[jira] [Commented] (HIVE-5818) When group by a partition column, it will occur an empty path

["Navis (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-5818?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13845000#comment-13845000 ] 

Navis commented on HIVE-5818:
-----------------------------

Cannot reproduce on trunk. I've seen issues related to this but cannot remember.

> When group by a partition column, it will occur an empty path
> -------------------------------------------------------------
>
>                 Key: HIVE-5818
>                 URL: https://issues.apache.org/jira/browse/HIVE-5818
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.12.0
>            Reporter: lingjie.shu
>         Attachments: HIVE-5818.patch
>
>
> 1.Create a partition table:
> CREATE TABLE test_partition (uid BIGINT ) PARTITIONED BY (ds int); 
> 2.Load data:
> insert OVERWRITE TABLE test_partition PARTITION (ds=20081221) select foo  from pokes; 
> 3.query:
> select min(ds) from test_paritions; 
> There will be an error:
> java.lang.IllegalArgumentException: Can not create a Path from an empty string 
> at org.apache.hadoop.fs.Path.checkPathArg(Path.java:82) 
> at org.apache.hadoop.fs.Path.<init>(Path.java:90) 
> at org.apache.hadoop.hive.ql.io.HiveInputFormat$HiveInputSplit.getPath(HiveInputFormat.java:106) 
> at org.apache.hadoop.mapred.MapTask.updateJobWithSplit(MapTask.java:457) 
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:416) 
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:373) 
> at org.apache.hadoop.mapred.Child$4.run(Child.java:266) 
> at java.security.AccessController.doPrivileged(Native Method) 
> at javax.security.auth.Subject.doAs(Subject.java:396) 
> at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1113) 
> at org.apache.hadoop.mapred.Child.main(Child.java:260) 



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