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https://issues.apache.org/jira/browse/IMPALA-13901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on IMPALA-13901 started by Joe McDonnell.
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> Make "histogram","sample", and "group_concat" ineligible for tuple caching
> --------------------------------------------------------------------------
>
> Key: IMPALA-13901
> URL: https://issues.apache.org/jira/browse/IMPALA-13901
> Project: IMPALA
> Issue Type: Task
> Components: Frontend
> Affects Versions: Impala 5.0.0
> Reporter: Joe McDonnell
> Assignee: Joe McDonnell
> Priority: Major
>
> "histogram" and "sample" use the same infrastructure as "appx_median", which
> includes randomness. These functions should be marked ineligible for tuple
> caching. This came up in some test cases when running with tuple cache
> verification.
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