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Posted to dev@hive.apache.org by "Zheng Shao (JIRA)" <ji...@apache.org> on 2009/03/20 20:42:50 UTC

[jira] Created: (HIVE-357) Add order-sensitive and order-insensitive hashing aggregation functions (UDAF)

Add order-sensitive and order-insensitive hashing aggregation functions (UDAF)
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                 Key: HIVE-357
                 URL: https://issues.apache.org/jira/browse/HIVE-357
             Project: Hadoop Hive
          Issue Type: New Feature
          Components: Query Processor
            Reporter: Zheng Shao
            Assignee: Zheng Shao


In order to test whether a new version of Hive produces exactly the same result as an order version, we usually want to run a bunch of big queries as well as small queries.

It's hard to compare the result of big queries, but if we have a hashing aggregation function, we can just aggregate the result of big queries and compare the single number.


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