hadoop-hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-460) Improve ColumnPruner to prune more aggressively and keep column information for input tables
Date Mon, 08 Jun 2009 18:20:07 GMT

    [ https://issues.apache.org/jira/browse/HIVE-460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12717352#action_12717352
] 

Namit Jain commented on HIVE-460:
---------------------------------

Mostly looks good, but I had some questions for ColumnPruner.

Only reduceSinkDesc is getting patched below the Select - what if a groupBy is present - doesnt
the column names of group by also need to be patched, or the assumption is that it is always
a subset of the select columns and therefore we dont need to do anything.



> Improve ColumnPruner to prune more aggressively and keep column information for input
tables
> --------------------------------------------------------------------------------------------
>
>                 Key: HIVE-460
>                 URL: https://issues.apache.org/jira/browse/HIVE-460
>             Project: Hadoop Hive
>          Issue Type: Improvement
>          Components: Query Processor
>    Affects Versions: 0.4.0
>            Reporter: Zheng Shao
>            Assignee: He Yongqiang
>         Attachments: hive-460-2009-05-29-noaliasallowed.patch, hive-460-2009-06-04-2-195mapjoin.patch,
hive-460-2009-06-04-testcli-passed.patch, hive-460-2009-06-06-2.patch, HIVE-460.1.patch
>
>
> This is required for column-based table format.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message