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  1. Calcite
  2. CALCITE-2619

Reduce string literal creation cost by removing unnecessary charset check

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 1.18.0
    • core
    • None

    Description

      The cost of creating NlsString is very high, due to its charset check. In some cases, e.g., expression evaluate because of Partition Prune, the NlsString creation costs 40%+ of total executor's overhead.

       

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          is related to

          Bug - A problem which impairs or prevents the functions of the product. CALCITE-2616 Can't create Unicode literal by RelBuilder

          • Major - Major loss of function.
          • Open

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              julianhyde Julian Hyde
              tedxu Ted Xu
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              Dates

                Created:
                Updated:
                Resolved: