You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hive.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/08/06 23:30:00 UTC

[jira] [Work logged] (HIVE-22074) Slow compilation due to IN to OR transformation

     [ https://issues.apache.org/jira/browse/HIVE-22074?focusedWorklogId=290061&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-290061 ]

ASF GitHub Bot logged work on HIVE-22074:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 06/Aug/19 23:29
            Start Date: 06/Aug/19 23:29
    Worklog Time Spent: 10m 
      Work Description: vineetgarg02 commented on pull request #746: HIVE-22074: Slow compilation due to IN to OR transformation
URL: https://github.com/apache/hive/pull/746
 
 
   
 
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


Issue Time Tracking
-------------------

            Worklog Id:     (was: 290061)
            Time Spent: 10m
    Remaining Estimate: 0h

> Slow compilation due to IN to OR transformation
> -----------------------------------------------
>
>                 Key: HIVE-22074
>                 URL: https://issues.apache.org/jira/browse/HIVE-22074
>             Project: Hive
>          Issue Type: Improvement
>          Components: Logical Optimizer
>            Reporter: Vineet Garg
>            Assignee: Vineet Garg
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HIVE-22074.1.patch, HIVE-22074.2.patch, HIVE-22074.3.patch, HIVE-22074.4.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Currently Hive transform IN expressions to OR to apply various CBO rules. This incur significant performance hit if IN consist of large number of expressions. 
> It is better to not transform IN expressions to OR in such cases because overall benefit of various optimizations/transformations is unrealized due to the compilation overhead



--
This message was sent by Atlassian JIRA
(v7.6.14#76016)