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From "Krishna Kumar (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-1918) Add export/import facilities to the hive system
Date Mon, 17 Jan 2011 15:49:52 GMT
Add export/import facilities to the hive system
-----------------------------------------------

                 Key: HIVE-1918
                 URL: https://issues.apache.org/jira/browse/HIVE-1918
             Project: Hive
          Issue Type: New Feature
          Components: Query Processor
            Reporter: Krishna Kumar


This is an enhancement request to add export/import features to hive.

With this language extension, the user can export the data of the table - which may be located
in different hdfs locations in case of a partitioned table - as well as the metadata of the
table into a specified output location. This output location can then be moved over to another
different hadoop/hive instance and imported there.  

This should work independent of the source and target metastore dbms used; for instance, between
derby and mysql.

For partitioned tables, the ability to export/import a subset of the partition must be supported.

Howl will add more features on top of this: The ability to create/use the exported data even
in the absence of hive, using MR or Pig. Please see http://wiki.apache.org/pig/Howl/HowlImportExport
for these details.



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