hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jesus Camacho Rodriguez (JIRA)" <j...@apache.org>
Subject [jira] [Work started] (HIVE-13096) Cost to choose side table in MapJoin conversion based on cumulative cardinality
Date Sun, 21 Feb 2016 12:10:18 GMT

     [ https://issues.apache.org/jira/browse/HIVE-13096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Work on HIVE-13096 started by Jesus Camacho Rodriguez.
------------------------------------------------------
> Cost to choose side table in MapJoin conversion based on cumulative cardinality
> -------------------------------------------------------------------------------
>
>                 Key: HIVE-13096
>                 URL: https://issues.apache.org/jira/browse/HIVE-13096
>             Project: Hive
>          Issue Type: Bug
>          Components: Physical Optimizer
>    Affects Versions: 2.0.0, 2.1.0
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>         Attachments: HIVE-13096.01.patch, HIVE-13096.patch
>
>
> HIVE-11954 changed the logic to choose the side table in the MapJoin conversion algorithm.
Initial heuristic for the cost was based on number of heavyweight operators.
> This extends that work so the heuristic is based on accumulate cardinality. In the future,
we should choose the side based on total latency for the input.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message