phoenix-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "chenglei (Jira)" <j...@apache.org>
Subject [jira] [Updated] (PHOENIX-5956) Optimize LeftSemiJoin For SortMergeJoin
Date Tue, 16 Jun 2020 10:09:00 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-5956?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

chenglei updated PHOENIX-5956:
------------------------------
    Attachment: PHOENIX-5956_v1-4.x.patch

> Optimize LeftSemiJoin For SortMergeJoin 
> ----------------------------------------
>
>                 Key: PHOENIX-5956
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-5956
>             Project: Phoenix
>          Issue Type: Improvement
>    Affects Versions: 4.15.0
>            Reporter: chenglei
>            Assignee: chenglei
>            Priority: Major
>             Fix For: 5.1.0, 4.16.0
>
>         Attachments: PHOENIX-5956_v1-4.x.patch
>
>
> When LHS left semi join RHS through SortMergeJoin, if RHS is end and returns null, then
the left semi join could end early, but for {{SortMergeJoinPlan.SemiAntiJoinIterator}} , it
would continue until LHS is exhausted even if RHS returns null, which is unnecessary.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

Mime
View raw message