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https://issues.apache.org/jira/browse/HADOOP-2395?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Duxbury updated HADOOP-2395:
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Attachment: 2395.patch
Here's a patch. It adds the needed shell command implementation and modifies
HBaseAdmin, HMaster, HMasterInterface to add the needed modifyColumn method.
> [hbase] Implement "ALTER TABLE ... CHANGE column" operation
> -----------------------------------------------------------
>
> Key: HADOOP-2395
> URL: https://issues.apache.org/jira/browse/HADOOP-2395
> Project: Hadoop
> Issue Type: Improvement
> Components: contrib/hbase
> Reporter: Bryan Duxbury
> Assignee: Bryan Duxbury
> Attachments: 2395.patch
>
>
> Right now, you can add or delete column families, but not change them once
> they are created. This is really inconvenient for things like adding
> compression or bloom filters to a column family once you get going. As new
> people come to HBase, they're going to make schema decisions that are
> incorrect and will need a way to modify their tables, so this is an important
> new feature.
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