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Date: Tue, 7 Jul 2009 23:30:15 -0700 (PDT)
From: "Jonathan Gray (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Commented: (HBASE-1622) Make KeyValue implement the
 Comparable interface to make it work with Cascading.
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    [ https://issues.apache.org/jira/browse/HBASE-1622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12728530#action_12728530 ] 

Jonathan Gray commented on HBASE-1622:
--------------------------------------

How would the KV know it's comparator?  Needs to be lightweight.

Maybe we should have KeyValueComparable or something if we are going to end up extending KV in otherwise unnecessary ways (or more importantly, ways that might lead to misuse in other places).  Would just extend KV and add Comparable interface... we could even optionally pass in comparator on instantiation.

Might do the same for Result?  I hate to add more classes, especially with long names... just thinking.

> Make KeyValue implement the Comparable interface to make it work with Cascading.
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-1622
>                 URL: https://issues.apache.org/jira/browse/HBASE-1622
>             Project: Hadoop HBase
>          Issue Type: New Feature
>    Affects Versions: 0.20.0
>            Reporter: Erik Holstad
>            Assignee: Erik Holstad
>            Priority: Minor
>             Fix For: 0.20.0
>
>         Attachments: HBASE-1622-v1.patch, HBASE-1622-v2.patch
>
>
> As with making Result implement the Comparable interface, this is used for making HBase interact tightly with cascading, so that KeyValues can be put into Tuples.

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