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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2021/03/19 19:32:00 UTC
[jira] [Assigned] (SPARK-34775) Push down limit through window when
partitionSpec is not empty
[ https://issues.apache.org/jira/browse/SPARK-34775?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-34775:
------------------------------------
Assignee: (was: Apache Spark)
> Push down limit through window when partitionSpec is not empty
> --------------------------------------------------------------
>
> Key: SPARK-34775
> URL: https://issues.apache.org/jira/browse/SPARK-34775
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Yuming Wang
> Priority: Major
>
> For example:
> {code:sql}
> SELECT *, ROW_NUMBER() OVER(PARTITION BY a ORDER BY b) AS rn FROM t LIMIT 10 ==>
> SELECT *, ROW_NUMBER() OVER(PARTITION BY a ORDER BY b) AS rn FROM (SELECT * FROM t ORDER BY a, b LIMIT 10) tmp
> {code}
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