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https://issues.apache.org/jira/browse/HIVE-25269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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GuangMing Lu updated HIVE-25269:
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Attachment: (was: test.sql)
> When the skew and parallel parameters are true simultaneously, the result is
> less data
> --------------------------------------------------------------------------------------
>
> Key: HIVE-25269
> URL: https://issues.apache.org/jira/browse/HIVE-25269
> Project: Hive
> Issue Type: Bug
> Components: Physical Optimizer, SQL
> Affects Versions: 3.1.0, 3.1.2
> Reporter: GuangMing Lu
> Priority: Major
> Attachments: comb_classcode.data, 样例分析-表入数据.sql
>
>
> When the params of hive.optimize.skewjoin, hive.groupby.skewindata and
> hive.exec.parallel are true, and exec sql such as 'INSERT... FROM (SUBQUERY
> UNIONALL ...GROUP BY...) A JOIN/LEFT JOIN A.expression', result data will be
> reduced. Details of SQL and test data can be found in the attachment
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