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  1. Calcite
  2. CALCITE-3990

Use a more efficient algorithm for cost propagation in Volcano planner

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Details

    • Improvement
    • Status: Closed
    • Minor
    • Resolution: Duplicate
    • None
    • None
    • core
    • None

    Description

      The previous method uses a recursive, depth-first approach, which can result
      in repeatedly updating the cost of some relSubsets many times.

      This patch moves to a breadth-first approach with a priority queue,
      very similar to Djikstra's algorithm.

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        duplicates

        Bug - A problem which impairs or prevents the functions of the product. CALCITE-3330 propagateCostImprovements() could result in stack overflow

        • Major - Major loss of function.
        • Closed

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            Unassigned Unassigned
            levv James Kim
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              Updated:
              Resolved:

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