[jira] [Commented] (SPARK-29178) Improve shown message on sql show()

["Hyukjin Kwon (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-29178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16936772#comment-16936772 ] 

Hyukjin Kwon commented on SPARK-29178:
--------------------------------------

In order to do that it requires to count all records whereas it can only read first 20 rows in the current way. I don't think we should do it.

> Improve shown message on sql show()
> -----------------------------------
>
>                 Key: SPARK-29178
>                 URL: https://issues.apache.org/jira/browse/SPARK-29178
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Tomoko Komiyama
>            Priority: Minor
>
> Add to show total rows with Date Frame table in Dataset.scala(sql/core/src/main/scala/org/apache/spark/sql/).
>  
> [ Before ]
> {code:java}
> |2019/8/18|  sunny|       27.2|
> |2019/8/19|  sunny|       28.6|
> |2019/8/20|  rainy|       27.6|
> +---------+-------+-----------+
> only showing top 20 rows
> {code}
>  
> [ After ]
> {code:java}
> |2019/8/18|  sunny|       27.2|
> |2019/8/19|  sunny|       28.6|
> |2019/8/20|  rainy|       27.6|
> +---------+-------+-----------+
> only showing top 20 / 31 rows
> {code}
>  



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