[jira] [Comment Edited] (HIVE-13821) OrcSplit groups all delta files together into a single split

["Prasanth Jayachandran (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-13821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15296995#comment-15296995 ] 

Prasanth Jayachandran edited comment on HIVE-13821 at 5/23/16 8:09 PM:
-----------------------------------------------------------------------

[~ekoifman] Added a unit test.


was (Author: prasanth_j):
[~aechttpd] Added a unit test.

> OrcSplit groups all delta files together into a single split
> ------------------------------------------------------------
>
>                 Key: HIVE-13821
>                 URL: https://issues.apache.org/jira/browse/HIVE-13821
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>    Affects Versions: 2.1.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Critical
>         Attachments: HIVE-13821.1.patch, HIVE-13821.2.patch
>
>
> HIVE-7428 had fix for worst case column projection size estimate. It was removed in HIVE-10397 to return file length but for ACID strategy file length is passed as 0. In worst case, this always return 0 and all files ends up in single split. 



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