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https://issues.apache.org/jira/browse/IMPALA-14903?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Carlin resolved IMPALA-14903.
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Resolution: Fixed
> Calcite planner: Simplify String RelDataType
> --------------------------------------------
>
> Key: IMPALA-14903
> URL: https://issues.apache.org/jira/browse/IMPALA-14903
> Project: IMPALA
> Issue Type: Sub-task
> Reporter: Steve Carlin
> Priority: Major
>
> By default, Calcite always sets string literals to type "char" whereas Impala
> needs string literals to be type "string".
> The current code committed works around this by creating a cast around the
> column. This complicated the code. For example, A Values RelNode cannot have
> a cast, so a Project RelNode had to be created on top of a Values RelNode to
> handle the cast.
> This code should be simplified
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