProjectExec avoid shuffle if input rdd has single partition

zhengruifeng created SPARK-34307:
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             Summary: TakeOrderedAndProjectExec avoid shuffle if input rdd has single partition
                 Key: SPARK-34307
                 URL: https://issues.apache.org/jira/browse/SPARK-34307
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.2.0
            Reporter: zhengruifeng


existing impl collects local topKs to a final partition by a ShuffleExchangeExec,

when the input is small and has only one partition, this shuffle can be skipped.



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