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From "Harish Butani (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-7835) [CBO] Handle a case where FieldTimmer trims all fields from input
Date Tue, 26 Aug 2014 23:31:59 GMT

    [ https://issues.apache.org/jira/browse/HIVE-7835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14111559#comment-14111559
] 

Harish Butani commented on HIVE-7835:
-------------------------------------

+1

> [CBO] Handle a case where FieldTimmer trims all fields from input
> -----------------------------------------------------------------
>
>                 Key: HIVE-7835
>                 URL: https://issues.apache.org/jira/browse/HIVE-7835
>             Project: Hive
>          Issue Type: Sub-task
>          Components: CBO
>            Reporter: Ashutosh Chauhan
>            Assignee: Ashutosh Chauhan
>         Attachments: h-7835.patch
>
>
> eg in queries like select 1 from t1 where nothing needs to be projected we generate empty
project list which results in incorrect ast getting generated. Currently, we fix while generating
ast by eliminating such AST node, but better is to generate correct project list to begin
with.



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