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  1. Calcite
  2. CALCITE-2471

RelNode description includes all tree when recomputed

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 1.19.0
    • core
    • None

    Description

      The initial AbstractRelNode description is `typeName#id` but when recomputed, it includes all its inputs (and other attributes).

      When creating the final plan, HepPlanner visits each node bottom up, and recomputes the node digest. This causes node description to grow in size, up to the top node which contains basically a string copy of the whole tree. On large trees, this may consume a non-significant amount of memory.

      See email thread: https://lists.apache.org/thread.html/5e71c9f2b4e83865805841708f53471cfab1b5de673e6f162b68edc9@%3Cdev.calcite.apache.org%3E

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        Issue Links

          blocks

          Bug - A problem which impairs or prevents the functions of the product. CALCITE-2575 Release Calcite 1.18.0

          • Major - Major loss of function.
          • Closed
          relates to

          Improvement - An improvement or enhancement to an existing feature or task. CALCITE-2690 Uses `getDigest ` instead of `toString` when gets RelNode's digest

          • Major - Major loss of function.
          • Open
          links to

          Web Link PR #795

          Activity

            People

              julianhyde Julian Hyde
              laurent Laurent Goujon
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              Dates

                Created:
                Updated:
                Resolved: