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From "chenerlu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CARBONDATA-995) Incorrect result displays while using variance aggregate function in presto integration
Date Thu, 29 Jun 2017 09:35:00 GMT

    [ https://issues.apache.org/jira/browse/CARBONDATA-995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16068075#comment-16068075
] 

chenerlu commented on CARBONDATA-995:
-------------------------------------

Hi, What is behave of same operation in hive ?

> Incorrect result displays while using variance aggregate function in presto integration
> ---------------------------------------------------------------------------------------
>
>                 Key: CARBONDATA-995
>                 URL: https://issues.apache.org/jira/browse/CARBONDATA-995
>             Project: CarbonData
>          Issue Type: Bug
>          Components: data-query, presto-integration
>    Affects Versions: 1.1.0
>         Environment: spark 2.1 , presto 0.166
>            Reporter: Vandana Yadav
>            Priority: Minor
>         Attachments: 2000_UniqData.csv
>
>
> Incorrect result displays while using variance aggregate function in presto integration
> Steps to reproduce :
> 1. In CarbonData:
> a) Create table:
> CREATE TABLE uniqdata (CUST_ID int,CUST_NAME String,ACTIVE_EMUI_VERSION string, DOB timestamp,
DOJ timestamp, BIGINT_COLUMN1 bigint,BIGINT_COLUMN2 bigint,DECIMAL_COLUMN1 decimal(30,10),
DECIMAL_COLUMN2 decimal(36,10),Double_COLUMN1 double, Double_COLUMN2 double,INTEGER_COLUMN1
int) STORED BY 'org.apache.carbondata.format' TBLPROPERTIES ("TABLE_BLOCKSIZE"= "256 MB");
> b) Load data : 
> LOAD DATA INPATH 'hdfs://localhost:54310/2000_UniqData.csv' into table uniqdata OPTIONS('DELIMITER'=','
, 'QUOTECHAR'='"','BAD_RECORDS_ACTION'='FORCE','FILEHEADER'='CUST_ID,CUST_NAME,ACTIVE_EMUI_VERSION,DOB,DOJ,BIGINT_COLUMN1,BIGINT_COLUMN2,DECIMAL_COLUMN1,DECIMAL_COLUMN2,Double_COLUMN1,Double_COLUMN2,INTEGER_COLUMN1');
> 2. In presto 
> a) Execute the query:
> select variance(DECIMAL_COLUMN1) as a   from (select DECIMAL_COLUMN1 from UNIQDATA order
by DECIMAL_COLUMN1) t
> Actual result :
> In CarbonData :
> "+--------------------+--+
> |         a          |
> +--------------------+--+
> | 333832.4983039884  |
> +--------------------+--+
> 1 row selected (0.695 seconds)
> "
> in presto:
> "         a         
> -------------------
>  333832.3010442859 
> (1 row)
> Query 20170420_082837_00062_hd7jy, FINISHED, 1 node
> Splits: 35 total, 35 done (100.00%)
> 0:00 [2.01K rows, 1.97KB] [8.09K rows/s, 7.91KB/s]"
> Expected result: it should display the same result as showing in CarbonData.



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