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changes.mady.by.user Pengcheng Xiong

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changes.mady.by.user Lefty Leverenz

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Comment: add link to HIVE-16654 for hive.optimize.countdistinct

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  • Default Value: true
  • Added In: Hive 3.0.0 with HIVE-16654

Whether to rewrite count distinct into 2 stages, i.e., the first stage uses multiple reducers with the count distinct key and the second stage uses a single reducer without key.

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