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Posted to issues@hive.apache.org by "Ashutosh Chauhan (Jira)" <ji...@apache.org> on 2020/01/29 22:46:00 UTC

[jira] [Reopened] (HIVE-20370) Vectorization: Add Native Vector MapJoin hash table optimization for Left/Right Outer Joins when there are no Small Table values

     [ https://issues.apache.org/jira/browse/HIVE-20370?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ashutosh Chauhan reopened HIVE-20370:
-------------------------------------
      Assignee:     (was: Matt McCline)

> Vectorization: Add Native Vector MapJoin hash table optimization for Left/Right Outer Joins when there are no Small Table values
> --------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-20370
>                 URL: https://issues.apache.org/jira/browse/HIVE-20370
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>            Reporter: Matt McCline
>            Priority: Critical
>         Attachments: HIVE-20370.01.patch, HIVE-20370.02.patch, HIVE-20370.03.patch, HIVE-20370.04.patch
>
>
> Similar to Native Vector MapJoin's InnerBigOnly optimization that uses an efficient Hash Multi-Set with a counter instead of a Hash Map with an empty value, do the same for Outer joins.



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