hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Gunther Hagleitner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11471) Expose query cost estimates (from CBO?) in explain plan
Date Wed, 05 Aug 2015 21:06:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14658934#comment-14658934
] 

Gunther Hagleitner commented on HIVE-11471:
-------------------------------------------

We already expose datasize/row count estimates in explain. Given that our cost model is based
on cardinality right now, what else are you asking?

> Expose query cost estimates (from CBO?) in explain plan
> -------------------------------------------------------
>
>                 Key: HIVE-11471
>                 URL: https://issues.apache.org/jira/browse/HIVE-11471
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>
> Some users of Hive suggested that it would be useful to see abstract cost of the query
plan in explain, so that different manual rewrites of the query could be compared before running.




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

Mime
View raw message