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https://issues.apache.org/jira/browse/HIVE-1918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12985814#action_12985814
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Namit Jain commented on HIVE-1918:
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@Krishna
1. How is it different from running multiple tests currently - the output files
are generated in
build/ql/.... directory under the hive installation. Similarly, you can create
a new directory under build.
This should be definitely done in this patch itself.
2. Load does not do any checking - not does it perform any metadata operation.
The table already exists,
and load is merely a helper function. Since import is touching both data and
metadata, it makes sense
to validate the data (atleast optionally) - but that can always be done in a
follow-up.
> 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.1.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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