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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9255) Fastpath for limited fetches from unpartitioned tables
Date Wed, 07 Jan 2015 21:54:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9255?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14268320#comment-14268320
] 

Ashutosh Chauhan commented on HIVE-9255:
----------------------------------------

Looks good. Can you update the comment in else if block (looks like copy-pasted). Also, seems
like few of golden files (per Hive QA) needs an update.

> Fastpath for limited fetches from unpartitioned tables
> ------------------------------------------------------
>
>                 Key: HIVE-9255
>                 URL: https://issues.apache.org/jira/browse/HIVE-9255
>             Project: Hive
>          Issue Type: Bug
>          Components: Physical Optimizer
>    Affects Versions: 0.14.0, 0.15.0
>            Reporter: Gopal V
>            Assignee: Gopal V
>            Priority: Minor
>         Attachments: HIVE-9255.1.patch
>
>
> Currently, for flat tables, the threshold check is applicable for a query like {{select
* from lineitem limit 1;}}.
> This is not necessary as without a filter clause, this can be executed entirely via FetchTask.
Running a cluster task is redundant for this case.
> This fastpath is applicable for partitioned tables already.



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