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[SPARK-37682][SQL]Apply 'merged column' and 'bit vector' in RewriteDistinctAggregates #34953

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Commits on Dec 22, 2021

  1. apply 'merged column' and 'bit vector' tricks in RewriteDistinctAggre…

    …gates
    
    Co-authored-by: Yizhen Fan <[email protected]>
    Yang Liu and SparksFyz committed Dec 22, 2021
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