Uploaded image for project: 'Calcite'
  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.

        Attachments

          Activity

            People

            • Assignee:
              julianhyde Julian Hyde
              Reporter:
              julianhyde Julian Hyde
            • Votes:
              0 Vote for this issue
              Watchers:
              1 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: