Prasanth Jayachandran created HIVE-11496:
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             Summary: Better tests for evaluating ORC predicate pushdown
                 Key: HIVE-11496
                 URL: https://issues.apache.org/jira/browse/HIVE-11496
             Project: Hive
          Issue Type: Improvement
    Affects Versions: 1.3.0, 2.0.0
            Reporter: Prasanth Jayachandran
            Assignee: Prasanth Jayachandran


There were many regressions recently wrt ORC predicate pushdown. We don't have 
system tests to capture these regressions. Currently there is only junit tests 
for testing ORC predicate pushdown feature. Since hive counters are not 
available during qfile test execution there is no easy way to verify if ORC PPD 
feature worked or not. This jira is add a post execution hook to print hive 
counters (esp. number of input records) to error stream so that it will appear 
in qfile test output. This way we can verify ORC SARG evaluation and avoid 
future regressions.



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