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  1. Hive
  2. HIVE-20501

Vectorization: Closed range fast-path for Fast Long hashset

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Won't Fix
    • None
    • None
    • None
    • None

    Description

      In scenarios where the surrogate keys are entirely contiguous, the cache can offer a fast-path for [min,max], without a further lookup in the hashtable.

      hive> select min(c_customer_sk), max(c_customer_sk), max(c_customer_sk) - min(c_customer_sk), count(1) from customer;

1       65000000        64999999        65000000

      Attachments

        1. HIVE-20501.1.patch
          5 kB
          Gopal Vijayaraghavan

        Issue Links

          is superceded by

          Sub-task - The sub-task of the issue HIVE-17040 Join elimination in the presence of FK relationship

          • Major - Major loss of function.
          • Closed

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              gopalv Gopal Vijayaraghavan
              gopalv Gopal Vijayaraghavan
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              Dates

                Created:
                Updated:
                Resolved: