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https://issues.apache.org/jira/browse/IMPALA-967?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong reassigned IMPALA-967:
------------------------------------

    Assignee:     (was: Mostafa Mokhtar)

> Investigate wide table performance
> ----------------------------------
>
>                 Key: IMPALA-967
>                 URL: https://issues.apache.org/jira/browse/IMPALA-967
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Perf Investigation
>    Affects Versions: Impala 1.3
>            Reporter: Skye Wanderman-Milne
>            Priority: Minor
>              Labels: codegen
>
> Querying wide tables (very roughly 1000+ columns) is very slow. It looks like 
> the time is spent in planning and/or codegen, and that the time increases 
> worse than linearly with the number of columns.



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