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https://issues.apache.org/jira/browse/HIVE-15458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15852147#comment-15852147
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Vineet Garg commented on HIVE-15458:
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As a fix we have decided to add a Project on top of Join in SemiJoin conversion
rule (instead of doing this in ASTConverter as Ashutosh suggested)
> Fix semi-join conversion rule for subquery
> ------------------------------------------
>
> Key: HIVE-15458
> URL: https://issues.apache.org/jira/browse/HIVE-15458
> Project: Hive
> Issue Type: Sub-task
> Components: Logical Optimizer
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Attachments: HIVE-15458.1.patch
>
>
> Subquery code in *CalcitePlanner* turns off *hive.enable.semijoin.conversion*
> since it doesn't work for subqueries.
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