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Posted to issues@drill.apache.org by "Jacques Nadeau (JIRA)" <ji...@apache.org> on 2014/07/31 07:53:43 UTC

[jira] [Resolved] (DRILL-1095) Add support for large number of columns in queries

     [ https://issues.apache.org/jira/browse/DRILL-1095?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jacques Nadeau resolved DRILL-1095.
-----------------------------------

    Resolution: Fixed

> Add support for large number of columns in queries
> --------------------------------------------------
>
>                 Key: DRILL-1095
>                 URL: https://issues.apache.org/jira/browse/DRILL-1095
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Codegen, Metadata, Storage - Writer
>            Reporter: Rahul Challapalli
>            Assignee: Aditya Kishore
>            Priority: Blocker
>             Fix For: 0.4.0
>
>         Attachments: error.log
>
>
> git.commit.id.abbrev=a1a6144
> Build#  26246
> The 'create table as' statement starts to break when the column count is somewhere around 125-150. I attached the error log. Let me know if you have any questions.
> The root cause of this (and similar failures) is that when a Drill operator needs to process (evaluate/copy/spool) a large number of expressions (columns), the resultant runtime generated code can exceed the [64 KB byte code limit|http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.9.1-110-B] imposed on the size of a function by Java class file specifications, resulting in compilation failure.
> This umbrella JIRA will serve as a container for various sub-tasks to address this issue.



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