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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-2391) Create a LoadPushDown implementation for CassandraStorage
Date Tue, 24 Jun 2014 23:12:26 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-2391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis resolved CASSANDRA-2391.
---------------------------------------

    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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