drill-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jason Altekruse (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-3323) Flatten planning rule creates unneeded copy of the list being flattened, causes executuion/allocation issues with large lists
Date Fri, 26 Jun 2015 17:56:06 GMT

     [ https://issues.apache.org/jira/browse/DRILL-3323?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Altekruse updated DRILL-3323:
-----------------------------------
    Fix Version/s:     (was: 1.1.0)
                   1.2.0

> Flatten planning rule creates unneeded copy of the list being flattened, causes executuion/allocation
issues with large lists
> -----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: DRILL-3323
>                 URL: https://issues.apache.org/jira/browse/DRILL-3323
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Flow
>            Reporter: Jason Altekruse
>            Assignee: Jason Altekruse
>             Fix For: 1.2.0
>
>
> The planning rule for flatten was written to not only handle the flatten operator, but
it also was designed to address some shortcomings in expression evaluation involving complex
types. The rule currently plans inefficiently to try to cover some of these more advanced
cases, but there is not thorough test coverage to even demonstrate the benefits of it. We
should disable a particular behavior of copying complex data and extra time when it is not
needed, because it is causing flatten queries to fail with allocation issues. 



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

Mime
View raw message