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From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-20079) Populate more accurate rawDataSize for parquet format
Date Tue, 03 Jul 2018 23:46:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-20079?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aihua Xu updated HIVE-20079:
----------------------------
    Status: Patch Available  (was: Open)

patch-1: in ParquetRecordWriterWrapper, when the writer gets closed, we will collect and update
the stats from the file. 

> 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: Aihua Xu
>            Priority: Major
>         Attachments: HIVE-20079.1.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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