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https://issues.apache.org/jira/browse/CALCITE-2619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ted Xu updated CALCITE-2619:
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Summary: Reduce string literal creation cost by removing unnecessary
charset check (was: Reduce string literal creation cost by removing charset
check)
> Reduce string literal creation cost by removing unnecessary 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
> Priority: Major
>
> 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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