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https://issues.apache.org/jira/browse/HIVE-6589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16575784#comment-16575784
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Ilkka Peltola commented on HIVE-6589:
-------------------------------------
The U-SQL language has [an example
implementation|https://msdn.microsoft.com/en-us/azure/data-lake-analytics/u-sql/input-files-u-sql#inputfilesetpath]
of this. It might be a reference implementation if that makes it easier to
start on this?
I've used the U-SQL (or rather SCOPE, which was before) and really miss that
functionality in Hive. It makes loading data into external tables and
partitioning them a great deal easier. So often data is in the format
folder/year/month/day/file.ext.
> Automatically add partitions for external tables
> ------------------------------------------------
>
> Key: HIVE-6589
> URL: https://issues.apache.org/jira/browse/HIVE-6589
> Project: Hive
> Issue Type: New Feature
> Affects Versions: 0.14.0
> Reporter: Ken Dallmeyer
> Assignee: Dharmendra Pratap Singh
> Priority: Major
>
> I have a data stream being loaded into Hadoop via Flume. It loads into a date
> partition folder in HDFS. The path looks like this:
> {code}/flume/my_data/YYYY/MM/DD/HH
> /flume/my_data/2014/03/02/01
> /flume/my_data/2014/03/02/02
> /flume/my_data/2014/03/02/03{code}
> On top of it I create an EXTERNAL hive table to do querying. As of now, I
> have to manually add partitions. What I want is for EXTERNAL tables, Hive
> should "discover" those partitions. Additionally I would like to specify a
> partition pattern so that when I query Hive will know to use the partition
> pattern to find the HDFS folder.
> So something like this:
> {code}CREATE EXTERNAL TABLE my_data (
> col1 STRING,
> col2 INT
> )
> PARTITIONED BY (
> dt STRING,
> hour STRING
> )
> LOCATION
> '/flume/mydata'
> TBLPROPERTIES (
> 'hive.partition.spec' = 'dt=$Y-$M-$D, hour=$H',
> 'hive.partition.spec.location' = '$Y/$M/$D/$H',
> );
> {code}
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