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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-993) [zebra] Abitlity to drop a column group in a table
Date Fri, 02 Oct 2009 23:04:24 GMT

    [ https://issues.apache.org/jira/browse/PIG-993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12761769#action_12761769
] 

Raghu Angadi commented on PIG-993:
----------------------------------

> zebra-drop-cg.patch : This patch would apply only after a patch for PIG-896.
I meant say PIG-986.


> [zebra] Abitlity to drop a column group in a table
> --------------------------------------------------
>
>                 Key: PIG-993
>                 URL: https://issues.apache.org/jira/browse/PIG-993
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Raghu Angadi
>            Assignee: Raghu Angadi
>             Fix For: 0.5.0
>
>         Attachments: DropColumnGroupExample.java, zebra-drop-cg.patch
>
>
> A Zebra table is stored as multiple sub tables each containing a set of columns called
column group (CG). The user specifies how these columns are grouped while creating a table
through the _storage hint_.
> For some of the large tables, it might be necessary for users to remove a set of columns
and retain the rest. This jira provides a way for users to delete an entire column group.

> The following comments will have more details on API and the semantics. 

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