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https://issues.apache.org/jira/browse/HBASE-2220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack resolved HBASE-2220.
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Resolution: Fixed
Fix Version/s: 0.21.0
0.20.4
Hadoop Flags: [Reviewed]
Applied patch to branch and trunk. Thank you Bruno.
> Add a binary comparator that only compares up to the length of the supplied
> byte array
> --------------------------------------------------------------------------------------
>
> Key: HBASE-2220
> URL: https://issues.apache.org/jira/browse/HBASE-2220
> Project: Hadoop HBase
> Issue Type: New Feature
> Components: filters
> Reporter: Bruno Dumon
> Priority: Minor
> Fix For: 0.20.4, 0.21.0
>
> Attachments: binary-prefix-comparator-patch.txt
>
>
> This new comparator is similar to the existing BinaryComparator, but only
> compares up to the length of the supplied byte array.
> The use-case I need this for is secondary indexes. I build a table where the
> row keys have the form {value}{row key}, where {value} is a fixed length byte
> array. On this index table I then would like to perform range scans on just
> the fixed length {value} part. The BinaryPrefixComparator supplied in this
> patch enables exactly this, when used in combination with the RowFilter.
> See also mail at
> http://mail-archives.apache.org/mod_mbox/hadoop-hbase-user/201002.mbox/%[email protected]%3e
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