You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@hive.apache.org by jian yi <ey...@gmail.com> on 2010/02/26 04:36:47 UTC
Re: [jira] Commented: (HIVE-474) Support for distinct selection on
two or more columns
Hi Liu,
How to implement to support for distinct selection on two or more columns?
Regards
Jian
2010/2/26 Liu (JIRA) <ji...@apache.org>
>
> [
> https://issues.apache.org/jira/browse/HIVE-474?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12838683#action_12838683]
>
> Liu commented on HIVE-474:
> --------------------------
>
> We have implemented this feature using union type, as metioned as "A2" by
> Zheng.
>
> > Support for distinct selection on two or more columns
> > -----------------------------------------------------
> >
> > Key: HIVE-474
> > URL: https://issues.apache.org/jira/browse/HIVE-474
> > Project: Hadoop Hive
> > Issue Type: Improvement
> > Components: Query Processor
> > Reporter: Alexis Rondeau
> >
> > The ability to select distinct several, individual columns as by example:
> > select count(distinct user), count(distinct session) from actions;
> > Currently returns the following failure:
> > FAILED: Error in semantic analysis: line 2:7 DISTINCT on Different
> Columns not Supported user
>
> --
> This message is automatically generated by JIRA.
> -
> You can reply to this email to add a comment to the issue online.
>
>
--
Hadoop Forum: http://bbs.hadoopor.com