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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-7248) UNION ALL in hive returns incorrect results on Hbase backed table
Date Mon, 14 Jul 2014 12:07:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-7248?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14060582#comment-14060582
] 

Hive QA commented on HIVE-7248:
-------------------------------



{color:red}Overall{color}: -1 at least one tests failed

Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12655505/HIVE-7248.1.patch.txt

{color:red}ERROR:{color} -1 due to 2 failed/errored test(s), 5730 tests executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver_index_auto_self_join
org.apache.hadoop.hive.cli.TestMinimrCliDriver.testCliDriver_ql_rewrite_gbtoidx
{noformat}

Test results: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-Build/776/testReport
Console output: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-Build/776/console
Test logs: http://ec2-174-129-184-35.compute-1.amazonaws.com/logs/PreCommit-HIVE-Build-776/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 2 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12655505

> UNION ALL in hive returns incorrect results on Hbase backed table
> -----------------------------------------------------------------
>
>                 Key: HIVE-7248
>                 URL: https://issues.apache.org/jira/browse/HIVE-7248
>             Project: Hive
>          Issue Type: Bug
>          Components: HBase Handler
>    Affects Versions: 0.12.0, 0.13.0, 0.13.1
>            Reporter: Mala Chikka Kempanna
>            Assignee: Navis
>         Attachments: HIVE-7248.1.patch.txt
>
>
> The issue can be recreated with following steps
> 1) In hbase 
> create 'TABLE_EMP','default' 
> 2) On hive 
> sudo -u hive hive 
> CREATE EXTERNAL TABLE TABLE_EMP(FIRST_NAME string,LAST_NAME string,CDS_UPDATED_DATE string,CDS_PK
string) STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler' WITH SERDEPROPERTIES("hbase.columns.mapping"
= "default:FIRST_NAME,default:LAST_NAME,default:CDS_UPDATED_DATE,:key", "hbase.scan.cache"
= "500", "hbase.scan.cacheblocks" = "false" ) TBLPROPERTIES("hbase.table.name" = "TABLE_EMP",'serialization.null.format'='');

> 3) On hbase insert the following data 
> put 'TABLE_EMP', '1', 'default:FIRST_NAME', 'Srini' 
> put 'TABLE_EMP', '1', 'default:LAST_NAME', 'P' 
> put 'TABLE_EMP', '1', 'default:CDS_UPDATED_DATE', '2014-06-16 00:00:00' 
> put 'TABLE_EMP', '2', 'default:FIRST_NAME', 'Aravind' 
> put 'TABLE_EMP', '2', 'default:LAST_NAME', 'K' 
> put 'TABLE_EMP', '2', 'default:CDS_UPDATED_DATE', '2014-06-16 00:00:00' 
> 4) On hive execute the following query 
> hive 
> SELECT * 
> FROM ( 
> SELECT CDS_PK 
> FROM TABLE_EMP 
> WHERE 
> CDS_PK >= '0' 
> AND CDS_PK <= '9' 
> AND CDS_UPDATED_DATE IS NOT NULL 
> UNION ALL SELECT CDS_PK 
> FROM TABLE_EMP 
> WHERE 
> CDS_PK >= 'a' 
> AND CDS_PK <= 'z' 
> AND CDS_UPDATED_DATE IS NOT NULL 
> )t ; 
> 5) Output of the query 
> 1 
> 1 
> 2 
> 2 
> 6) Output of just 
> SELECT CDS_PK 
> FROM TABLE_EMP 
> WHERE 
> CDS_PK >= '0' 
> AND CDS_PK <= '9' 
> AND CDS_UPDATED_DATE IS NOT NULL 
> is 
> 1 
> 2 
> 7) Output of just 
> SELECT CDS_PK 
> FROM TABLE_EMP 
> WHERE 
> CDS_PK >= 'a' 
> AND CDS_PK <= 'z' 
> AND CDS_UPDATED_DATE IS NOT NULL 
> Empty 
> 8) UNION is used to combine the result from multiple SELECT statements into a single
result set. Hive currently only supports UNION ALL (bag union), in which duplicates are not
eliminated 
> Accordingly above query should return output 
> 1 
> 2 
> instead it is giving wrong output 
> 1 
> 1 
> 2 
> 2



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