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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10114) _scan_internal() in table.rb should accept argument that specifies reverse scan
Date Tue, 10 Dec 2013 05:18:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13843957#comment-13843957
] 

Hadoop QA commented on HBASE-10114:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12617961/hbase-10114-trunk.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 3 new or modified
tests.

    {color:green}+1 hadoop1.0{color}.  The patch compiles against the hadoop 1.0 profile.

    {color:green}+1 hadoop1.1{color}.  The patch compiles against the hadoop 1.1 profile.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:red}-1 findbugs{color}.  The patch appears to introduce 2 new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines longer than 100

    {color:red}-1 site{color}.  The patch appears to cause mvn site goal to fail.

     {color:red}-1 core tests{color}.  The patch failed these unit tests:
                       org.apache.hadoop.hbase.regionserver.wal.TestLogRolling

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/8114//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8114//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8114//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8114//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8114//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8114//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8114//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8114//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8114//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8114//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/8114//console

This message is automatically generated.

> _scan_internal() in table.rb should accept argument that specifies reverse scan
> -------------------------------------------------------------------------------
>
>                 Key: HBASE-10114
>                 URL: https://issues.apache.org/jira/browse/HBASE-10114
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>             Fix For: 0.98.0, 0.99.0
>
>         Attachments: hbase-10114-trunk.patch
>
>
> Reversed Scan usage on Shell:
> hbase> scan 't1', {REVERSED => true}
> Other parameter could also be added with 'REVERSED', like LIMIT,COLUMNS.
> Examples:
> hbase(main):019:0* scan 't1'
> ROW                                      COLUMN+CELL                                
                                                                        
>  001                                     column=f1:q1, timestamp=1386644670350, value=v1
                                                                    
>  002                                     column=f1:q2, timestamp=1386644675585, value=v1
                                                                    
>  003                                     column=f1:q1, timestamp=1386644680090, value=v1
                                                                    
>  003                                     column=f1:q2, timestamp=1386644682749, value=v1
                                                                    
>  004                                     column=f1:q1, timestamp=1386644692589, value=v1
                                                                    
> 4 row(s) in 0.0130 seconds
> hbase(main):022:0> scan 't1',{REVERSED => true}
> ROW                                      COLUMN+CELL                                
                                                                        
>  004                                     column=f1:q1, timestamp=1386644692589, value=v1
                                                                    
>  003                                     column=f1:q1, timestamp=1386644680090, value=v1
                                                                    
>  003                                     column=f1:q2, timestamp=1386644682749, value=v1
                                                                    
>  002                                     column=f1:q2, timestamp=1386644675585, value=v1
                                                                    
>  001                                     column=f1:q1, timestamp=1386644670350, value=v1
   
> hbase(main):023:0> scan 't1',{REVERSED => true,COLUMNS=>'f1:q2'}
> ROW                                      COLUMN+CELL                                
                                                                        
>  003                                     column=f1:q2, timestamp=1386644682749, value=v1
                                                                    
>  002                                     column=f1:q2, timestamp=1386644675585, value=v1
                                                                    
> 2 row(s) in 0.0100 seconds
> Here is how boolean argument is accepted:
> {code}
>         cache_blocks = args["CACHE_BLOCKS"] || true
> {code}
> Flag for reverse scan should be supported in similar manner



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