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Posted to issues@hive.apache.org by "Matt McCline (JIRA)" <ji...@apache.org> on 2018/08/13 04:44:00 UTC

[jira] [Assigned] (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 ]

Matt McCline reassigned HIVE-20370:
-----------------------------------


> 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
>            Assignee: Matt McCline
>            Priority: Critical
>
> 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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