spark-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-23627) Provide isEmpty() function in DataSet
Date Fri, 09 Mar 2018 06:12:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-23627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16392468#comment-16392468
] 

Apache Spark commented on SPARK-23627:
--------------------------------------

User 'goungoun' has created a pull request for this issue:
https://github.com/apache/spark/pull/20782

> Provide isEmpty() function in DataSet
> -------------------------------------
>
>                 Key: SPARK-23627
>                 URL: https://issues.apache.org/jira/browse/SPARK-23627
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core, SQL
>    Affects Versions: 2.1.0
>            Reporter: Goun Na
>            Priority: Trivial
>
> Like rdd.isEmpty, adding isEmpty to DataSet would useful. 
> Some code without isEmpty:
> {code:java}
> if (df.count = 0) { do_something }{code}
>  Some people add limit 1 for a performance reason:
> {code:java}
> if (df.limit(1).rdd.isEmpty) { do_something }
> if (df.rdd.take(1).isEmpty) { do_something }{code}
>  
> If isEmpty is provided, the code will be perfect clean:
> {code:java}
> if (df.isEmpty)  { do_something }{code}
>  
>  
>  
>  
>  
>  
>  
>  



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org


Mime
View raw message