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https://issues.apache.org/jira/browse/SPARK-31512?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-31512.
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Resolution: Duplicate
> make window function using order by optional
> --------------------------------------------
>
> Key: SPARK-31512
> URL: https://issues.apache.org/jira/browse/SPARK-31512
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.5
> Environment: spark2.4.5
> hadoop2.7.7
> Reporter: philipse
> Priority: Minor
>
> Hi all
> In other sql dialect ,order by is not the must when using window function,we
> may make it pararmteterized
> the below is the case :
> *select row_number()over() from test1*
> Error: org.apache.spark.sql.AnalysisException: Window function row_number()
> requires window to be ordered, please add ORDER BY clause. For example SELECT
> row_number()(value_expr) OVER (PARTITION BY window_partition ORDER BY
> window_ordering) from table; (state=,code=0)
>
> So. i suggest make it as a choice,or we will meet the error when migrate sql
> from other dialect，such as hive
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