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https://issues.apache.org/jira/browse/HIVE-11496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14660973#comment-14660973
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Prasanth Jayachandran commented on HIVE-11496:
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This patch adds only limited basic tests. I will add more tests after
HIVE-11312, HIVE-11477, HIVE-11493 and HIVE-11494 are fixed.
> 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
> Attachments: HIVE-11496.1.patch
>
>
> 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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