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From "JaeHwa Jung (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-289) HCatalogStore
Date Tue, 05 Nov 2013 07:32:18 GMT

    [ https://issues.apache.org/jira/browse/TAJO-289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13813718#comment-13813718
] 

JaeHwa Jung commented on TAJO-289:
----------------------------------

Thanks Jihoon.

I think that Catalog Federation supports users to analyze Hive tables and Tajo tables simultaneously.
But as I mentioned to you at [TAJO-298|https://issues.apache.org/jira/browse/TAJO-298], we
will discuss Catalog Federation fully. 

Anyway, I'm going to implement HCatalogStore and some interfaces to integrate with Hive metastore.
First, I'll develop HCatalogStore to support SELECT FROM query. And I'll develop interfaces
to support another query type at another issue.


> HCatalogStore
> -------------
>
>                 Key: TAJO-289
>                 URL: https://issues.apache.org/jira/browse/TAJO-289
>             Project: Tajo
>          Issue Type: Sub-task
>          Components: catalog
>    Affects Versions: 0.8-incubating
>            Reporter: JaeHwa Jung
>            Assignee: JaeHwa Jung
>             Fix For: 0.8-incubating
>
>
> I designed Tajo to use Hive metastore with HCatalog.
> In this case, Tajo has to have an interface to connect to HCatalog.
> And I think that this connect is very useful to connect to another catalogs as follows:
>  some different Hive catalogs, HBase catalogs
> So, I named this interface as CatalogDriver. It will has some properties as follows:
> - catalog namespace name
> - catalog URI
> - catalog driver class



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