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

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

lingjie.shu created HIVE-5818:
---------------------------------

             Summary: 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


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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