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From "Alex Liu (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-8576) Primary Key Pushdown For Hadoop
Date Wed, 14 Jan 2015 23:52:35 GMT


Alex Liu updated CASSANDRA-8576:
    Attachment: 8576-2.1-branch.txt

v1 patch is attached to only support full partition key EQ queries.

> Primary Key Pushdown For Hadoop
> -------------------------------
>                 Key: CASSANDRA-8576
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Hadoop
>            Reporter: Russell Alexander Spitzer
>         Attachments: 8576-2.1-branch.txt
> 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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