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From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-993) [zebra] Abitlity to drop a column group in a table
Date Fri, 16 Oct 2009 22:14:31 GMT

    [ https://issues.apache.org/jira/browse/PIG-993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12766732#action_12766732
] 

Alan Gates commented on PIG-993:
--------------------------------

We looked over the failure info and couldn't understand why it was failing.  I've rerun the
unit tests multiple times since and seen no issue.  We've run it on several different machines
and not seen an issue.  So I'm going to declare the test failure a fluke and commit the patch.

> [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: 0.6.0
>
>         Attachments: DropColumnGroupExample.java, TEST-org.apache.hadoop.zebra.io.TestCheckin.txt,
zebra-drop-cg.patch, zebra-drop-cg.patch, 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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