[DRILL-4906] CASE Expression with constant generates class exception

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.6.0, 1.8.0
• Fix Version/s: 1.9.0
• Component/s: SQL Parser
• Assignee: Serhii Harnyk
• Reporter: Serhii Harnyk
• Reviewer: Khurram Faraaz
• Created: 27/Sep/16 11:22
• Updated: 14/Dec/16 03:24
• Resolved: 06/Oct/16 01:13

Description

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

Issue Links

• links to: GitHub Pull Request #598