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[jira] [Created] (CALCITE-2619) Reduce string literal creation cost by removing charset check


Ted Xu created CALCITE-2619:
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             Summary: Reduce string literal creation cost by removing charset check
                 Key: CALCITE-2619
                 URL: https://issues.apache.org/jira/browse/CALCITE-2619
             Project: Calcite
          Issue Type: Improvement
          Components: core
            Reporter: Ted Xu
            Assignee: Julian Hyde


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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