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Posted to jira@arrow.apache.org by "Sasha Krassovsky (Jira)" <ji...@apache.org> on 2021/10/30 01:09:00 UTC

[jira] [Assigned] (ARROW-13643) [C++][Compute] Implement outer join with support for residual predicates

     [ https://issues.apache.org/jira/browse/ARROW-13643?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sasha Krassovsky reassigned ARROW-13643:
----------------------------------------

    Assignee: Sasha Krassovsky  (was: Michal Nowakiewicz)

> [C++][Compute] Implement outer join with support for residual predicates
> ------------------------------------------------------------------------
>
>                 Key: ARROW-13643
>                 URL: https://issues.apache.org/jira/browse/ARROW-13643
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>    Affects Versions: 6.0.0
>            Reporter: Michal Nowakiewicz
>            Assignee: Sasha Krassovsky
>            Priority: Minor
>              Labels: query-engine
>             Fix For: 7.0.0
>
>
> Residual predicates are evaluated after finding matches using equality condition on key columns, but before deciding whether an input had a match for the join and resolving outer references. They allow to implement in a simple (but potentially inefficient) way inequality predicates that accompany equality predicates in join condition.



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