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https://issues.apache.org/jira/browse/DRILL-3621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14680800#comment-14680800
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Jinfeng Ni edited comment on DRILL-3621 at 8/10/15 9:34 PM:
------------------------------------------------------------
I think the incorrect query result is caused by the fact that HBaseScanSpec's
stopRow is exclusive, not inclusive. The stopRow should be some value which is
larger than "DUMMY10".
{code}
public Scan(byte[] startRow,
byte[] stopRow)
Create a Scan operation for the range of rows specified.
Parameters:
startRow - row to start scanner at or after (inclusive)
stopRow - row to stop scanner before (exclusive)
{code}
was (Author: jni):
I think the incorrect query result is caused by the fact that HBaseScanSpec's
stopRow is exclusive, not inclusive. The stopRow should be some value which is
larger than "DUMMY10".
public Scan(byte[] startRow,
byte[] stopRow)
Create a Scan operation for the range of rows specified.
Parameters:
startRow - row to start scanner at or after (inclusive)
stopRow - row to stop scanner before (exclusive)
> 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: Chris Westin
> Priority: Critical
>
> 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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