You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hive.apache.org by "Deepak Jaiswal (JIRA)" <ji...@apache.org> on 2017/02/03 22:33:51 UTC
[jira] [Updated] (HIVE-15808) Remove Semijoin reduction branch on
reducers if there is hash join
[ https://issues.apache.org/jira/browse/HIVE-15808?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Deepak Jaiswal updated HIVE-15808:
----------------------------------
Status: Patch Available (was: Open)
> Remove Semijoin reduction branch on reducers if there is hash join
> ------------------------------------------------------------------
>
> Key: HIVE-15808
> URL: https://issues.apache.org/jira/browse/HIVE-15808
> Project: Hive
> Issue Type: Bug
> Reporter: Deepak Jaiswal
> Assignee: Deepak Jaiswal
>
> It is found that the current logic of cycle detection does not find cycles created when there is a semijoin branch parallel to a hash join on a reducer.
> To avoid such cycles, remove the semijoin reduction optimization.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)