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https://issues.apache.org/jira/browse/HIVE-1918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12985556#action_12985556
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Krishna Kumar commented on HIVE-1918:
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@Edward: Both the existing data model (prettified er diagram attached) and the
object model (class org.apache.hadoop.hive.metastore.api.Partition) allow the
specification of parameters on a per-partition basis. So I am not adding new
fields to either of these models. By proposal 2 above, I will not be adding any
ctor parameters to org.apache.hadoop.hive.ql.metadata.Partition as well.
Your point re providing manageability via ddl statements to all aspects of the
data/object model is taken. But I am not adding new aspects to either model, so
if indeed we need to address current manageability gaps, should they not be
addressed via another enhancement request, rather than this one, which aims
simply to add export/import facilities?
> 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
> Attachments: HIVE-1918.patch.txt
>
>
> 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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