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  1. IMPALA
  2. IMPALA-6822

Provide a query option to not shuffle on distinct exprs

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    • Epic Color:
      ghx-label-3

      Description

      After IMPALA-4794, in a distinct aggregation, data will be shuffled on grouping exprs and distinct expr. It works well if the NDV of grouping exprs is low, but is an regression otherwise. We should provide a query operation to disable IMPALA-4794 and probably look to do smarter planning in the future.

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            • Assignee:
              tianyiwang Tianyi Wang
              Reporter:
              tianyiwang Tianyi Wang

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