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From "He Yongqiang (JIRA)" <>
Subject [jira] Updated: (HIVE-675) add database/scheme support Hive QL
Date Mon, 21 Sep 2009 14:18:16 GMT


He Yongqiang updated HIVE-675:

    Attachment: hive-675-2009-9-21.patch

>>What is the reason for not using a default path (<hive.root>/dbname) if location
argument is null? It is possible that tools other than Hive CLI can create databases and they
don't necessarily know what is the default path should be.
At the first try of implementing this feature, i thought it's not a good idea to host other
database in the default db's directory (i did not know that the default db can not be drop
at that time).  So hive-675-2009-9-21.patch removed the constrain of must specifying a location.
And also added "create database" testcase in positive cli test as Namit suggested in an earlier
Thanks Prasad and Namit!

> add database/scheme support Hive QL
> -----------------------------------
>                 Key: HIVE-675
>                 URL:
>             Project: Hadoop Hive
>          Issue Type: New Feature
>          Components: Query Processor
>            Reporter: Prasad Chakka
>            Assignee: He Yongqiang
>         Attachments: hive-675-2009-9-16.patch, hive-675-2009-9-19.patch, hive-675-2009-9-21.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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