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  1. Spark
  2. SPARK-11150

Dynamic partition pruning

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      Implements dynamic partition pruning by adding a dynamic-partition-pruning filter if there is a partitioned table and a filter on the dimension table. The filter is then planned using a heuristic approach:

      1. As a broadcast relation if it is a broadcast hash join. The broadcast relation will then be transformed into a reused broadcast exchange by the ReuseExchange rule; or
      2. As a subquery duplicate if the estimated benefit of partition table scan being saved is greater than the estimated cost of the extra scan of the duplicated subquery; otherwise
      3. As a bypassed condition (true).

       Below shows a basic example of DPP.

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              maryannxue Wei Xue
              ynaguib Younes
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