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From "Sushanth Sowmyan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4331) Integrated StorageHandler for Hive and HCat using the HiveStorageHandler
Date Mon, 26 Aug 2013 18:29:58 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13750371#comment-13750371
] 

Sushanth Sowmyan commented on HIVE-4331:
----------------------------------------

I left some more comments on the hive patch phabricator review. Apart from a couple of minor
code-style comments, the majority of my feeling about this is that I'm okay with what HivePTOF
is doing, and it's a good first step, and I will +1 it, but I think that it does not go far
enough along to address being able to use any generic MR OutputFormat with hive. That said,
I agree that that would not really be possible unless we plumb out how HiveOutputFormat is
used itself, and I'm not completely certain people have a need for that.
                
> Integrated StorageHandler for Hive and HCat using the HiveStorageHandler
> ------------------------------------------------------------------------
>
>                 Key: HIVE-4331
>                 URL: https://issues.apache.org/jira/browse/HIVE-4331
>             Project: Hive
>          Issue Type: Task
>          Components: HCatalog
>    Affects Versions: 0.11.0, 0.12.0
>            Reporter: Ashutosh Chauhan
>            Assignee: Viraj Bhat
>         Attachments: HIVE4331_07-17.patch, StorageHandlerDesign_HIVE4331.pdf
>
>
> 1) Deprecate the HCatHBaseStorageHandler and "RevisionManager" from HCatalog. These will
now continue to function but internally they will use the "DefaultStorageHandler" from Hive.
They will be removed in future release of Hive.
> 2) Design a HivePassThroughFormat so that any new StorageHandler in Hive will bypass
the HiveOutputFormat. We will use this class in Hive's "HBaseStorageHandler" instead of the
"HiveHBaseTableOutputFormat".
> 3) Write new unit tests in the HCat's "storagehandler" so that systems such as Pig and
Map Reduce can use the Hive's "HBaseStorageHandler" instead of the "HCatHBaseStorageHandler".
> 4) Make sure all the old and new unit tests pass without backward compatibility (except
known issues as described in the Design Document).
> 5) Replace all instances of the HCat source code, which point to "HCatStorageHandler"
to use the"HiveStorageHandler" including the "FosterStorageHandler".
> I have attached the design document for the same and will attach a patch to this Jira.

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