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https://issues.apache.org/jira/browse/HIVE-10479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14593672#comment-14593672
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Laljo John Pullokkaran commented on HIVE-10479:
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+1
> CBO: Calcite Operator To Hive Operator (Calcite Return Path) Empty tabAlias
> in columnInfo which triggers PPD
> ------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-10479
> URL: https://issues.apache.org/jira/browse/HIVE-10479
> Project: Hive
> Issue Type: Sub-task
> Components: CBO
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Attachments: HIVE-10479.01.patch, HIVE-10479.02.patch,
> HIVE-10479.03.patch, HIVE-10479.patch
>
>
> in ql/src/java/org/apache/hadoop/hive/ql/ppd/OpProcFactory.java, line 477,
> when aliases contains empty string "" and key is an empty string "" too, it
> assumes that aliases contains key. This will trigger incorrect PPD. To
> reproduce it, apply the HIVE-10455 and run cbo_subq_notin.q.
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