Joe McDonnell created IMPALA-13901:
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             Summary: Make "histogram" and "sample" 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


"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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