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From "Pengcheng Xiong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12661) StatsSetupConst.COLUMN_STATS_ACCURATE is not used correctly
Date Fri, 15 Jan 2016 21:30:39 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15102488#comment-15102488
] 

Pengcheng Xiong commented on HIVE-12661:
----------------------------------------

more golden file changes.

> StatsSetupConst.COLUMN_STATS_ACCURATE is not used correctly
> -----------------------------------------------------------
>
>                 Key: HIVE-12661
>                 URL: https://issues.apache.org/jira/browse/HIVE-12661
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>         Attachments: HIVE-12661.01.patch, HIVE-12661.02.patch, HIVE-12661.03.patch, HIVE-12661.04.patch,
HIVE-12661.05.patch, HIVE-12661.06.patch, HIVE-12661.07.patch, HIVE-12661.08.patch, HIVE-12661.09.patch,
HIVE-12661.10.patch, HIVE-12661.11.patch, HIVE-12661.12.patch
>
>
> PROBLEM:
> Hive stats are autogathered properly till an 'analyze table [tablename] compute statistics
for columns' is run. Then it does not auto-update the stats till the command is run again.
repo:
> {code}
> set hive.stats.autogather=true; 
> set hive.stats.atomic=false ; 
> set hive.stats.collect.rawdatasize=true ; 
> set hive.stats.collect.scancols=false ; 
> set hive.stats.collect.tablekeys=false ; 
> set hive.stats.fetch.column.stats=true; 
> set hive.stats.fetch.partition.stats=true ; 
> set hive.stats.reliable=false ; 
> set hive.compute.query.using.stats=true; 
> CREATE TABLE `default`.`calendar` (`year` int) ROW FORMAT SERDE 'org.apache.hadoop.hive.ql.io.orc.OrcSerde'
STORED AS INPUTFORMAT 'org.apache.hadoop.hive.ql.io.orc.OrcInputFormat' OUTPUTFORMAT 'org.apache.hadoop.hive.ql.io.orc.OrcOutputFormat'
TBLPROPERTIES ( 'orc.compress'='NONE') ; 
> insert into calendar values (2010), (2011), (2012); 
> select * from calendar; 
> +----------------+--+ 
> | calendar.year | 
> +----------------+--+ 
> | 2010 | 
> | 2011 | 
> | 2012 | 
> +----------------+--+ 
> select max(year) from calendar; 
> | 2012 | 
> insert into calendar values (2013); 
> select * from calendar; 
> +----------------+--+ 
> | calendar.year | 
> +----------------+--+ 
> | 2010 | 
> | 2011 | 
> | 2012 | 
> | 2013 | 
> +----------------+--+ 
> select max(year) from calendar; 
> | 2013 | 
> insert into calendar values (2014); 
> select max(year) from calendar; 
> | 2014 |
> analyze table calendar compute statistics for columns;
> insert into calendar values (2015);
> select max(year) from calendar;
> | 2014 |
> insert into calendar values (2016), (2017), (2018);
> select max(year) from calendar;
> | 2014  |
> analyze table calendar compute statistics for columns;
> select max(year) from calendar;
> | 2018  |
> {code}



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