[jira] [Assigned] (SPARK-10747) add support for window specification to include how NULLS are ordered

["Apache Spark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-10747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-10747:
------------------------------------

    Assignee: Apache Spark

> add support for window specification to include how NULLS are ordered
> ---------------------------------------------------------------------
>
>                 Key: SPARK-10747
>                 URL: https://issues.apache.org/jira/browse/SPARK-10747
>             Project: Spark
>          Issue Type: New Feature
>          Components: SQL
>    Affects Versions: 1.5.0
>            Reporter: N Campbell
>            Assignee: Apache Spark
>
> You cannot express how NULLS are to be sorted in the window order specification and have to use a compensating expression to simulate.
> Error: org.apache.spark.sql.AnalysisException: line 1:76 missing ) at 'nulls' near 'nulls'
> line 1:82 missing EOF at 'last' near 'nulls';
> SQLState:  null
> Same limitation as Hive reported in Apache JIRA HIVE-9535 )
> This fails
> select rnum, c1, c2, c3, dense_rank() over(partition by c1 order by c3 desc nulls last) from tolap
> select rnum, c1, c2, c3, dense_rank() over(partition by c1 order by case when c3 is null then 1 else 0 end) from tolap



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