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Posted to common-dev@hadoop.apache.org by "Raghotham Murthy (JIRA)" <ji...@apache.org> on 2008/11/10 09:36:44 UTC
[jira] Updated: (HADOOP-4101) Support JDBC connections for
interoperability between Hive and RDBMS
[ 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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