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From "Raghotham Murthy (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-4101) Support JDBC connections for interoperability between Hive and RDBMS
Date Mon, 10 Nov 2008 08:36:44 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-4101?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Raghotham Murthy updated HADOOP-4101:
-------------------------------------

    Attachment: hadoop-4101.2.patch

I am not sure I understand what Ashish meant by 'inheritance in JDBC metadata calls'. The
plan is to include metastore.thrift in hive_service.thrift and then hive_service will just
forward metadata calls to the metastore code. I guess with inheritance we wouldnt have to
implement the forwarding functions. Is this what you mean Ashish?
 
And yes, we should have a single implementation of the thrift server container for HiveServer
and Metastore. JDBC would then be a wrapper on top of the thrift hive client.

update: step 4a above has been completed - can now issue queries via HiveClient and retrieve
results. HiveServer - a thrift server - actually runs the queries via ql/Driver.  I am attaching
the patch with the code for the thrift server/client.

We should meet up to figure out what the plan is for the JDBC client.

> Support JDBC connections for interoperability between Hive and RDBMS
> --------------------------------------------------------------------
>
>                 Key: HADOOP-4101
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4101
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/hive
>            Reporter: YoungWoo Kim
>            Priority: Minor
>         Attachments: hadoop-4101.1.patch, hadoop-4101.2.patch
>
>
> In many DW and BI systems, the data are stored in RDBMS for now such as oracle, mysql,
postgresql ... for reporting, charting and etc.
> It would be useful to be able to import data from RDBMS and export data to RDBMS using
JDBC connections.
> If Hive support JDBC connections, It wll be much easier to use 3rd party DW/BI tools.

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