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  1. Calcite
  2. CALCITE-1056

Simplify predicate of JOIN, and optimize away LIMIT 0

          Details

          • Type: Bug
          • Status: Closed
          • Priority: Major
          • Resolution: Fixed
          • Affects Version/s: None
          • Fix Version/s: 1.7.0
          • Component/s: None
          • Labels:
            None

            Description

            Following CALCITE-996, RelBuilder should simplify predicates in other situations, such as the and method and the join method.

            RelBuilder.filter(false) and RelBuilder.limit(0, 0) should simplify to RelBuilder.empty(), a new method that returns an empty relation. The default implementation returns a Values with no rows, but schema-on-query systems such as Drill might override the empty method.

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                  • Assignee:
                    julianhyde Julian Hyde
                    Reporter:
                    julianhyde Julian Hyde
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