hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Laljo John Pullokkaran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-8089) Ordering is lost when limit is put in outer query
Date Wed, 17 Sep 2014 20:59:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-8089?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14137972#comment-14137972
] 

Laljo John Pullokkaran commented on HIVE-8089:
----------------------------------------------

We support order in subquery when limit is present; but ordering fails only when a limit is
specified in outer query.

> Ordering is lost when limit is put in outer query
> -------------------------------------------------
>
>                 Key: HIVE-8089
>                 URL: https://issues.apache.org/jira/browse/HIVE-8089
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Laljo John Pullokkaran
>            Assignee: Sergey Shelukhin
>
> It seems like hive supports order by, limit in sub queries (compiler doesn't complain).
However ordering seems to be lost based on where you place the limit.   I haven't debugged
the issue.
> ex:
> select key, c_int from (select key, c_int from (select key, c_int from t1 order by c_int
limit 5)t1)t1;
> null	NULL
> null	NULL
> 1	1
> 1	1
> 1	1
> select key, c_int from (select key, c_int from (select key, c_int from t1 order by c_int)t1
limit 5)t1;
> 1	1
> 1	1
> 1	1
> null	NULL
> null	NULL
> select key, c_int from (select key, c_int from (select key, c_int from t1 order by c_int
limit 5)t1 limit 5)t1;
> 1	1
> 1	1
> 1	1
> null	NULL
> null	NULL



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message