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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2020/10/18 15:21:00 UTC

[jira] [Commented] (SPARK-33177) CollectList and CollectSet should not be nullable

    [ https://issues.apache.org/jira/browse/SPARK-33177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17216275#comment-17216275 ] 

Apache Spark commented on SPARK-33177:
--------------------------------------

User 'tanelk' has created a pull request for this issue:
https://github.com/apache/spark/pull/30087

> CollectList and CollectSet should not be nullable
> -------------------------------------------------
>
>                 Key: SPARK-33177
>                 URL: https://issues.apache.org/jira/browse/SPARK-33177
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.1.0
>            Reporter: Tanel Kiis
>            Priority: Minor
>
> CollectList and CollectSet SQL expressions never return null value. Marking them as non-nullable can have some performance benefits, because some optimizer rules apply only to non-nullable expressions



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