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From "Ashish Thusoo (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-497) predicate pushdown fails if all columns are not selected
Date Wed, 20 May 2009 21:34:45 GMT

    [ https://issues.apache.org/jira/browse/HIVE-497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12711365#action_12711365
] 

Ashish Thusoo commented on HIVE-497:
------------------------------------

Yes we should, we definitely have to do it before putting it into production.

Need a new JIRA for that. Can you do the honors?


> predicate pushdown fails if all columns are not selected
> --------------------------------------------------------
>
>                 Key: HIVE-497
>                 URL: https://issues.apache.org/jira/browse/HIVE-497
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.4.0
>            Reporter: Prasad Chakka
>            Assignee: Prasad Chakka
>             Fix For: 0.4.0
>
>         Attachments: hive-497.2.patch, hive-497.patch
>
>
> predicate pushdown seems to fail in some scenarios... it is ok if all the columns are
selected.
> create table ppda(a string, b string);
> select a from ppda where ppda.a > 10; --> fails
> select b from ppda where ppda.a > 10; --> ok
> select * from ppda where ppda.a > 10; --> ok
> select b from appd where appd.b > 10 and appd.a > 20; --> ok

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