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https://issues.apache.org/jira/browse/HIVE-675?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12758263#action_12758263
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He Yongqiang commented on HIVE-675:
-----------------------------------
>>Do you want to check for the existence of the location while creating a
>>database - do we want to throw an error if it already exists.
Currently, it will not throw any error if the database dir is already there. I
think this is the same as creating table. And i always do "drop table" and
"create table" stuff, and i can switch machines, and only need to redo the
"create table ..." and the data is available. I think this is very useful.
>>in create_db_bad_location, can you throw a more meaningful error - location
>>is bad or something like that
Actually i already throw an exception with msg "Database location must be an
absolute URI.". But i think the error msg "FAILED: Unknown exception : null" is
not unique to this, and i think it has been reported somewhere in mailist or a
jira page.
> 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-675-2009-9-19.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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