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https://issues.apache.org/jira/browse/HIVE-1918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12992036#comment-12992036
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Krishna Kumar commented on HIVE-1918:
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Thanks, Namit, for the comments.
1. Ok re moving serialization/deserialization methods to EximUtil, but did not
understand the first part. Are you suggesting moving EximUtil,
ImportSemanticAnalyzer and ExportSemanticAnalyzer to a new package? Does not
seem to warrant it; today all parsing/semantic analysis classes are in
o.a.h.h.ql.parse package...
2. You mean Hive.java's API? The existing first createPartition remains as it
is, the second createPartition used in DDLTasek is changing to allow the
creation of a partition with all the partition-specific configurations. Since
AddPartitionDesc is initialized with nulls/-1 for these extra parameters, the
existing behaviour is not altered.
3. Can you expand a little? What are inputs/outputs (classes?, tables?) - if
they are part of the existing object model/data model, I think they are
exported and imported.
> 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
> Assignee: Krishna Kumar
> Attachments: HIVE-1918.patch.1.txt, HIVE-1918.patch.2.txt,
> HIVE-1918.patch.3.txt, HIVE-1918.patch.txt, hive-metastore-er.pdf
>
>
> 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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