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Posted to issues@hive.apache.org by "Stamatis Zampetakis (Jira)" <ji...@apache.org> on 2020/08/03 12:30:00 UTC

[jira] [Assigned] (HIVE-23976) Enable vectorization for multi-col semi join reducers

     [ https://issues.apache.org/jira/browse/HIVE-23976?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stamatis Zampetakis reassigned HIVE-23976:
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> Enable vectorization for multi-col semi join reducers
> -----------------------------------------------------
>
>                 Key: HIVE-23976
>                 URL: https://issues.apache.org/jira/browse/HIVE-23976
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Stamatis Zampetakis
>            Assignee: Stamatis Zampetakis
>            Priority: Major
>
> HIVE-21196 introduces multi-column semi-join reducers in the query engine. However, the implementation relies on GenericUDFMurmurHash which is not vectorized thus the respective operators cannot be executed in vectorized mode. 



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