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Posted to dev@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2013/10/16 19:17:46 UTC

[jira] [Commented] (HIVE-5563) Skip reading columns in ORC for count(*)

    [ https://issues.apache.org/jira/browse/HIVE-5563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13797014#comment-13797014 ] 

Ashutosh Chauhan commented on HIVE-5563:
----------------------------------------

HIVE-5546 got committed an hour back, which supposedly fixed this.

> Skip reading columns in ORC for count(*)
> ----------------------------------------
>
>                 Key: HIVE-5563
>                 URL: https://issues.apache.org/jira/browse/HIVE-5563
>             Project: Hive
>          Issue Type: Bug
>          Components: File Formats
>            Reporter: Owen O'Malley
>
> With HIVE-4113, the semantics of ColumnProjectionUtils.getReadColumnIds was fixed so that an empty list means no columns instead of all columns. (Except the caveat of the override of ColumnProjectionUtils.isReadAllColumns.)
> However, ORC's reader wasn't updated so it still reads all columns.



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