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https://issues.apache.org/jira/browse/HIVE-7835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14111559#comment-14111559
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Harish Butani commented on HIVE-7835:
-------------------------------------
+1
> [CBO] Handle a case where FieldTimmer trims all fields from input
> -----------------------------------------------------------------
>
> Key: HIVE-7835
> URL: https://issues.apache.org/jira/browse/HIVE-7835
> Project: Hive
> Issue Type: Sub-task
> Components: CBO
> Reporter: Ashutosh Chauhan
> Assignee: Ashutosh Chauhan
> Attachments: h-7835.patch
>
>
> eg in queries like select 1 from t1 where nothing needs to be projected we
> generate empty project list which results in incorrect ast getting generated.
> Currently, we fix while generating ast by eliminating such AST node, but
> better is to generate correct project list to begin with.
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