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https://issues.apache.org/jira/browse/HIVE-12763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15118534#comment-15118534
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Pengcheng Xiong commented on HIVE-12763:
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The failure in TestHiveMetaStorePartitionSpecs is not reproducible. The test
tez_aggr_part_stats is not stable and I replace it with a new JUnit test. No
changes in the code itself. [~alangates], could you take another look? Thanks.
> Use bit vector to track NDV
> ---------------------------
>
> Key: HIVE-12763
> URL: https://issues.apache.org/jira/browse/HIVE-12763
> Project: Hive
> Issue Type: Improvement
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Attachments: HIVE-12763.01.patch, HIVE-12763.02.patch,
> HIVE-12763.03.patch, HIVE-12763.04.patch, HIVE-12763.05.patch
>
>
> This will improve merging of per partitions stats. It will also help merge
> NDV for auto-gather column stats.
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