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https://issues.apache.org/jira/browse/CASSANDRA-2245?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mck SembWever resolved CASSANDRA-2245.
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Resolution: Duplicate
As far as i understand CASSANDRA-1125 covers your needs.
> Enable map reduce to use indexes for ColumnFamilyInputFormat
> ------------------------------------------------------------
>
> Key: CASSANDRA-2245
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2245
> Project: Cassandra
> Issue Type: Improvement
> Components: Hadoop
> Affects Versions: 0.7.2
> Environment: Cassandra 0.7 or later and Hadoop 0.20.1 or later
> Reporter: Matt Kennedy
> Priority: Minor
> Labels: hadoop
> Fix For: 0.8
>
> Original Estimate: 72h
> Remaining Estimate: 72h
>
> Enable the ability to run a MapReduce job that takes a value in an indexed
> column as a parameter, and use that to select the data that the MapReduce job
> operates on. Right now, it looks like this isn't possible because
> org.apache.cassandra.hadoop.ColumnFamilyRecordReader will only fetch data
> with get_range_slices, not get_indexed_slices.
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