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From "Jinfeng Ni (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-3621) Wrong results when Drill on Hbase query contains rowkey "or" or "IN"
Date Wed, 12 Aug 2015 22:21:46 GMT

     [ https://issues.apache.org/jira/browse/DRILL-3621?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jinfeng Ni updated DRILL-3621:
------------------------------
    Fix Version/s: 1.2.0

> Wrong results when Drill on Hbase query contains rowkey "or" or "IN"
> --------------------------------------------------------------------
>
>                 Key: DRILL-3621
>                 URL: https://issues.apache.org/jira/browse/DRILL-3621
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>    Affects Versions: 1.1.0
>            Reporter: Hao Zhu
>            Assignee: Jinfeng Ni
>            Priority: Critical
>             Fix For: 1.2.0
>
>         Attachments: 0001-DRILL-3621-Fix-incorrect-result-if-HBase-filter-cont.patch
>
>
> If Drill on Hbase query contains row_key "in" or "or", it produces wrong results.
> For example:
> 1. Create a hbase table
> {code}
> create 'testrowkey','cf'
> put 'testrowkey','DUMMY1','cf:c','value1'
> put 'testrowkey','DUMMY2','cf:c','value2'
> put 'testrowkey','DUMMY3','cf:c','value3'
> put 'testrowkey','DUMMY4','cf:c','value4'
> put 'testrowkey','DUMMY5','cf:c','value5'
> put 'testrowkey','DUMMY6','cf:c','value6'
> put 'testrowkey','DUMMY7','cf:c','value7'
> put 'testrowkey','DUMMY8','cf:c','value8'
> put 'testrowkey','DUMMY9','cf:c','value9'
> put 'testrowkey','DUMMY10','cf:c','value10'
> {code}
> 2. Drill queries:
> {code}
> 0: jdbc:drill:zk=h2.poc.com:5181,h3.poc.com:5> SELECT CONVERT_FROM(ROW_KEY,'UTF8')
RK FROM hbase.testrowkey T WHERE ROW_KEY = 'DUMMY10';
> +----------+
> |    RK    |
> +----------+
> | DUMMY10  |
> +----------+
> 1 row selected (1.186 seconds)
> 0: jdbc:drill:zk=h2.poc.com:5181,h3.poc.com:5> SELECT CONVERT_FROM(ROW_KEY,'UTF8')
RK FROM hbase.testrowkey T WHERE ROW_KEY = 'DUMMY1';
> +---------+
> |   RK    |
> +---------+
> | DUMMY1  |
> +---------+
> 1 row selected (0.691 seconds)
> 0: jdbc:drill:zk=h2.poc.com:5181,h3.poc.com:5> SELECT CONVERT_FROM(ROW_KEY,'UTF8')
RK FROM hbase.testrowkey T WHERE ROW_KEY IN ('DUMMY1' , 'DUMMY10');
> +---------+
> |   RK    |
> +---------+
> | DUMMY1  |
> +---------+
> 1 row selected (0.71 seconds)
> 0: jdbc:drill:zk=h2.poc.com:5181,h3.poc.com:5> SELECT CONVERT_FROM(ROW_KEY,'UTF8')
RK FROM hbase.testrowkey T WHERE ROW_KEY ='DUMMY1' OR ROW_KEY = 'DUMMY10';
> +---------+
> |   RK    |
> +---------+
> | DUMMY1  |
> +---------+
> 1 row selected (0.693 seconds)
> {code}
> From explain plan, filter is pushed down to hbase scan layer.
> {code}
> 0: jdbc:drill:zk=h2.poc.com:5181,h3.poc.com:5> explain plan for SELECT CONVERT_FROM(ROW_KEY,'UTF8')
RK FROM hbase.testrowkey T WHERE ROW_KEY IN ('DUMMY1' , 'DUMMY10');
> +------+------+
> | text | json |
> +------+------+
> | 00-00    Screen
> 00-01      Project(RK=[CONVERT_FROMUTF8($0)])
> 00-02        Scan(groupscan=[HBaseGroupScan [HBaseScanSpec=HBaseScanSpec [tableName=testrowkey,
startRow=DUMMY1, stopRow=DUMMY10, filter=null], columns=[`row_key`]]])
>  |
> {code}



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