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https://issues.apache.org/jira/browse/DRILL-1006?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jacques Nadeau resolved DRILL-1006.
-----------------------------------
Resolution: Fixed
Assignee: (was: Jinfeng Ni)
> Fix case expression when conditions are nullable type.
> -------------------------------------------------------
>
> Key: DRILL-1006
> URL: https://issues.apache.org/jira/browse/DRILL-1006
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Jinfeng Ni
>
> There are two issues in case expressions:
> 1. ExpressionValidator enforces that the conditions in a case expression
> have to be non-nullable type. This is not true ; a condition could be a
> nullable type from any expression generating boolean value.
> 2. In EvaluationVisitor when we generate the run-time code, the generated
> code for case expression when the condition is nullable is not valid, causing
> compiler error.
>
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