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  1. Hive
  2. HIVE-22731 MJ probe decode with row-level filtering
  3. HIVE-24793

Compiler probe MJ selection candidate fallback

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    • Sub-task
    • Status: Open
    • Major
    • Resolution: Unresolved
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    Description

      As per discussion on #1286 current probe MJ selection algorithm:

      • selects best MJ candidate (currently based on the distinct row ratio)
      • does some further processing - which may bail out

      Bailing out for the best candidate doesn't necessarily mean that we can not use a less charming candidate. The extra compilation can be wrapped into to for loop instead of selecting the best candidate the first part could be implemented as a priority logic

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            pgaref Panagiotis Garefalakis
            pgaref Panagiotis Garefalakis
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              Updated: