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  1. Hive
  2. HIVE-24037 Parallelize hash table constructions in map joins
  3. HIVE-25583

Support parallel load for HastTables - Interfaces

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    Description

      Support parallel load for HastTables - Interfaces

      • Introducing VectorMapJoinFastHashTableContainerBase class that implements VectorMapJoinHashTable
      • Each VectorMapJoinFastStringHashMapContainer is a singleton that contains an array of HashTables (1 or more)
      • VectorMapJoinFastTableContainer now initializes VectorMapJoinFastHashTableContainers instead of HTs directly

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          causes

          Sub-task - The sub-task of the issue HIVE-27269 VectorizedMapJoin returns wrong result for TPC-DS query 97

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          links to

          Web Link GitHub Pull Request #2999

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              pgaref Panagiotis Garefalakis
              rameshkumar Ramesh Kumar Thangarajan
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