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

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.12.0
• Assignee: Unassigned
• Reporter: lingjie.shu
• Created: 14/Nov/13 01:12
• Updated: 11/Dec/13 02:23

Description

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)