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https://issues.apache.org/jira/browse/HIVE-5818?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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lingjie.shu updated HIVE-5818:
------------------------------
Attachment: HIVE-5818.patch
> 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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