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From "Dmitry Tolpeko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-17253) Adding SUMMARY statement to HPL/SQL
Date Sun, 24 Sep 2017 20:59:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-17253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16178365#comment-16178365
] 

Dmitry Tolpeko commented on HIVE-17253:
---------------------------------------

Committed the patch. The SUMMARY statement can output summary based on a custom query, but
I agree later we can utilize metastore stats to speed up the statement execution.  

> Adding SUMMARY statement to HPL/SQL
> -----------------------------------
>
>                 Key: HIVE-17253
>                 URL: https://issues.apache.org/jira/browse/HIVE-17253
>             Project: Hive
>          Issue Type: Improvement
>          Components: hpl/sql
>            Reporter: Dmitry Tolpeko
>            Assignee: Dmitry Tolpeko
>             Fix For: 3.0.0
>
>         Attachments: HIVE-17253.1.patch
>
>
> Adding SUMMARY statement to HPL/SQL to describe a data set (table, query result) similar
to Python and R.
> For each column output the data type, number of distinct values, non-NULL rows, mean,
std, percentiles, min, max. Output additional stats for categorical columns. This helps perform
quick and easy exploratory data analysis for SQL devs and business users.  http://hplsql.org/summary



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