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https://issues.apache.org/jira/browse/HIVE-16245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15930597#comment-15930597
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Matt McCline commented on HIVE-16245:
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Solution has not been verified on the cluster it occurred on yet...
> Vectorization: Does not handle non-column key expressions in MERGEPARTIAL mode
> ------------------------------------------------------------------------------
>
> Key: HIVE-16245
> URL: https://issues.apache.org/jira/browse/HIVE-16245
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Reporter: Matt McCline
> Assignee: Matt McCline
> Priority: Critical
> Attachments: HIVE-16245.01.patch
>
>
> When the planner is able to make a column a constant, MERGEPARTIAL mode in
> VectorGroupByOperator is broken because it doesn't evaluate the key
> expression. One result is execution cast exception errors.
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