Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.12.0
    • Component/s: None
    • Labels:
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      Description

      Add MinRowCount metadata, that describes that a RelNode will never return fewer than N rows.

      The GROUP BY () operation has a peculiar effect if its input is empty: it increases the number of rows to 1. So, it is useful to know that a RelNode can never be empty, and a MinRowCount of 1 or higher communicates that.

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            • Assignee:
              julianhyde Julian Hyde
              Reporter:
              julianhyde Julian Hyde
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              • Created:
                Updated:
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