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https://issues.apache.org/jira/browse/CALCITE-4757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17428536#comment-17428536
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Julian Hyde commented on CALCITE-4757:
--------------------------------------
Added a test in Calcite in
[a7728d79|https://github.com/apache/calcite/commit/a7728d79878a6e4c063e7646cd4e6f4f1ce9c2ea].
> In Avatica, support columns of type "NULL" in query results
> -----------------------------------------------------------
>
> Key: CALCITE-4757
> URL: https://issues.apache.org/jira/browse/CALCITE-4757
> Project: Calcite
> Issue Type: Bug
> Components: avatica
> Affects Versions: avatica-1.18.0
> Reporter: duan xiong
> Assignee: duan xiong
> Priority: Major
> Fix For: avatica-1.19.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> When I run:
> {code:java}
> select * from (values(null,true))
> {code}
> Caused by: java.lang.RuntimeException: unknown type 0.
> Looks like AvaticaSite can't handle Types.NULL.
>
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