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  1. Calcite
  2. CALCITE-790

Remove relational expressions that reference themselves

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Details

    • Bug
    • Status: In Progress
    • Major
    • Resolution: Unresolved
    • None
    • None
    • None
    • None

    Description

      Sometimes when two equivalence sets are merged (i.e. discovered to be equivalent) relational expressions in the sets end up referencing themselves. These are impossible to implement, cause a lot of useless rules to fire, and may cause stats calculations to go into a loop.

      We should look for cyclic expressions after merging sets and remove them.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. CALCITE-1048 Make metadata more robust

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. CALCITE-794 Detect cycles when computing statistics

          • Major - Major loss of function.
          • Closed

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              julianhyde Julian Hyde
              julianhyde Julian Hyde
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              Dates

                Created:
                Updated: