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From "Alex Newman (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-661) Allow to specify a user supplied row key comparator for a table
Date Wed, 15 Jul 2009 22:49:14 GMT

    [ https://issues.apache.org/jira/browse/HBASE-661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12731724#action_12731724

Alex Newman commented on HBASE-661:

Does this mean this is no longer blocked?

> Allow to specify a user supplied row key comparator for a table 
> ----------------------------------------------------------------
>                 Key: HBASE-661
>                 URL: https://issues.apache.org/jira/browse/HBASE-661
>             Project: Hadoop HBase
>          Issue Type: New Feature
>          Components: client, master, regionserver
>    Affects Versions: 0.2.0
>            Reporter: Clint Morgan
>            Assignee: Clint Morgan
> Now that row keys are byte arrays, users should be able to specify a comparator at table
creation time.
> My use case for this is to implement secondary indexes. In this case, row keys for the
index tables will be constructed from an optional prefix of the original row key as well as
the content of column that is being indexed. Then the comparator will first compare based
on the key prefix, and break ties by deserializing the column values and using the deserialized
type's compareTo method.

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