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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2019/05/21 04:33:33 UTC

[jira] [Resolved] (SPARK-13336) Add non-numerical summaries to DataFrame.describe

     [ https://issues.apache.org/jira/browse/SPARK-13336?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon resolved SPARK-13336.
----------------------------------
    Resolution: Incomplete

> Add non-numerical summaries to DataFrame.describe
> -------------------------------------------------
>
>                 Key: SPARK-13336
>                 URL: https://issues.apache.org/jira/browse/SPARK-13336
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Ian Hellstrom
>            Priority: Minor
>              Labels: bulk-closed, features
>
> The DataFrame.describe method currently only returns statistics for numerical columns. It would be nice to see generic information that is non-statistical in nature yet often important to see, especially when assessing the quality of data: 
> * MIN/MAX for any column, not just numerical ones
> * (approximate) DISTINCT COUNT (or percentage of all rows or sample)
> * (approximate) NULL COUNT (or percentage of all rows or sample)
> * (approximate) MODE (i.e. most common value of all rows or sample)



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