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Posted to dev@hive.apache.org by "Sushanth Sowmyan (JIRA)" <ji...@apache.org> on 2014/03/01 00:24:19 UTC

[jira] [Commented] (HIVE-5193) Columnar Pushdown for RC/ORC File not happening in HCatLoader

    [ https://issues.apache.org/jira/browse/HIVE-5193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13916570#comment-13916570 ] 

Sushanth Sowmyan commented on HIVE-5193:
----------------------------------------

Hi Viraj,

A couple of quick notes:

a) If you cancel your patch, rename it to HIVE-5193.2.patch, re-upload and mark as patch-avaliable, then the pre-commit tests will pick it up.
b) Please do not modify any of the org.apache.hcatalog.* classes - they are deprecated and are being maintained in parity with the state they were in as of hive-0.11. The only reason we'd change them is if they do not build any more due to issues with hadoop or hive/etc. Bugfixes are to go on to org.apache.hive.hcatalog.* only for now.

> Columnar Pushdown for RC/ORC File not happening in HCatLoader 
> --------------------------------------------------------------
>
>                 Key: HIVE-5193
>                 URL: https://issues.apache.org/jira/browse/HIVE-5193
>             Project: Hive
>          Issue Type: Improvement
>          Components: HCatalog
>    Affects Versions: 0.10.0, 0.11.0, 0.12.0
>            Reporter: Viraj Bhat
>            Assignee: Viraj Bhat
>              Labels: hcatalog
>             Fix For: 0.13.0
>
>         Attachments: HIVE-5193-2.patch, HIVE-5193.patch
>
>
> Currently the HCatLoader is not taking advantage of the ColumnProjectionUtils. where it could skip columns during read. The information is available in Pig it just needs to get to the Readers.
> Viraj



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