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https://issues.apache.org/jira/browse/CASSANDRA-2391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis resolved CASSANDRA-2391.
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Resolution: Later
> Create a LoadPushDown implementation for CassandraStorage
> ---------------------------------------------------------
>
> Key: CASSANDRA-2391
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2391
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Jeremy Hanna
> Priority: Minor
> Labels: contrib, hadoop, pig
>
> A LoadPushDown is nice for use with Pig because if you do something like:
> {code}
> rows = LOAD 'cassandra://ks/cf' USING CassandraStorage();
> A = FOREACH rows GENERATE $0;
> {code}
> It would push down the projection and only get the keys from Cassandra
> instead of all of the rows - it allows Pig to optimize what it gets from
> Cassandra when it looks at the pig script. The script above might not be the
> best example but projections would allow pig to optimize retrieval from
> Cassandra in something like that.
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