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From Michael Bigby <mbi...@bluekai.com>
Subject Re: [jira] Updated: (PIG-993) [zebra] Abitlity to drop a column group in a table
Date Sat, 03 Oct 2009 02:16:35 GMT


----- Original Message -----
From: Yan Zhou (JIRA) <jira@apache.org>
To: pig-dev@hadoop.apache.org <pig-dev@hadoop.apache.org>
Sent: Fri Oct 02 18:16:23 2009
Subject: [jira] Updated: (PIG-993) [zebra] Abitlity to drop a column group in a table


     [ https://issues.apache.org/jira/browse/PIG-993?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yan Zhou updated PIG-993:
-------------------------

    Attachment: zebra-drop-cg.patch

This patych should be applied after the patch for Jira992 is applied.

> [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, 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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