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From "Peter Vary (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-20079) Populate more accurate rawDataSize for parquet format
Date Mon, 25 Feb 2019 10:44:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-20079?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16776738#comment-16776738
] 

Peter Vary commented on HIVE-20079:
-----------------------------------

+1

> Populate more accurate rawDataSize for parquet format
> -----------------------------------------------------
>
>                 Key: HIVE-20079
>                 URL: https://issues.apache.org/jira/browse/HIVE-20079
>             Project: Hive
>          Issue Type: Improvement
>          Components: File Formats
>    Affects Versions: 2.0.0
>            Reporter: Aihua Xu
>            Assignee: Antal Sinkovits
>            Priority: Major
>         Attachments: HIVE-20079.1.patch, HIVE-20079.2.patch, HIVE-20079.3.patch, HIVE-20079.4.patch,
HIVE-20079.5.patch, HIVE-20079.6.patch
>
>
> Run the following queries and you will see the raw data for the table is 4 (that is the
number of fields) incorrectly. We need to populate correct data size so data can be split
properly.
> {noformat}
> SET hive.stats.autogather=true;
> CREATE TABLE parquet_stats (id int,str string) STORED AS PARQUET;
> INSERT INTO parquet_stats values(0, 'this is string 0'), (1, 'string 1');
> DESC FORMATTED parquet_stats;
> {noformat}
> {noformat}
> Table Parameters:
> 	COLUMN_STATS_ACCURATE	true
> 	numFiles            	1
> 	numRows             	2
> 	rawDataSize         	4
> 	totalSize           	373
> 	transient_lastDdlTime	1530660523
> {noformat}



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