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From "Apache Spark (Jira)" <j...@apache.org>
Subject [jira] [Assigned] (SPARK-30707) Lead/Lag window function throws AnalysisException without ORDER BY clause
Date Thu, 30 Apr 2020 16:51:05 GMT

     [ https://issues.apache.org/jira/browse/SPARK-30707?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Apache Spark reassigned SPARK-30707:
------------------------------------

    Assignee: Apache Spark

> Lead/Lag window function throws AnalysisException without ORDER BY clause
> -------------------------------------------------------------------------
>
>                 Key: SPARK-30707
>                 URL: https://issues.apache.org/jira/browse/SPARK-30707
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.1.0
>            Reporter: jiaan.geng
>            Assignee: Apache Spark
>            Priority: Major
>
>  Lead/Lag window function throws AnalysisException without ORDER BY clause:
> {code:java}
> SELECT lead(ten, four + 1) OVER (PARTITION BY four), ten, four
> FROM (SELECT * FROM tenk1 WHERE unique2 < 10 ORDER BY four, ten)s
> org.apache.spark.sql.AnalysisException
> Window function lead(ten#x, (four#x + 1), null) requires window to be ordered, please
add ORDER BY clause. For example SELECT lead(ten#x, (four#x + 1), null)(value_expr) OVER (PARTITION
BY window_partition ORDER BY window_ordering) from table;
> {code}
>  
> Maybe we need fix this issue.



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