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https://issues.apache.org/jira/browse/SPARK-22360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16332762#comment-16332762
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Jiang Xingbo commented on SPARK-22360:
--------------------------------------

Sorry for late response. It's great that we can cover the DataFrame test cases, 
I really think we should have them soon. Besides, we should also cover the 
window sql interface, example in 
`sql/core/src/test/resources/sql-tests/inputs/window.sql`, it should also be 
funny to see whether we can generate consistent results for window tests in 
other major databases.

[~smilegator] WDYT?

> Add unit test for Window Specifications
> ---------------------------------------
>
>                 Key: SPARK-22360
>                 URL: https://issues.apache.org/jira/browse/SPARK-22360
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Jiang Xingbo
>            Priority: Major
>
> * different partition clauses (none, one, multiple)
> * different order clauses (none, one, multiple, asc/desc, nulls first/last)



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