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