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From "JaeHwa Jung (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-289) HCatalogStore
Date Mon, 04 Nov 2013 11:17:20 GMT

    [ https://issues.apache.org/jira/browse/TAJO-289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13812755#comment-13812755
] 

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

At first, I designed to implement a new class called as CatalogDriver. But now, I think that
it was an unnecessary class because of CatalogStore. If users want to use some db as a catalog
server, we just  have to implements CatalogStore interface. I think that HCatalog interface
is in the same way. So I will implements HCatalogStore exending AbstractDBStore. 

> 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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