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https://issues.apache.org/jira/browse/DRILL-4906?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Khurram Faraaz closed DRILL-4906.
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> CASE Expression with constant generates class exception
> -------------------------------------------------------
>
> Key: DRILL-4906
> URL: https://issues.apache.org/jira/browse/DRILL-4906
> Project: Apache Drill
> Issue Type: Bug
> Components: SQL Parser
> Affects Versions: 1.6.0, 1.8.0
> Reporter: Serhii Harnyk
> Assignee: Serhii Harnyk
> Fix For: 1.9.0
>
>
> How to reproduce:
> select (case when (true) then 1 end) from (values(1));
> Error
> Error: SYSTEM ERROR: ClassCastException:
> org.apache.drill.exec.expr.holders.NullableVarCharHolder cannot be cast to
> org.apache.drill.exec.expr.holders.VarCharHolder
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