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Posted to issues-all@impala.apache.org by "Fucun Chu (Jira)" <ji...@apache.org> on 2020/10/24 01:48:00 UTC

[jira] [Created] (IMPALA-10281) Implement count(distinct) function (DataSketches/CPC)

Fucun Chu created IMPALA-10281:
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             Summary: Implement count(distinct) function (DataSketches/CPC)
                 Key: IMPALA-10281
                 URL: https://issues.apache.org/jira/browse/IMPALA-10281
             Project: IMPALA
          Issue Type: New Feature
          Components: Backend
            Reporter: Fucun Chu


Implement the count(distinct) function from the DataSketches library for CPC in C++.

General info about the sketch:
[http://datasketches.apache.org/docs/CPC/CPC.html|http://datasketches.apache.org/docs/HLL/HLL.html]

C++ implementation to wrap:
[https://github.com/apache/incubator-datasketches-cpp/tree/master/cpc|https://github.com/apache/incubator-datasketches-cpp/tree/master/hll]



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