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From "Russell Alexander Spitzer (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-8576) Primary Key Pushdown For Hadoop
Date Wed, 07 Jan 2015 18:52:34 GMT
Russell Alexander Spitzer created CASSANDRA-8576:
----------------------------------------------------

             Summary: Primary Key Pushdown For Hadoop
                 Key: CASSANDRA-8576
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8576
             Project: Cassandra
          Issue Type: Improvement
          Components: Hadoop
            Reporter: Russell Alexander Spitzer


I've heard reports from several users that they would like to have predicate pushdown functionality
for hadoop (Hive in particular) based services. 

Example usecase
Table with wide partitions, one per customer
Application team has HQL they would like to run on a single customer
Currently time to complete scales with number of customers since Input Format can't pushdown
primary key predicate
Current implementation requires a full table scan (since it can't recognize that a single
partition was specified)



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