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Posted to dev@kylin.apache.org by "hongbin ma (JIRA)" <ji...@apache.org> on 2016/02/26 08:45:18 UTC

[jira] [Created] (KYLIN-1453) cuboid sharding based on specific column

hongbin ma created KYLIN-1453:
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             Summary: cuboid sharding based on specific column
                 Key: KYLIN-1453
                 URL: https://issues.apache.org/jira/browse/KYLIN-1453
             Project: Kylin
          Issue Type: Improvement
            Reporter: hongbin ma
            Assignee: hongbin ma


currently cuboid sharding is based on the hash value of the row key. If we allow computing hash value on a specific column C, then we're actually partitioning the data w.r.t C. The benefit is that if we later a query with filter like "where C = 'xyz'", kylin can skip shards. Also for filter like "where C IN {many candidates}", kylin can prune candidates sent to different shards



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