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https://issues.apache.org/jira/browse/HIVE-13602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15255937#comment-15255937
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Nemon Lou commented on HIVE-13602:
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The join order seems to be the same for both queries.The difference is that the
bad plan only select three columns for table part at stage-1 (p_brand is
missing),the good one select four.
> TPCH q16 return wrong result when CBO is on
> -------------------------------------------
>
> Key: HIVE-13602
> URL: https://issues.apache.org/jira/browse/HIVE-13602
> Project: Hive
> Issue Type: Bug
> Components: CBO, Logical Optimizer
> Affects Versions: 1.2.1
> Reporter: Nemon Lou
> Assignee: Pengcheng Xiong
> Attachments: calcite_cbo_bad.out, calcite_cbo_good.out,
> explain_cbo_bad_part1.out, explain_cbo_bad_part2.out,
> explain_cbo_bad_part3.out, explain_cbo_good(rewrite)_part1.out,
> explain_cbo_good(rewrite)_part2.out, explain_cbo_good(rewrite)_part3.out
>
>
> Running tpch with factor 2,
> q16 returns 1,160 rows when CBO is on,
> while returns 59,616 rows when CBO is off.
> See attachment for detail .
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