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Posted to issues@hive.apache.org by "Stamatis Zampetakis (Jira)" <ji...@apache.org> on 2020/08/06 13:30:00 UTC

[jira] [Assigned] (HIVE-23999) Unify the code creating single and multi column semijoin reducers

     [ https://issues.apache.org/jira/browse/HIVE-23999?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stamatis Zampetakis reassigned HIVE-23999:
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> Unify the code creating single and multi column semijoin reducers
> -----------------------------------------------------------------
>
>                 Key: HIVE-23999
>                 URL: https://issues.apache.org/jira/browse/HIVE-23999
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Stamatis Zampetakis
>            Assignee: Stamatis Zampetakis
>            Priority: Major
>
> In HIVE-21196, we add a transformation capable of merging single column semijoin reducers to multi column semijoin reducer.
> The code for creating multi-column semijoin reducers in SemiJoinReductionMerge presents some similarities with the code creating single-column semijoin reducers in DynamicPartitionPruningOptimization.
> Possibly we could refactor the respective parts to unify the creation logic of semijoin reducers.



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