hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "John Sichi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2344) filter is removed due to regression of HIVE-1538
Date Wed, 10 Aug 2011 16:58:27 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13082469#comment-13082469
] 

John Sichi commented on HIVE-2344:
----------------------------------

It's possible to avoid the double computation (by pushing the selection down too, similar
to column pruning), but I'm fine with skipping that and not pushing the expression beyond
the select.

> filter is removed due to regression of HIVE-1538
> ------------------------------------------------
>
>                 Key: HIVE-2344
>                 URL: https://issues.apache.org/jira/browse/HIVE-2344
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.8.0
>            Reporter: He Yongqiang
>            Assignee: Amareshwari Sriramadasu
>             Fix For: 0.8.0
>
>         Attachments: hive-patch-2344.txt, ppd_udf_col.q.out.txt
>
>
>  select * from 
>  (
>  select type_bucket,randum123
>  from (SELECT *, cast(rand() as double) AS randum123 FROM tbl where ds = ...) a
>  where randum123 <=0.1)s where s.randum123>0.1 limit 20;
> This is returning results...
> and 
>  explain
>  select type_bucket,randum123
>  from (SELECT *, cast(rand() as double) AS randum123 FROM tbl where ds = ...) a
>  where randum123 <=0.1
> shows that there is no filter.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message