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From "Xiao Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-22359) Improve the test coverage of window functions
Date Thu, 14 Dec 2017 00:43:15 GMT

    [ https://issues.apache.org/jira/browse/SPARK-22359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16290159#comment-16290159
] 

Xiao Li commented on SPARK-22359:
---------------------------------

https://github.com/postgrespro/postgrespro/blob/ac92c4a9a53c88843533154d2224323509134323/src/test/regress/sql/window.sql

Above link has a few good examples.

> Improve the test coverage of window functions
> ---------------------------------------------
>
>                 Key: SPARK-22359
>                 URL: https://issues.apache.org/jira/browse/SPARK-22359
>             Project: Spark
>          Issue Type: Test
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Jiang Xingbo
>
> There are already quite a few integration tests using window functions, but the unit
tests coverage for window funtions is not ideal.
> We'd like to test the following aspects:
> * Specifications
> ** different partition clauses (none, one, multiple)
> ** different order clauses (none, one, multiple, asc/desc, nulls first/last)
> * Frames and their combinations
> ** OffsetWindowFunctionFrame
> ** UnboundedWindowFunctionFrame
> ** SlidingWindowFunctionFrame
> ** UnboundedPrecedingWindowFunctionFrame
> ** UnboundedFollowingWindowFunctionFrame
> * Aggregate function types
> ** Declarative
> ** Imperative
> ** UDAF
> * Spilling
> ** Cover the conditions that WindowExec should spill at least once 



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