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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-675) add database/scheme support Hive QL
Date Sat, 19 Sep 2009 01:14:16 GMT

    [ https://issues.apache.org/jira/browse/HIVE-675?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12757588#action_12757588
] 

Namit Jain commented on HIVE-675:
---------------------------------

Mostly looks good, I had some minor comments:

1. No positive test for CREATE DATEBASE
2. Instead of having a separate processor, it might be a good idea to support 'use database'
in Hive.g - in general, we are trying to add everything to Hive.g, since it will make adding
different clients easy.
3. More positive tests - the test that you mentioned in the beginning - insert into db2 while
selecting from db1 - 
4. database_test.q and database_switch_test.q seem to be the same.

> add database/scheme support Hive QL
> -----------------------------------
>
>                 Key: HIVE-675
>                 URL: https://issues.apache.org/jira/browse/HIVE-675
>             Project: Hadoop Hive
>          Issue Type: New Feature
>          Components: Query Processor
>            Reporter: Prasad Chakka
>            Assignee: He Yongqiang
>         Attachments: hive-675-2009-9-16.patch, hive-675-2009-9-7.patch, hive-675-2009-9-8.patch
>
>
> Currently all Hive tables reside in single namespace (default). Hive should support multiple
namespaces (databases or schemas) such that users can create tables in their specific namespaces.
These name spaces can have different warehouse directories (with a default naming scheme)
and possibly different properties.
> There is already some support for this in metastore but Hive query parser should have
this feature as well.

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