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  1. Calcite
  2. CALCITE-3819

Prune parent RelNode when merging child RelSet with parent RelSet

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.23.0
    • Component/s: core

      Description

      Suppose we have 2 RelSets:
      RelSet A: rel1
      RelSet B: rel2

      rel1 is the parent of rel2.

      If there is a transformation rule that transform rel1 to rel2, we will merge RelSet A and B. During merge process, we can safely prune rel1 to avoid further rule apply on rel1 and reduce search space, more importantly, avoid cyclic reference.

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            • Assignee:
              hyuan Haisheng Yuan
              Reporter:
              hyuan Haisheng Yuan
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