You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hive.apache.org by "Zoltan Haindrich (JIRA)" <ji...@apache.org> on 2018/09/05 11:29:00 UTC
[jira] [Updated] (HIVE-20504) Give simple MJ bigger priority than
bucketized ones
[ https://issues.apache.org/jira/browse/HIVE-20504?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zoltan Haindrich updated HIVE-20504:
------------------------------------
Status: Patch Available (was: Open)
> Give simple MJ bigger priority than bucketized ones
> ---------------------------------------------------
>
> Key: HIVE-20504
> URL: https://issues.apache.org/jira/browse/HIVE-20504
> Project: Hive
> Issue Type: Improvement
> Components: Statistics
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Attachments: HIVE-20504.01wip01.patch
>
>
> from the code it seems "standard" mapjoin is one of the last one tried; in case the table estimated to be bucketed in to 2 - but it's small ; Hive willl do a bucketmapjoin or dphj...even thru a simple mapjoin could have been an alternative...
> https://github.com/apache/hive/blob/154ca3e3b5eb78cd49a4b3650c750ca731fba7da/ql/src/java/org/apache/hadoop/hive/ql/optimizer/ConvertJoinMapJoin.java#L157
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)