[jira] [Reopened] (HIVE-8089) Ordering is lost when limit is put in outer query

["Sergey Shelukhin (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-8089?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Shelukhin reopened HIVE-8089:
------------------------------------

> 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



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